Earlier editions: 2022 2019

1315.6 Variable Gas Pressures. Where the supply gas

California Mechanical Code (Title 24, Part 4) · 2025 edition · updated 2026-09-10 · California

Italicized text is a California amendment to the model code, as printed in the official publication.

pressure exceeds 5 psi (34 kPa) for natural gas and 10 psi (69 kPa) for undiluted propane or is less than 6 inches (1.5 kPa) of water column, or where diversity demand factors are used, the design, pipe, sizing, materials, location, and use of such systems first shall be approved by the Authority Having Jurisdiction. Piping systems designed for pressures exceeding the serving gas supplier’s standard delivery pressure shall have prior verification from the gas supplier of the availability of the design pressure.

FUEL GAS PIPING

FIGURE 1315.1.1 EXAMPLE ILLUSTRATING USE OF TABLE 1308.3.1 AND TABLE 1315.2(1) Problem: Determine the required pipe size of each section and outlet of the piping system shown in Figure 1315.1.1. Gas to be used has a specific gravity of 0.60 and 1100 British thermal units (Btu) per cubic foot (0.0114 kW•h/L), delivered at 8 inch water column (1.9 kPa) pressure.

For SI units: 1 foot = 304.8 mm, 1 gallon = 3.785 L, 1000 British thermal units per hour = 0.293 kW, 1 cubic foot per hour = 0.0283 m [3] /h

Solution:

(1) Maximum gas demand of Outlet A – 32 cubic feet per hour (0.91 m [3] /h) (from Table 1308.3.1).

Maximum gas demand of Outlet B – 3 cubic feet per hour (0.08 m [3] /h) (from Table 1308.3.1).

Maximum gas demand of Outlet C – 59 cubic feet per hour (1.67 m [3] /h) (from Table 1308.3.1).

Maximum gas demand of Outlet D – 136 cubic feet per hour (3.85 m [3] /h) [150 000 Btu/hour (44 kW)] divided by 1100 Btu per cubic foot (0.0114 kW•h/L)

(2) The length of pipe from the gas meter to the most remote outlet (Outlet A) is 60 feet (18 288 mm).

(3) Using the length in feet column row marked 60 feet (18 288 mm) in Table 13 15 .2(1): Outlet A, supplying 32 cubic feet per hour (0.91 m [3] /h), requires [1] ⁄ 2 of an inch (15 mm) pipe. Section 1, supplying Outlets A and B, or 35 cubic feet per hour (0.99 m [3] /h) requires [1] ⁄ 2 of an inch (15 mm) pipe. Section 2, supplying Outlets A, B, and C, or 94 cubic feet per hour (2.66 m [3] /h) requires [3] ⁄ 4 of an inch (20 mm) pipe.

Section 3, supplying Outlets A, B, C, and D, or 230 cubic feet per hour (6.51 m [3] /h), requires 1 inch (25 mm) pipe.

(4) Using the column marked 60 feet (18 288 mm) in Table 13 15 .2(1): Outlet B supplying 3 cubic feet per hour (0.08 m [3] /h), requires [1] ⁄ 2 of an inch (15 mm) pipe. Outlet C, supplying 59 cubic feet per hour (1.67 m [3] /h), requires [1] ⁄ 2 of an inch (15 mm) pipe.

Using the column marked 60 feet (18 288 mm) in Table 13 15 .2(1): Outlet D, supplying 136 cubic feet per hour (3.85 m [3] /h), requires [3] ⁄ 4 of an inch (20 mm) pipe.

296 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(1) SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.2.1(b)]1,2

									GAS:	GAS:	GAS:	NATURAL	NATURAL	NATURAL
									INLET PRESSURE:	INLET PRESSURE:	INLET PRESSURE:	LESS THAN 2 psi	LESS THAN 2 psi	LESS THAN 2 psi
									PRESSURE DROP:	PRESSURE DROP:	PRESSURE DROP:	0.5 in. w.c.	0.5 in. w.c.	0.5 in. w.c.
									SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60	0.60
	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)
NOMINAL:	1⁄2	3⁄4	1	11⁄4	11⁄2	2	21⁄2	3	4	5	6	8	10	12
ACTUAL ID:	0.622	0.824	1.049	1.380	1.610	2.067	2.469	3.068	4.026	5.047	6.065	7.981	10.020	11.938
LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10 20 30 40 50	172 118 95 81 72	360 247 199 170 151	678 466 374 320 284	1390 957 768 657 583	2090 1430 1150 985 873	4020 2760 2220 1900 1680	6400 4400 3530 3020 2680	11 300 7780 6250 5350 4740	23 100 15 900 12 700 10 900 9660	41 800 28 700 23 000 19 700 17 500	67 600 46 500 37 300 31 900 28 300	139 000 95 500 76 700 65 600 58 200	252 000 173 000 139 000 119 000 106 000	399 000 275 000 220 000 189 000 167 000
60 70 80 90 100	65 60 56 52 50	137 126 117 110 104	257 237 220 207 195	528 486 452 424 400	791 728 677 635 600	1520 1400 1300 1220 1160	2430 2230 2080 1950 1840	4290 3950 3670 3450 3260	8760 8050 7490 7030 6640	15 800 14 600 13 600 12 700 12 000	25 600 23 600 22 000 20 600 19 500	52 700 48 500 45 100 42 300 40 000	95 700 88 100 81 900 76 900 72 600	152 000 139 000 130 000 122 000 115 000
125 150 175 200 250	44 40 37 34 30	92 83 77 71 63	173 157 144 134 119	355 322 296 275 244	532 482 443 412 366	1020 928 854 794 704	1630 1480 1360 1270 1120	2890 2610 2410 2240 1980	5890 5330 4910 4560 4050	10 600 9650 8880 8260 7320	17 200 15 600 14 400 13 400 11 900	35 400 32 100 29 500 27 500 24 300	64 300 58 300 53 600 49 900 44 200	102 000 92 300 84 900 79 000 70 000
300 350 400 450 500	27 25 23 22 21	57 53 49 46 43	108 99 92 86 82	221 203 189 177 168	331 305 283 266 251	638 587 546 512 484	1020 935 870 816 771	1800 1650 1540 1440 1360	3670 3370 3140 2940 2780	6630 6100 5680 5330 5030	10 700 9880 9190 8620 8150	22 100 20 300 18 900 17 700 16 700	40 100 36 900 34 300 32 200 30 400	63 400 58 400 54 300 50 900 48 100
550 600 650 700 750	20 19 18 17 17	41 39 38 36 35	78 74 71 68 66	159 152 145 140 135	239 228 218 209 202	459 438 420 403 389	732 699 669 643 619	1290 1240 1180 1140 1090	2640 2520 2410 2320 2230	4780 4560 4360 4190 4040	7740 7380 7070 6790 6540	15 900 15 200 14 500 14 000 13 400	28 900 27 500 26 400 25 300 24 400	45 700 43 600 41 800 40 100 38 600
800 850 900 950 1000	16 16 15 15 14	34 33 32 31 30	63 61 59 58 56	130 126 122 118 115	195 189 183 178 173	375 363 352 342 333	598 579 561 545 530	1060 1020 992 963 937	2160 2090 2020 1960 1910	3900 3780 3660 3550 3460	6320 6110 5930 5760 5600	13 000 12 600 12 200 11 800 11 500	23 600 22 800 22 100 21 500 20 900	37 300 36 100 35 000 34 000 33 100
1100 1200 1300 1400 1500	14 13 12 12 11	28 27 26 25 24	53 51 49 47 45	109 104 100 96 93	164 156 150 144 139	316 301 289 277 267	503 480 460 442 426	890 849 813 781 752	1810 1730 1660 1590 1530	3280 3130 3000 2880 2780	5320 5070 4860 4670 4500	10 900 10 400 9980 9590 9240	19 800 18 900 18 100 17 400 16 800	31 400 30 000 28 700 27 600 26 600

TABLE 1315.2(1) SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.2.1(b)]1,2

1600 1700 1800 1900 2000	11 11 10 10 NA	23 22 22 21 20	44 42 41 40 39	89 86 84 81 79	134 130 126 122 119	258 250 242 235 229	411 398 386 375 364	727 703 682 662 644	1480 1430 1390 1350 1310	2680 2590 2520 2440 2380	4340 4200 4070 3960 3850	8920 8630 8370 8130 7910	16 200 15 700 15 200 14 800 14 400	25 600 24 800 24 100 23 400 22 700

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPa

Notes: 1 Table entries are rounded to 3 significant digits. 2 NA means a flow of less than 10 ft 3 /h (0.283 m 3 /h).

FUEL GAS PIPING

TABLE 1315.2(2) SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.2.1(c)]*

						GAS:	GAS:	NATURAL	NATURAL
						INLET PRESSURE:	INLET PRESSURE:	LESS THAN 2 psi	LESS THAN 2 psi
						PRESSURE DROP:	PRESSURE DROP:	3.0 in. w.c.	3.0 in. w.c.
						SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60
INTENDED USE: INITIAL SUPPLY PRESSURE OF 8.0 IN. W.C. OR GREATER
	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)
NOMINAL:	1⁄2	3⁄4	1	1¼	11⁄2	2	21⁄2	3	4
ACTUAL ID:	0.622	0.824	1.049	1.380	1.610	2.067	2.469	3.068	4.026
LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10	454	949	1790	3670	5500	10 600	16 900	29 800	60 800
20	312	652	1230	2520	3780	7280	11 600	20 500	41 800
30	250	524	986	2030	3030	5840	9310	16 500	33 600
40	214	448	844	1730	2600	5000	7970	14 100	28 700
50	190	397	748	1540	2300	4430	7060	12 500	25 500
60	172	360	678	1390	2090	4020	6400	11 300	23 100
70	158	331	624	1280	1920	3690	5890	10 400	21 200
80	147	308	580	1190	1790	3440	5480	9690	19 800
90	138	289	544	1120	1670	3230	5140	9090	18 500
100	131	273	514	1060	1580	3050	4860	8580	17 500
125	116	242	456	936	1400	2700	4300	7610	15 500
150	105	219	413	848	1270	2450	3900	6890	14 100
175	96	202	380	780	1170	2250	3590	6340	12 900
200	90	188	353	726	1090	2090	3340	5900	12 000
250	80	166	313	643	964	1860	2960	5230	10 700
300	72	151	284	583	873	1680	2680	4740	9660
350	66	139	261	536	803	1550	2470	4360	8890
400	62	129	243	499	747	1440	2290	4050	8270
450	58	121	228	468	701	1350	2150	3800	7760
500	55	114	215	442	662	1280	2030	3590	7330
550	52	109	204	420	629	1210	1930	3410	6960
600	50	104	195	400	600	1160	1840	3260	6640
650	47	99	187	384	575	1110	1760	3120	6360
700	46	95	179	368	552	1060	1690	3000	6110
750	44	92	173	355	532	1020	1630	2890	5890
800	42	89	167	343	514	989	1580	2790	5680
850	41	86	162	332	497	957	1530	2700	5500
900	40	83	157	322	482	928	1480	2610	5330
950	39	81	152	312	468	901	1440	2540	5180
1000	38	79	148	304	455	877	1400	2470	5040
1100	36	75	141	289	432	833	1330	2350	4780
1200	34	71	134	275	412	794	1270	2240	4560
1300	33	68	128	264	395	761	1210	2140	4370
1400	31	65	123	253	379	731	1160	2060	4200
1500	30	63	119	244	366	704	1120	1980	4050
1600	29	61	115	236	353	680	1080	1920	3910
1700	28	59	111	228	342	658	1050	1850	3780
1800	27	57	108	221	331	638	1020	1800	3670
1900	27	56	105	215	322	619	987	1750	3560
2000	26	54	102	209	313	602	960	1700	3460

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPa

Table entries are rounded to 3 significant digits.

298 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(3) SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.2.1(d)]*

						GAS:	GAS:	NATURAL	NATURAL
						INLET PRESSURE:	INLET PRESSURE:	LESS THAN 2 psi	LESS THAN 2 psi
						PRESSURE DROP:	PRESSURE DROP:	6.0 in. w.c.	6.0 in. w.c.
						SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60
INTENDED USE: INITIAL SUPPLY PRESSURE OF 11.0 IN. W.C. OR GREATER
	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)
NOMINAL:	1⁄2	3⁄4	1	11⁄4	11⁄2	2	21⁄2	3	4
ACTUAL ID:	0.622	0.824	1.049	1.38	1.61	2.067	2.469	3.068	4.026
LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10	660	1380	2600	5340	8000	15 400	24 600	43 400	88 500
20	454	949	1790	3670	5500	10 600	16 900	29 800	60 800
30	364	762	1440	2950	4410	8500	13 600	24 000	48 900
40	312	652	1230	2520	3780	7280	11 600	20 500	41 800
50	276	578	1090	2240	3350	6450	10 300	18 200	37 100
60	250	524	986	2030	3030	5840	9310	16 500	33 600
70	230	482	907	1860	2790	5380	8570	15 100	30 900
80	214	448	844	1730	2600	5000	7970	14 100	28 700
90	201	420	792	1630	2440	4690	7480	13 200	27 000
100	190	397	748	1540	2300	4430	7060	12 500	25 500
125	168	352	663	1360	2040	3930	6260	11 100	22 600
150	153	319	601	1230	1850	3560	5670	10 000	20 500
175	140	293	553	1140	1700	3270	5220	9230	18 800
200	131	273	514	1056	1580	3050	4860	8580	17 500
250	116	242	456	936	1400	2700	4300	7610	15 500
300	105	219	413	848	1270	2450	3900	6890	14 100
350	96	202	380	780	1170	2250	3590	6340	12 900
400	90	188	353	726	1090	2090	3340	5900	12 000
450	84	176	332	681	1020	1960	3130	5540	11 300
500	80	166	313	643	964	1860	2960	5230	10 700
550	76	158	297	611	915	1760	2810	4970	10 100
600	72	151	284	583	873	1680	2680	4740	9660
650	69	144	272	558	836	1610	2570	4540	9250
700	66	139	261	536	803	1550	2470	4360	8890
750	64	134	252	516	774	1490	2380	4200	8560
800	62	129	243	499	747	1440	2290	4050	8270
850	60	125	235	483	723	1390	2220	3920	8000
900	58	121	228	468	701	1350	2150	3800	7760
950	56	118	221	454	681	1310	2090	3690	7540
1000	55	114	215	442	662	1280	2030	3590	7330
1100	52	109	204	420	629	1210	1930	3410	6960
1200	50	104	195	400	600	1160	1840	3260	6640
1300	47	99	187	384	575	1110	1760	3120	6360
1400	46	95	179	368	552	1060	1690	3000	6110
1500	44	92	173	355	532	1020	1630	2890	5890
1600	42	89	167	343	514	989	1580	2790	5680
1700	41	86	162	332	497	957	1530	2700	5500
1800	40	83	157	322	482	928	1480	2610	5330
1900	39	81	152	312	468	901	1440	2540	5180
2000	38	79	148	304	455	877	1400	2470	5040

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPa

Table entries are rounded to 3 significant digits.

FUEL GAS PIPING

TABLE 1315.2(4) SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.2.1(e)]*

						GAS:	GAS:	NATURAL	NATURAL
						INLET PRESSURE:	INLET PRESSURE:	2.0 psi	2.0 psi
						PRESSURE DROP:	PRESSURE DROP:	1.0 psi	1.0 psi
						SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60
	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)
NOMINAL:	1⁄2	3⁄4	1	11⁄4	11⁄2	2	21⁄2	3	4
ACTUAL ID:	0.622	0.824	1.049	1.380	1.610	2.067	2.469	3.068	4.026
LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10 20 30 40 50	1510 1070 869 753 673	3040 2150 1760 1520 1360	5560 3930 3210 2780 2490	11 400 8070 6590 5710 5110	17 100 12 100 9880 8550 7650	32 900 23 300 19 000 16 500 14 700	52 500 37 100 30 300 26 300 23 500	92 800 65 600 53 600 46 400 41 500	189 000 134 000 109 000 94 700 84 700
60 70 80 90 100	615 569 532 502 462	1240 1150 1080 1010 934	2270 2100 1970 1850 1710	4660 4320 4040 3810 3510	6980 6470 6050 5700 5260	13 500 12 500 11 700 11 000 10 100	21 400 19 900 18 600 17 500 16 100	37 900 35 100 32 800 30 900 28 500	77 300 71 600 67 000 63 100 58 200
125 150 175 200 250	414 372 344 318 279	836 751 695 642 583	1530 1370 1270 1170 1040	3140 2820 2601 2410 2140	4700 4220 3910 3610 3210	9060 8130 7530 6960 6180	14 400 13 000 12 000 11 100 9850	25 500 22 900 21 200 19 600 17 400	52 100 46 700 43 300 40 000 35 500
300 350 400 450 500	253 232 216 203 192	528 486 452 424 401	945 869 809 759 717	1940 1790 1660 1560 1470	2910 2670 2490 2330 2210	5600 5150 4790 4500 4250	8920 8210 7640 7170 6770	15 800 14 500 13 500 12 700 12 000	32 200 29 600 27 500 25 800 24 400
550 600 650 700 750	182 174 166 160 154	381 363 348 334 322	681 650 622 598 576	1400 1330 1280 1230 1180	2090 2000 1910 1840 1770	4030 3850 3680 3540 3410	6430 6130 5870 5640 5440	11 400 10 800 10 400 9970 9610	23 200 22 100 21 200 20 300 19 600
800 850 900 950 1000	149 144 139 135 132	311 301 292 283 275	556 538 522 507 493	1140 1100 1070 1040 1010	1710 1650 1600 1560 1520	3290 3190 3090 3000 2920	5250 5080 4930 4780 4650	9280 8980 8710 8460 8220	18 900 18 300 17 800 17 200 16 800
1100 1200 1300 1400 1500	125 119 114 110 106	262 250 239 230 221	468 446 427 411 396	960 917 878 843 812	1440 1370 1320 1260 1220	2770 2640 2530 2430 2340	4420 4220 4040 3880 3740	7810 7450 7140 6860 6600	15 900 15 200 14 600 14 000 13 500
1600 1700 1800 1900 2000	102 99 96 93 91	214 207 200 195 189	382 370 358 348 339	784 759 736 715 695	1180 1140 1100 1070 1040	2260 2190 2120 2060 2010	3610 3490 3390 3290 3200	6380 6170 5980 5810 5650	13 000 12 600 12 200 11 900 11 500

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa

Table entries are rounded to 3 significant digits.

300 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(5) SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.2.1(f)]*

						GAS:	GAS:	NATURAL	NATURAL
						INLET PRESSURE:	INLET PRESSURE:	3.0 psi	3.0 psi
						PRESSURE DROP:	PRESSURE DROP:	2.0 psi	2.0 psi
						SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60
	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)
NOMINAL:	1⁄2	3⁄4	1	11⁄4	11⁄2	2	21⁄2	3	4
ACTUAL ID:	0.622	0.824	1.049	1.380	1.610	2.067	2.469	3.068	4.026
LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10 20 30 40 50	2350 1620 1300 1110 985	4920 3380 2720 2320 2060	9270 6370 5110 4380 3880	19 000 13 100 10 500 8990 7970	28 500 19 600 15 700 13 500 11 900	54 900 37 700 30 300 25 900 23 000	87 500 60 100 48 300 41 300 36 600	155 000 106 000 85 400 73 100 64 800	316 000 217 000 174 000 149 000 132 000
60 70 80 90 100	892 821 764 717 677	1870 1720 1600 1500 1420	3520 3230 3010 2820 2670	7220 6640 6180 5800 5470	10 800 9950 9260 8680 8200	20 800 19 200 17 800 16 700 15 800	33 200 30 500 28 400 26 700 25 200	58 700 54 000 50 200 47 100 44 500	120 000 110 000 102 000 96 100 90 800
125 150 175 200 250	600 544 500 465 412	1250 1140 1050 973 862	2360 2140 1970 1830 1620	4850 4400 4040 3760 3330	7270 6590 6060 5640 5000	14 000 12 700 11 700 10 900 9620	22 300 20 200 18 600 17 300 15 300	39 500 35 700 32 900 30 600 27 100	80 500 72 900 67 100 62 400 55 300
300 350 400 450 500	374 344 320 300 283	781 719 669 627 593	1470 1350 1260 1180 1120	3020 2780 2590 2430 2290	4530 4170 3870 3640 3430	8720 8020 7460 7000 6610	13 900 12 800 11 900 11 200 10 500	24 600 22 600 21 000 19 700 18 600	50 100 46 100 42 900 40 200 38 000
550 600 650 700 750	269 257 246 236 228	563 537 514 494 476	1060 1010 969 931 897	2180 2080 1990 1910 1840	3260 3110 2980 2860 2760	6280 5990 5740 5510 5310	10 000 9550 9150 8790 8470	17 700 16 900 16 200 15 500 15 000	36 100 34 400 33 000 31 700 30 500
800 850 900 950 1000	220 213 206 200 195	460 445 431 419 407	866 838 812 789 767	1780 1720 1670 1620 1580	2660 2580 2500 2430 2360	5130 4960 4810 4670 4550	8180 7910 7670 7450 7240	14 500 14 000 13 600 13 200 12 800	29 500 28 500 27 700 26 900 26 100
1100 1200 1300 1400 1500	185 177 169 162 156	387 369 353 340 327	729 695 666 640 616	1500 1430 1370 1310 1270	2240 2140 2050 1970 1900	4320 4120 3940 3790 3650	6890 6570 6290 6040 5820	12 200 11 600 11 100 10 700 10 300	24 800 23 700 22 700 21 800 21 000
1600 1700 1800 1900 2000	151 146 142 138 134	316 306 296 288 280	595 576 558 542 527	1220 1180 1150 1110 1080	1830 1770 1720 1670 1620	3530 3410 3310 3210 3120	5620 5440 5270 5120 4980	10 000 9610 9320 9050 8800	20 300 19 600 19 000 18 400 18 000

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa

Table entries are rounded to 3 significant digits.

FUEL GAS PIPING

TABLE 1315.2(6) SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.2.1(g)]*

						GAS:	GAS:	NATURAL	NATURAL
						INLET PRESSURE:	INLET PRESSURE:	5.0 psi	5.0 psi
						PRESSURE DROP:	PRESSURE DROP:	3.5 psi	3.5 psi
						SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60
	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)
NOMINAL:	1⁄2	3⁄4	1	11⁄4	11⁄2	2	21⁄2	3	4
ACTUAL ID:	0.622	0.824	1.049	1.380	1.610	2.067	2.469	3.068	4.026
LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10 20 30 40 50	3190 2250 1840 1590 1430	6430 4550 3720 3220 2880	11 800 8320 6790 5880 5260	24 200 17 100 14 000 12 100 10 800	36 200 25 600 20 900 18 100 16 200	69 700 49 300 40 300 34 900 31 200	111 000 78 600 64 200 55 600 49 700	196 000 139 000 113 000 98 200 87 900	401 000 283 000 231 000 200 000 179 000
60 70 80 90 100	1300 1200 1150 1060 979	2630 2430 2330 2150 1980	4800 4450 4260 3920 3620	9860 9130 8540 8050 7430	14 800 13 700 12 800 12 100 11 100	28 500 26 400 24 700 23 200 21 400	45 400 42 000 39 300 37 000 34 200	80 200 74 300 69 500 65 500 60 400	164 000 151 000 142 000 134 000 123 000
125 150 175 200 250	876 786 728 673 558	1770 1590 1470 1360 1170	3240 2910 2690 2490 2200	6640 5960 5520 5100 4510	9950 8940 8270 7650 6760	19 200 17 200 15 900 14 700 13 000	30 600 27 400 25 400 23 500 20 800	54 000 48 500 44 900 41 500 36 700	110 000 98 900 91 600 84 700 74 900
300 350 400 450 500	506 465 433 406 384	1060 973 905 849 802	1990 1830 1710 1600 1510	4090 3760 3500 3290 3100	6130 5640 5250 4920 4650	11 800 10 900 10 100 9480 8950	18 800 17 300 16 100 15 100 14 300	33 300 30 600 28 500 26 700 25 200	67 800 62 400 58 100 54 500 51 500
550 600 650 700 750	364 348 333 320 308	762 727 696 669 644	1440 1370 1310 1260 1210	2950 2810 2690 2590 2490	4420 4210 4030 3880 3730	8500 8110 7770 7460 7190	13 600 12 900 12 400 11 900 11 500	24 000 22 900 21 900 21 000 20 300	48 900 46 600 44 600 42 900 41 300
800 850 900 950 1000	298 288 279 271 264	622 602 584 567 551	1170 1130 1100 1070 1040	2410 2330 2260 2190 2130	3610 3490 3380 3290 3200	6940 6720 6520 6330 6150	11 100 10 700 10 400 10 100 9810	19 600 18 900 18 400 17 800 17 300	39 900 38 600 37 400 36 400 35 400
1100 1200 1300 1400 1500	250 239 229 220 212	524 500 478 460 443	987 941 901 866 834	2030 1930 1850 1780 1710	3030 2900 2770 2660 2570	5840 5580 5340 5130 4940	9320 8890 8510 8180 7880	16 500 15 700 15 000 14 500 13 900	33 600 32 000 30 700 29 500 28 400
1600 1700 1800 1900 2000	205 198 192 186 181	428 414 401 390 379	806 780 756 734 714	1650 1600 1550 1510 1470	2480 2400 2330 2260 2200	4770 4620 4480 4350 4230	7610 7360 7140 6930 6740	13 400 13 000 12 600 12 300 11 900	27 400 26 500 25 700 25 000 24 300

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa

Table entries are rounded to 3 significant digits.

302 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(7) SEMI-RIGID COPPER TUBING [NFPA 54: TABLE 6.2.1(h)]1, 2

							GAS:	GAS:	NATURAL	NATURAL
							INLET PRESSURE:	INLET PRESSURE:	LESS THAN 2 psi	LESS THAN 2 psi
							PRESSURE DROP:	PRESSURE DROP:	0.3 in. w.c.	0.3 in. w.c.
							SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60
	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)
NOMINAL:	K & L:	1⁄4	3⁄8	1⁄2	5⁄8	3⁄4	1	11⁄4	11⁄2	2
NOMINAL:	ACR:	3⁄8	1⁄2	5⁄8	3⁄4	7⁄8	11⁄8	13⁄8	–	–
OUTSIDE:	OUTSIDE:	0.375	0.500	0.625	0.750	0.875	1.125	1.375	1.625	2.125
INSIDE:3	INSIDE:3	0.305	0.402	0.527	0.652	0.745	0.995	1.245	1.481	1.959
LENGTH (feet)	LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10 20 30 40 50	10 20 30 40 50	20 14 11 10 NA	42 29 23 20 17	85 58 47 40 35	148 102 82 70 62	210 144 116 99 88	448 308 247 211 187	806 554 445 381 337	1270 873 701 600 532	2650 1820 1460 1250 1110
60 70 80 90 100	60 70 80 90 100	NA NA NA NA NA	16 14 13 13 12	32 29 27 26 24	56 52 48 45 43	79 73 68 64 60	170 156 145 136 129	306 281 262 245 232	482 443 413 387 366	1000 924 859 806 761
125 150 175 200 250	125 150 175 200 250	NA NA NA NA NA	11 10 NA NA NA	22 20 18 17 15	38 34 31 29 26	53 48 45 41 37	114 103 95 89 78	206 186 171 159 141	324 294 270 251 223	675 612 563 523 464
300 350 400 450 500	300 350 400 450 500	NA NA NA NA NA	NA NA NA NA NA	13 12 11 11 10	23 22 20 19 18	33 31 28 27 25	71 65 61 57 54	128 118 110 103 97	202 186 173 162 153	420 387 360 338 319
550 600 650 700 750	550 600 650 700 750	NA NA NA NA NA	NA NA NA NA NA	NA NA NA NA NA	17 16 15 15 14	24 23 22 21 20	51 49 47 45 43	92 88 84 81 78	145 139 133 128 123	303 289 277 266 256
800 850 900 950 1000	800 850 900 950 1000	NA NA NA NA NA	NA NA NA NA NA	NA NA NA NA NA	14 13 13 13 12	20 19 18 18 17	42 40 39 38 37	75 73 71 69 67	119 115 111 108 105	247 239 232 225 219
1100 1200 1300 1400 1500	1100 1200 1300 1400 1500	NA NA NA NA NA	NA NA NA NA NA	NA NA NA NA NA	12 11 11 10 NA	16 16 15 14 14	35 34 32 31 30	63 60 58 56 54	100 95 91 88 84	208 199 190 183 176
1600 1700 1800 1900 2000	1600 1700 1800 1900 2000	NA NA NA NA NA	NA NA NA NA NA	NA NA NA NA NA	NA NA NA NA NA	13 13 13 12 12	29 28 27 26 25	52 50 49 47 46	82 79 77 74 72	170 164 159 155 151

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPa

Notes : 1 Table entries are rounded to 3 significant digits. 2 NA means a flow of less than 10 ft 3 /h (0.283 m 3 /h). 3 Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.

FUEL GAS PIPING

TABLE 1315.2(8) SEMI-RIGID COPPER TUBING [NFPA 54: TABLE 6.2.1(i)]1, 2

							GAS:	GAS:	NATURAL	NATURAL
							INLET PRESSURE:	INLET PRESSURE:	LESS THAN 2 psi	LESS THAN 2 psi
							PRESSURE DROP:	PRESSURE DROP:	0.5 in. w.c.	0.5 in. w.c.
							SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60
		TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)
NOMINAL:	K & L:	1⁄4	3⁄8	1⁄2	5⁄8	3⁄4	1	11⁄4	11⁄2	2
NOMINAL:	ACR:	3⁄8	1⁄2	5⁄8	3⁄4	7⁄8	11⁄8	13⁄8	–	–
OUTSIDE:	OUTSIDE:	0.375	0.500	0.625	0.750	0.875	1.125	1.375	1.625	2.125
INSIDE:3	INSIDE:3	0.305	0.402	0.527	0.652	0.745	0.995	1.245	1.481	1.959
LENGTH (feet)	LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10 20 30 40 50	10 20 30 40 50	27 18 15 13 11	55 38 30 26 23	111 77 61 53 47	195 134 107 92 82	276 190 152 131 116	590 406 326 279 247	1060 730 586 502 445	1680 1150 925 791 701	3490 2400 1930 1650 1460
60 70 80 90 100	60 70 80 90 100	10 NA NA NA NA	21 19 18 17 16	42 39 36 34 32	74 68 63 59 56	105 96 90 84 79	224 206 192 180 170	403 371 345 324 306	635 585 544 510 482	1320 1220 1130 1060 1000
125 150 175 200 250	125 150 175 200 250	NA NA NA NA NA	14 13 12 11 NA	28 26 24 22 20	50 45 41 39 34	70 64 59 55 48	151 136 125 117 103	271 245 226 210 186	427 387 356 331 294	890 806 742 690 612
300 350 400 450 500	300 350 400 450 500	NA NA NA NA NA	NA NA NA NA NA	18 16 15 14 13	31 28 26 25 23	44 40 38 35 33	94 86 80 75 71	169 155 144 135 128	266 245 228 214 202	554 510 474 445 420
550 600 650 700 750	550 600 650 700 750	NA NA NA NA NA	NA NA NA NA NA	13 12 12 11 11	22 21 20 20 19	32 30 29 28 27	68 64 62 59 57	122 116 111 107 103	192 183 175 168 162	399 381 365 350 338
800 850 900 950 1000	800 850 900 950 1000	NA NA NA NA NA	NA NA NA NA NA	10 10 NA NA NA	18 18 17 17 16	26 25 24 24 23	55 53 52 50 49	99 96 93 90 88	156 151 147 143 139	326 315 306 297 289
1100 1200 1300 1400 1500	1100 1200 1300 1400 1500	NA NA NA NA NA	NA NA NA NA NA	NA NA NA NA NA	15 15 14 13 13	22 21 20 19 18	46 44 42 41 39	84 80 76 73 71	132 126 120 116 111	274 262 251 241 232
1600 1700 1800 1900 2000	1600 1700 1800 1900 2000	NA NA NA NA NA	NA NA NA NA NA	NA NA NA NA NA	13 12 12 11 11	18 17 17 16 16	38 37 36 35 34	68 66 64 62 60	108 104 101 98 95	224 217 210 204 199

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPa

304 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(9) SEMI-RIGID COPPER TUBING [NFPA 54: TABLE 6.2.1(j)]1, 2

							GAS:	GAS:	NATURAL	NATURAL
							INLET PRESSURE:	INLET PRESSURE:	LESS THAN 2 psi	LESS THAN 2 psi
							PRESSURE DROP:	PRESSURE DROP:	1.0 in. w.c.	1.0 in. w.c.
							SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60
INTENDED USE: TUBE SIZING BETWEEN HOUSE LINE REGULATOR AND THE APPLIANCE
		TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)
NOMINAL:	K & L:	1⁄4	3⁄8	1⁄2	5⁄8	3⁄4	1	11⁄4	11⁄2	2
NOMINAL:	ACR:	3⁄8	1⁄2	5⁄8	3⁄4	7⁄8	11⁄8	13⁄8	–	–
OUTSIDE:	OUTSIDE:	0.375	0.500	0.625	0.750	0.875	1.125	1.375	1.625	2.125
INSIDE:3	INSIDE:3	0.305	0.402	0.527	0.652	0.745	0.995	1.245	1.481	1.959
LENGTH (feet)	LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10 20 30 40 50	10 20 30 40 50	39 27 21 18 16	80 55 44 38 33	162 111 89 77 68	283 195 156 134 119	402 276 222 190 168	859 590 474 406 359	1550 1060 853 730 647	2440 1680 1350 1150 1020	5080 3490 2800 2400 2130
60 70 80 90 100	60 70 80 90 100	15 13 13 12 11	30 28 26 24 23	61 57 53 49 47	107 99 92 86 82	152 140 131 122 116	326 300 279 262 247	586 539 502 471 445	925 851 791 742 701	1930 1770 1650 1550 1460
125 150 175 200 250	125 150 175 200 250	NA NA NA NA NA	20 18 17 16 14	41 37 34 32 28	72 65 60 56 50	103 93 85 79 70	219 198 183 170 151	394 357 329 306 271	622 563 518 482 427	1290 1170 1080 1000 890
300 350 400 450 500	300 350 400 450 500	NA NA NA NA NA	13 12 11 10 NA	26 24 22 21 20	45 41 39 36 34	64 59 55 51 48	136 125 117 110 103	245 226 210 197 186	387 356 331 311 294	806 742 690 647 612
550 600 650 700 750	550 600 650 700 750	NA NA NA NA NA	NA NA NA NA NA	19 18 17 16 16	32 31 30 28 27	46 44 42 40 39	98 94 90 86 83	177 169 162 155 150	279 266 255 245 236	581 554 531 510 491
800 850 900 950 1000	800 850 900 950 1000	NA NA NA NA NA	NA NA NA NA NA	15 15 14 14 13	26 26 25 24 23	38 36 35 34 33	80 78 75 73 71	144 140 135 132 128	228 220 214 207 202	474 459 445 432 420
1100 1200 1300 1400 1500	1100 1200 1300 1400 1500	NA NA NA NA NA	NA NA NA NA NA	13 12 12 11 11	22 21 20 20 19	32 30 29 28 27	68 64 62 59 57	122 116 111 107 103	192 183 175 168 162	399 381 365 350 338
1600 1700 1800 1900 2000	1600 1700 1800 1900 2000	NA NA NA NA NA	NA NA NA NA NA	10 10 NA NA NA	18 18 17 17 16	26 25 24 24 23	55 53 52 50 49	99 96 93 90 88	156 151 147 143 139	326 315 306 297 289

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPa

FUEL GAS PIPING

TABLE 1315.2(10) SEMI-RIGID COPPER TUBING [NFPA 54: TABLE 6.2.1(k)]2

							GAS:	GAS:	NATURAL	NATURAL
							INLET PRESSURE:	INLET PRESSURE:	LESS THAN 2 psi	LESS THAN 2 psi
							PRESSURE DROP:	PRESSURE DROP:	17.0 in. w.c.	17.0 in. w.c.
							SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60
		TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)
NOMINAL:	K & L:	1⁄4	3⁄8	1⁄2	5⁄8	3⁄4	1	11⁄4	11⁄2	2
NOMINAL:	ACR:	3⁄8	1⁄2	5⁄8	3⁄4	7⁄8	11⁄8	13⁄8	–	–
OUTSIDE:	OUTSIDE:	0.375	0.500	0.625	0.750	0.875	1.125	1.375	1.625	2.125
INSIDE:1	INSIDE:1	0.305	0.402	0.527	0.652	0.745	0.995	1.245	1.481	1.959
LENGTH (feet)	LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10 20 30 40 50	10 20 30 40 50	190 130 105 90 79	391 269 216 185 164	796 547 439 376 333	1390 956 768 657 582	1970 1360 1090 932 826	4220 2900 2330 1990 1770	7590 5220 4190 3590 3180	12 000 8230 6610 5650 5010	24 900 17 100 13 800 11 800 10 400
60 70 80 90 100	60 70 80 90 100	72 66 62 58 55	148 137 127 119 113	302 278 258 243 229	528 486 452 424 400	749 689 641 601 568	1600 1470 1370 1280 1210	2880 2650 2460 2310 2180	4540 4180 3890 3650 3440	9460 8700 8090 7590 7170
125 150 175 200 250	125 150 175 200 250	48 44 40 38 33	100 90 83 77 69	203 184 169 157 140	355 321 296 275 244	503 456 420 390 346	1080 974 896 834 739	1940 1750 1610 1500 1330	3050 2770 2540 2370 2100	6360 5760 5300 4930 4370
300 350 400 450 500	300 350 400 450 500	30 28 26 24 23	62 57 53 50 47	126 116 108 102 96	221 203 189 177 168	313 288 268 252 238	670 616 573 538 508	1210 1110 1030 968 914	1900 1750 1630 1530 1440	3960 3640 3390 3180 3000
550 600 650 700 750	550 600 650 700 750	22 21 20 19 18	45 43 41 39 38	91 87 83 80 77	159 152 145 140 135	226 215 206 198 191	482 460 441 423 408	868 829 793 762 734	1370 1310 1250 1200 1160	2850 2720 2610 2500 2410
800 850 900 950 1000	800 850 900 950 1000	18 17 17 16 16	37 35 34 33 32	74 72 70 68 66	130 126 122 118 115	184 178 173 168 163	394 381 370 359 349	709 686 665 646 628	1120 1080 1050 1020 991	2330 2250 2180 2120 2060
1100 1200 1300 1400 1500	1100 1200 1300 1400 1500	15 14 14 13 13	31 29 28 27 26	63 60 57 55 53	109 104 100 96 93	155 148 142 136 131	332 316 303 291 280	597 569 545 524 505	941 898 860 826 796	1960 1870 1790 1720 1660
1600 1700 1800 1900 2000	1600 1700 1800 1900 2000	12 12 11 11 11	25 24 24 23 22	51 49 48 47 45	89 86 84 81 79	127 123 119 115 112	271 262 254 247 240	487 472 457 444 432	768 744 721 700 681	1600 1550 1500 1460 1420

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPa

Notes: 1 Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products. 2 Table entries are rounded to 3 significant digits.

306 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(11) SEMI-RIGID COPPER TUBING [NFPA 54: TABLE 6.2.1(l)]2

							GAS:	GAS:	NATURAL	NATURAL
							INLET PRESSURE:	INLET PRESSURE:	2.0 psi	2.0 psi
							PRESSURE DROP:	PRESSURE DROP:	1.0 psi	1.0 psi
							SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60
		TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)
NOMINAL:	K & L:	1⁄4	3⁄8	1⁄2	5⁄8	3⁄4	1	11⁄4	11⁄2	2
NOMINAL:	ACR:	3⁄8	1⁄2	5⁄8	3⁄4	7⁄8	11⁄8	13⁄8	–	–
OUTSIDE:	OUTSIDE:	0.375	0.500	0.625	0.750	0.875	1.125	1.375	1.625	2.125
INSIDE:1	INSIDE:1	0.305	0.402	0.527	0.652	0.745	0.995	1.245	1.481	1.959
LENGTH (feet)	LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10 20 30 40 50	10 20 30 40 50	245 169 135 116 103	506 348 279 239 212	1030 708 568 486 431	1800 1240 993 850 754	2550 1760 1410 1210 1070	5450 3750 3010 2580 2280	9820 6750 5420 4640 4110	15 500 10 600 8550 7310 6480	32 200 22 200 17 800 15 200 13 500
60 70 80 90 100	60 70 80 90 100	93 86 80 75 71	192 177 164 154 146	391 359 334 314 296	683 628 584 548 518	969 891 829 778 735	2070 1900 1770 1660 1570	3730 3430 3190 2990 2830	5870 5400 5030 4720 4450	12 200 11 300 10 500 9820 9280
125 150 175 200 250	125 150 175 200 250	63 57 52 49 43	129 117 108 100 89	263 238 219 204 181	459 416 383 356 315	651 590 543 505 448	1390 1260 1160 1080 956	2500 2270 2090 1940 1720	3950 3580 3290 3060 2710	8220 7450 6850 6380 5650
300 350 400 450 500	300 350 400 450 500	39 36 33 31 30	80 74 69 65 61	164 150 140 131 124	286 263 245 230 217	406 373 347 326 308	866 797 741 696 657	1560 1430 1330 1250 1180	2460 2260 2100 1970 1870	5120 4710 4380 4110 3880
550 600 650 700 750	550 600 650 700 750	28 27 26 25 24	58 55 53 51 49	118 112 108 103 100	206 196 188 181 174	292 279 267 256 247	624 595 570 548 528	1120 1070 1030 986 950	1770 1690 1620 1550 1500	3690 3520 3370 3240 3120
800 850 900 950 1000	800 850 900 950 1000	23 22 22 21 20	47 46 44 43 42	96 93 90 88 85	168 163 158 153 149	239 231 224 217 211	510 493 478 464 452	917 888 861 836 813	1450 1400 1360 1320 1280	3010 2920 2830 2740 2670
1100 1200 1300 1400 1500	1100 1200 1300 1400 1500	19 18 18 17 16	40 38 36 35 34	81 77 74 71 68	142 135 129 124 120	201 192 183 176 170	429 409 392 376 363	772 737 705 678 653	1220 1160 1110 1070 1030	2540 2420 2320 2230 2140
1600 1700 1800 1900 2000	1600 1700 1800 1900 2000	16 15 15 14 14	33 31 30 30 29	66 64 62 60 59	116 112 108 105 102	164 159 154 149 145	350 339 329 319 310	630 610 592 575 559	994 962 933 906 881	2070 2000 1940 1890 1830

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa

Notes : 1 Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products. 2 Table entries are rounded to 3 significant digits.

FUEL GAS PIPING

TABLE 1315.2(12) SEMI-RIGID COPPER TUBING [NFPA 54: TABLE 6.2.1(m)]3

							GAS:	GAS:	NATURAL	NATURAL
							INLET PRESSURE:	INLET PRESSURE:	2.0 psi	2.0 psi
							PRESSURE DROP:	PRESSURE DROP:	1.5 psi	1.5 psi
							SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60
INTENDED USE: PIPE SIZING BETWEEN POINT OF DELIVERY AND THE HOUSE LINE REGULATOR. TOTAL LOAD SUPPLIED BY A SINGLE HOUSE LINE REGULATOR NOT EXCEEDING 150 CUBIC FEET PER HOUR2.
		TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)
NOMINAL:	K & L:	1⁄4	3⁄8	1⁄2	5⁄8	3⁄4	1	11⁄4	11⁄2	2
NOMINAL:	ACR:	3⁄8	1⁄2	5⁄8	3⁄4	7⁄8	11⁄8	13⁄8	–	–
OUTSIDE:	OUTSIDE:	0.375	0.500	0.625	0.750	0.875	1.125	1.375	1.625	2.125
INSIDE:1	INSIDE:1	0.305	0.402	0.527	0.652	0.745	0.995	1.245	1.481	1.959
LENGTH (feet)	LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10 20 30 40 50	10 20 30 40 50	303 208 167 143 127	625 430 345 295 262	1270 874 702 601 532	2220 1530 1230 1050 931	3150 2170 1740 1490 1320	6740 4630 3720 3180 2820	12 100 8330 6690 5730 5080	19 100 13 100 10 600 9030 8000	39 800 27 400 22 000 18 800 16 700
60 70 80 90 100	60 70 80 90 100	115 106 98 92 87	237 218 203 190 180	482 444 413 387 366	843 776 722 677 640	1200 1100 1020 961 907	2560 2350 2190 2050 1940	4600 4230 3940 3690 3490	7250 6670 6210 5820 5500	15 100 13 900 12 900 12 100 11 500
125 150 175 200 250	125 150 175 200 250	77 70 64 60 53	159 144 133 124 110	324 294 270 252 223	567 514 472 440 390	804 729 670 624 553	1720 1560 1430 1330 1180	3090 2800 2580 2400 2130	4880 4420 4060 3780 3350	10 200 9200 8460 7870 6980
300 350 400 450 500	300 350 400 450 500	48 44 41 39 36	99 91 85 80 75	202 186 173 162 153	353 325 302 283 268	501 461 429 402 380	1070 984 916 859 811	1930 1770 1650 1550 1460	3040 2790 2600 2440 2300	6320 5820 5410 5080 4800
550 600 650 700 750	550 600 650 700 750	35 33 32 30 29	72 68 65 63 60	146 139 133 128 123	254 243 232 223 215	361 344 330 317 305	771 735 704 676 652	1390 1320 1270 1220 1170	2190 2090 2000 1920 1850	4560 4350 4160 4000 3850
800 850 900 950 1000	800 850 900 950 1000	28 27 27 26 25	58 57 55 53 52	119 115 111 108 105	208 201 195 189 184	295 285 276 268 261	629 609 590 573 558	1130 1100 1060 1030 1000	1790 1730 1680 1630 1580	3720 3600 3490 3390 3300

TABLE 1315.2(12) SEMI-RIGID COPPER TUBING [NFPA 54: TABLE 6.2.1(m)]3

1100 1200 1300 1400 1500	1100 1200 1300 1400 1500	24 23 22 21 20	49 47 45 43 42	100 95 91 88 85	175 167 160 153 148	248 237 227 218 210	530 505 484 465 448	954 910 871 837 806	1500 1430 1370 1320 1270	3130 2990 2860 2750 2650
1600 1700 1800 1900 2000	1600 1700 1800 1900 2000	19 19 18 18 17	40 39 38 37 36	82 79 77 74 72	143 138 134 130 126	202 196 190 184 179	432 419 406 394 383	779 753 731 709 690	1230 1190 1150 1120 1090	2560 2470 2400 2330 2270

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa Notes: 1 Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.

2 Where this table is used to size the tubing upstream of a line pressure regulator, the pipe or tubing downstream of the line pressure regulator shall be sized using a pressure drop no greater than 1 inch water column (0.249 kPa).

3 Table entries are rounded to 3 significant digits.

308 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(13) SEMI-RIGID COPPER TUBING [NFPA 54: TABLE 6.2.1(n)]2

							GAS:	GAS:	NATURAL	NATURAL
							INLET PRESSURE:	INLET PRESSURE:	5.0 psi	5.0 psi
							PRESSURE DROP:	PRESSURE DROP:	3.5 psi	3.5 psi
							SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60
		TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)
NOMINAL:	K & L:	1⁄4	3⁄8	1⁄2	5⁄8	3⁄4	1	11⁄4	11⁄2	2
NOMINAL:	ACR:	3⁄8	1⁄2	5⁄8	3⁄4	7⁄8	11⁄8	13⁄8	–	–
OUTSIDE:	OUTSIDE:	0.375	0.500	0.625	0.750	0.875	1.125	1.375	1.625	2.125
INSIDE:1	INSIDE:1	0.305	0.402	0.527	0.652	0.745	0.995	1.245	1.481	1.959
LENGTH (feet)	LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10 20 30 40 50	10 20 30 40 50	511 351 282 241 214	1050 724 582 498 441	2140 1470 1180 1010 898	3750 2580 2070 1770 1570	5320 3650 2930 2510 2230	11 400 7800 6270 5360 4750	20 400 14 000 11 300 9660 8560	32 200 22 200 17 800 15 200 13 500	67 100 46 100 37 000 31 700 28 100
60 70 80 90 100	60 70 80 90 100	194 178 166 156 147	400 368 342 321 303	813 748 696 653 617	1420 1310 1220 1140 1080	2020 1860 1730 1620 1530	4310 3960 3690 3460 3270	7750 7130 6640 6230 5880	12 200 11 200 10 500 9820 9270	25 500 23 400 21 800 20 400 19 300
125 150 175 200 250	125 150 175 200 250	130 118 109 101 90	269 243 224 208 185	547 495 456 424 376	955 866 796 741 657	1360 1230 1130 1050 932	2900 2620 2410 2250 1990	5210 4720 4350 4040 3580	8220 7450 6850 6370 5650	17 100 15 500 14 300 13 300 11 800
300 350 400 450 500	300 350 400 450 500	81 75 69 65 62	167 154 143 134 127	340 313 291 273 258	595 547 509 478 451	844 777 722 678 640	1800 1660 1540 1450 1370	3250 2990 2780 2610 2460	5120 4710 4380 4110 3880	10 700 9810 9120 8560 8090
550 600 650 700 750	550 600 650 700 750	58 56 53 51 49	121 115 110 106 102	245 234 224 215 207	429 409 392 376 362	608 580 556 534 514	1300 1240 1190 1140 1100	2340 2230 2140 2050 1980	3690 3520 3370 3240 3120	7680 7330 7020 6740 6490
800 850 900 950 1000	800 850 900 950 1000	48 46 45 43 42	98 95 92 90 87	200 194 188 182 177	350 339 328 319 310	497 481 466 452 440	1060 1030 1000 967 940	1910 1850 1790 1740 1690	3010 2910 2820 2740 2670	6270 6070 5880 5710 5560
1100 1200 1300 1400 1500	1100 1200 1300 1400 1500	40 38 37 35 34	83 79 76 73 70	169 161 154 148 143	295 281 269 259 249	418 399 382 367 353	893 852 816 784 755	1610 1530 1470 1410 1360	2530 2420 2320 2220 2140	5280 5040 4820 4630 4460
1600 1700 1800 1900 2000	1600 1700 1800 1900 2000	33 32 31 30 29	68 65 63 62 60	138 133 129 125 122	241 233 226 219 213	341 330 320 311 302	729 705 684 664 646	1310 1270 1230 1200 1160	2070 2000 1940 1890 1830	4310 4170 4040 3930 3820

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa

Notes : 1 Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.

2 Table entries are rounded to 3 significant digits.

FUEL GAS PIPING

TABLE 1315.2(14) CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54: TABLE 6.2.1(o)]1, 2									2
									GAS:	GAS:	GAS:	NATURAL	NATURAL	NATURAL
									INLET PRESSURE:	INLET PRESSURE:	INLET PRESSURE:	LESS THAN 2 psi	LESS THAN 2 psi	LESS THAN 2 psi
									PRESSURE DROP:	PRESSURE DROP:	PRESSURE DROP:	0.5 in. w.c.	0.5 in. w.c.	0.5 in. w.c.
									SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60	0.60
	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3
FLOW DESIGNATION:	13	15	18	19	23	25	30	31	37	39	46	48	60	62
LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
5 10 15 20 25	46 32 25 22 19	63 44 35 31 27	115 82 66 58 52	134 95 77 67 60	225 161 132 116 104	270 192 157 137 122	471 330 267 231 206	546 383 310 269 240	895 639 524 456 409	1037 746 615 536 482	1790 1260 1030 888 793	2070 1470 1200 1050 936	3660 2600 2140 1850 1660	4140 2930 2400 2080 1860
30 40 50 60	18 15 13 12	25 21 19 17	47 41 37 34	55 47 42 38	96 83 75 68	112 97 87 80	188 162 144 131	218 188 168 153	374 325 292 267	442 386 347 318	723 625 559 509	856 742 665 608	1520 1320 1180 1080	1700 1470 1320 1200
70 80 90 100	11 10 10 9	16 15 14 13	31 29 28 26	36 33 32 30	63 60 57 54	74 69 65 62	121 113 107 101	141 132 125 118	248 232 219 208	295 277 262 249	471 440 415 393	563 527 498 472	1000 940 887 843	1110 1040 983 933
150 200 250 300	7 6 5 5	10 9 8 7	20 18 16 15	23 21 19 17	42 38 34 32	48 44 39 36	78 71 63 57	91 82 74 67	171 148 133 95	205 179 161 148	320 277 247 226	387 336 301 275	691 600 538 492	762 661 591 540

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPa

equivalent length of tubing to the following equation: L = 1.3 n, where L is additional length (ft) of tubing and n is the number of additional fittings, bends, or both . 3 EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD,

the greater the gas capacity of the tubing.

310 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(15) CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54: TABLE 6.2.1(p)]1								1, 2
								GAS:	GAS:	GAS:	GAS:	NATURAL	NATURAL	NATURAL
								INLET PRESSURE:	INLET PRESSURE:	INLET PRESSURE:	INLET PRESSURE:	LESS THAN 2 psi	LESS THAN 2 psi	LESS THAN 2 psi
								PRESSURE DROP:	PRESSURE DROP:	PRESSURE DROP:	PRESSURE DROP:	3.0 in. w.c.	3.0 in. w.c.	3.0 in. w.c.
								SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60	0.60
INTENDED USE: INITIAL SUPPLY PRESSURE OF 8.0 INCH WATER COLUMN OR GREATER
	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3
FLOW DESIGNATION:	13	15	18	19	23	25	30	31	37	39	46	48	60	62
LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
5 10 15 20 25	120 83 67 57 51	160 112 90 78 69	277 197 161 140 125	327 231 189 164 147	529 380 313 273 245	649 462 379 329 295	1180 828 673 580 518	1370 958 778 672 599	2140 1530 1250 1090 978	2423 1740 1433 1249 1123	4430 3200 2540 2200 1960	5010 3560 2910 2530 2270	8800 6270 5140 4460 4000	10 100 7160 5850 5070 4540
30 40 50 60	46 39 35 32	63 54 48 44	115 100 89 82	134 116 104 95	225 196 176 161	270 234 210 192	471 407 363 330	546 471 421 383	895 778 698 639	1029 897 806 739	1790 1550 1380 1260	2070 1800 1610 1470	3660 3180 2850 2600	4140 3590 3210 2930
70 80 90 100	29 27 26 24	41 38 36 34	76 71 67 63	88 82 77 73	150 141 133 126	178 167 157 149	306 285 268 254	355 331 311 295	593 555 524 498	686 644 609 579	1170 1090 1030 974	1360 1280 1200 1140	2420 2260 2140 2030	2720 2540 2400 2280
150 200 250 300	19 17 15 13	27 23 21 19	52 45 40 37	60 52 46 42	104 91 82 75	122 106 95 87	206 178 159 144	240 207 184 168	409 355 319 234	477 415 373 342	793 686 613 559	936 812 728 665	1660 1440 1290 1180	1860 1610 1440 1320

For SI units: 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPa

the greater the gas capacity of the tubing.

FUEL GAS PIPING

TABLE 1315.2(16) CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54: TABLE 6.2.1(q)]1								1, 2
								GAS:	GAS:	GAS:	GAS:	NATURAL	NATURAL	NATURAL
								INLET PRESSURE:	INLET PRESSURE:	INLET PRESSURE:	INLET PRESSURE:	LESS THAN 2 psi	LESS THAN 2 psi	LESS THAN 2 psi
								PRESSURE DROP:	PRESSURE DROP:	PRESSURE DROP:	PRESSURE DROP:	6.0 in. w.c.	6.0 in. w.c.	6.0 in. w.c.
								SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60	0.60
INTENDED USE: INITIAL SUPPLY PRESSURE OF 11.0 INCH WATER COLUMN OR GREATER
	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3
FLOW DESIGNATION:	13	15	18	19	23	25	30	31	37	39	46	48	60	62
LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
5 10 15 20 25	173 120 96 83 74	229 160 130 112 99	389 277 227 197 176	461 327 267 231 207	737 529 436 380 342	911 649 532 462 414	1690 1180 960 828 739	1950 1370 1110 958 855	3000 2140 1760 1530 1370	3375 2423 1996 1740 1564	6280 4430 3610 3120 2790	7050 5010 4100 3560 3190	12 400 8800 7210 6270 5620	14 260 10 100 8260 7160 6400
30 40 50 60	67 57 51 46	90 78 69 63	161 140 125 115	189 164 147 134	313 273 245 225	379 329 295 270	673 580 518 471	778 672 599 546	1250 1090 978 895	1433 1249 1123 1029	2540 2200 1960 1790	2910 2530 2270 2070	5140 4460 4000 3660	5850 5070 4540 4140
70 80 90 100	42 39 37 35	58 54 51 48	106 100 94 89	124 116 109 104	209 196 185 176	250 234 221 210	435 407 383 363	505 471 444 421	830 778 735 698	956 897 848 806	1660 1550 1460 1380	1920 1800 1700 1610	3390 3180 3000 2850	3840 3590 3390 3210
150 200 250 300	28 24 21 19	39 34 30 27	73 63 57 52	85 73 66 60	145 126 114 104	172 149 134 122	294 254 226 206	342 295 263 240	573 498 447 409	664 579 520 477	1130 974 870 793	1320 1140 1020 936	2340 2030 1820 1660	2630 2280 2040 1860

For SI units: 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPa

Notes: 1 Table entries are rounded to 3 significant digits. 2 Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, fittings, or both shall be increased by an equiv alent length of tubing to the following equation: L = 1.3 n, where L is additional length (ft) of tubing and n is the number of additional fittings, bends, or both . 3 EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the

greater the gas capacity of the tubing.

312 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(17) CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54: TABLE 6.2.1(r)]1, 2									2, 3, 4
									GAS:	GAS:	GAS:	NATURAL	NATURAL	NATURAL
									INLET PRESSURE:	INLET PRESSURE:	INLET PRESSURE:	2.0 psi	2.0 psi	2.0 psi
									PRESSURE DROP:	PRESSURE DROP:	PRESSURE DROP:	1.0 psi	1.0 psi	1.0 psi
									SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60	0.60
	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5
FLOW DESIGNATION:	13	15	18	19	23	25	30	31	37	39	46	48	60	62
LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10 25 30 40 50	270 166 151 129 115	353 220 200 172 154	587 374 342 297 266	700 444 405 351 314	1100 709 650 567 510	1370 876 801 696 624	2590 1620 1480 1270 1140	2990 1870 1700 1470 1310	4510 2890 2640 2300 2060	5037 3258 2987 2605 2343	9600 6040 5510 4760 4260	10 700 6780 6200 5380 4820	18 600 11 900 10 900 9440 8470	21 600 13 700 12 500 10 900 9720
75 80 100 150 200	93 89 79 64 55	124 120 107 87 75	218 211 189 155 135	257 249 222 182 157	420 407 366 302 263	512 496 445 364 317	922 892 795 646 557	1070 1030 920 748 645	1690 1640 1470 1210 1050	1932 1874 1685 1389 1212	3470 3360 3000 2440 2110	3950 3820 3420 2800 2430	6940 6730 6030 4940 4290	7940 7690 6880 5620 4870
250 300 400 500	49 44 38 34	67 61 52 46	121 110 96 86	141 129 111 100	236 217 189 170	284 260 225 202	497 453 390 348	576 525 453 404	941 862 749 552	1090 999 871 783	1890 1720 1490 1330	2180 1990 1730 1550	3850 3520 3060 2740	4360 3980 3450 3090

For SI units: 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa

Notes: 1 Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 0.75 psi (5.17 kPa), DO NOT USE THIS TABLE. Con sult with regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator are capable of varying with flow rate. 2 CAUTION: Capacities shown in table are capable of exceeding maximum capacity for a selected regulator. Consult with regulator or tubing manufacturer

for guidance. 3 Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, fittings, or both shall be increased

by an equivalent length of tubing according to the following equation: L = 1.3 n, where L is additional length (ft) of tubing and n is the number of additional

fittings, bends, or both. 4 Table entries are rounded to 3 significant digits. 5 EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD,

the greater the gas capacity of the tubing.

FUEL GAS PIPING

TABLE 1315.2(18) CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54: TABLE 6.2.1(s)]1, 2,									, 3, 4
									GAS:	GAS:	GAS:	NATURAL	NATURAL	NATURAL
									INLET PRESSURE:	INLET PRESSURE:	INLET PRESSURE:	5.0 psi	5.0 psi	5.0 psi
									PRESSURE DROP:	PRESSURE DROP:	PRESSURE DROP:	3.5 psi	3.5 psi	3.5 psi
									SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60	0.60
	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5
FLOW DESIGNATION:	13	15	18	19	23	25	30	31	37	39	46	48	60	62
LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10 25 30 40 50	523 322 292 251 223	674 420 382 329 293	1080 691 632 549 492	1300 827 755 654 586	2000 1290 1180 1030 926	2530 1620 1480 1280 1150	4920 3080 2800 2420 2160	5660 3540 3230 2790 2490	8300 5310 4860 4230 3790	9140 5911 5420 4727 4251	18 100 11 400 10 400 8970 8020	19 800 12 600 11 500 10 000 8930	34 400 22 000 20 100 17 400 15 600	40 400 25 600 23 400 20 200 18 100
75 80 100 150 200	180 174 154 124 107	238 230 205 166 143	403 391 350 287 249	479 463 415 339 294	763 740 665 548 478	944 915 820 672 584	1750 1690 1510 1230 1060	2020 1960 1740 1420 1220	3110 3020 2710 2220 1930	3506 3400 3057 2521 2199	6530 6320 5650 4600 3980	7320 7090 6350 5200 4510	12 800 12 400 11 100 9130 7930	14 800 14 300 12 800 10 500 9090
250 300 400 500	95 86 74 66	128 116 100 89	223 204 177 159	263 240 208 186	430 394 343 309	524 479 416 373	945 860 742 662	1090 995 858 766	1730 1590 1380 1040	1977 1813 1581 1422	3550 3240 2800 2500	4040 3690 3210 2870	7110 6500 5650 5060	8140 7430 6440 5760

For SI units: 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa

Notes: 1 Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 1 psi ( 7 kPa), DO NOT USE THIS TABLE. Consult with reg ulator manufacturer for pressure drops and capacity factors. Pressure drops across regulator are capable of varying with the flow rate. 2 CAUTION: Capacities shown in table are capable of exceeding the maximum capacity of selected regulator. Consult tubing manufacturer for guidance. 3 Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, fittings, or both shall be increased by an equiva lent length of tubing to the following equation: L = 1.3 n, where L is additional length (feet) of tubing and n is the number of additional fittings, bends, or both. 4 Table entries are rounded to 3 significant digits. 5 EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the

greater the gas capacity of the tubing.

314 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(19) POLYETHYLENE PLASTIC PIPE [NFPA 54: TABLE 6.2.1(t)]*

					GAS:	GAS:	NATURAL	NATURAL
					INLET PRESSURE:	INLET PRESSURE:	LESS THAN 2 psi	LESS THAN 2 psi
					PRESSURE DROP:	PRESSURE DROP:	0.3 in. w.c.	0.3 in. w.c.
					SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60
	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)
NOMINAL OD:	1⁄2	3⁄4	1	1 1⁄4	1 1⁄2	2	3	4
DESIGNATION:	SDR 9.3	SDR 11	SDR 11	SDR 10	SDR 11	SDR 11	SDR 11	SDR 11
ACTUAL ID:	0.660	0.860	1.077	1.328	1.554	1.943	2.864	3.682
LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10	153	305	551	955	1440	2590	7170	13 900
20	105	210	379	656	991	1780	4920	9520
30	84	169	304	527	796	1430	3950	7640
40	72	144	260	451	681	1220	3380	6540
50	64	128	231	400	604	1080	3000	5800
60	58	116	209	362	547	983	2720	5250
70	53	107	192	333	503	904	2500	4830
80	50	99	179	310	468	841	2330	4500
90	46	93	168	291	439	789	2180	4220
100	44	88	159	275	415	745	2060	3990
125	39	78	141	243	368	661	1830	3530
150	35	71	127	221	333	598	1660	3200
175	32	65	117	203	306	551	1520	2940
200	30	60	109	189	285	512	1420	2740
250	27	54	97	167	253	454	1260	2430
300	24	48	88	152	229	411	1140	2200
350	22	45	81	139	211	378	1050	2020
400	21	42	75	130	196	352	974	1880
450	19	39	70	122	184	330	914	1770
500	18	37	66	115	174	312	863	1670

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPa - Table entries are rounded to 3 significant digits.

FUEL GAS PIPING

TABLE 1315.2(20) POLYETHYLENE PLASTIC PIPE [NFPA 54: TABLE 6.2.1(u)]*

					GAS:	GAS:	NATURAL	NATURAL
					INLET PRESSURE:	INLET PRESSURE:	LESS THAN 2 psi	LESS THAN 2 psi
					PRESSURE DROP:	PRESSURE DROP:	0.5 in. w.c.	0.5 in. w.c.
					SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60
	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)
NOMINAL OD:	1⁄2	3⁄4	1	1 1⁄4	1 1⁄2	2	3	4
DESIGNATION:	SDR 9.3	SDR 11	SDR 11	SDR 10	SDR 11	SDR 11	SDR 11	SDR 11
ACTUAL ID:	0.660	0.860	1.077	1.328	1.554	1.943	2.864	3.682
LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10	201	403	726	1260	1900	3410	9450	18 260
20	138	277	499	865	1310	2350	6490	12 550
30	111	222	401	695	1050	1880	5210	10 080
40	95	190	343	594	898	1610	4460	8630
50	84	169	304	527	796	1430	3950	7640
60	76	153	276	477	721	1300	3580	6930
70	70	140	254	439	663	1190	3300	6370
80	65	131	236	409	617	1110	3070	5930
90	61	123	221	383	579	1040	2880	5560
100	58	116	209	362	547	983	2720	5250
125	51	103	185	321	485	871	2410	4660
150	46	93	168	291	439	789	2180	4220
175	43	86	154	268	404	726	2010	3880
200	40	80	144	249	376	675	1870	3610
250	35	71	127	221	333	598	1660	3200
300	32	64	115	200	302	542	1500	2900
350	29	59	106	184	278	499	1380	2670
400	27	55	99	171	258	464	1280	2480
450	26	51	93	160	242	435	1200	2330
500	24	48	88	152	229	411	1140	2200

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPa

Table entries are rounded to 3 significant digits.

316 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(21) POLYETHYLENE PLASTIC PIPE [NFPA 54: TABLE 6.2.1(v)]*

					GAS:	GAS:	NATURAL	NATURAL
					INLET PRESSURE:	INLET PRESSURE:	2.0 psi	2.0 psi
					PRESSURE DROP:	PRESSURE DROP:	1.0 psi	1.0 psi
					SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	0.60	0.60
	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)
NOMINAL OD:	1⁄2	3⁄4	1	1 1⁄4	1 1⁄2	2	3	4
DESIGNATION:	SDR 9.3	SDR 11	SDR 11	SDR 10	SDR 11	SDR 11	SDR 11	SDR 11
ACTUAL ID:	0.660	0.860	1.077	1.328	1.554	1.943	2.864	3.682
LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10	1860	3720	6710	11 600	17 600	31 600	87 300	169 000
20	1280	2560	4610	7990	12 100	21 700	60 000	116 000
30	1030	2050	3710	6420	9690	17 400	48 200	93 200
40	878	1760	3170	5490	8300	14 900	41 200	79 700
50	778	1560	2810	4870	7350	13 200	36 600	70 700
60	705	1410	2550	4410	6660	12 000	33 100	64 000
70	649	1300	2340	4060	6130	11 000	30 500	58 900
80	603	1210	2180	3780	5700	10 200	28 300	54 800
90	566	1130	2050	3540	5350	9610	26 600	51 400
100	535	1070	1930	3350	5050	9080	25 100	48 600
125	474	949	1710	2970	4480	8050	22 300	43 000
150	429	860	1550	2690	4060	7290	20 200	39 000
175	395	791	1430	2470	3730	6710	18 600	35 900
200	368	736	1330	2300	3470	6240	17 300	33 400
250	326	652	1180	2040	3080	5530	15 300	29 600
300	295	591	1070	1850	2790	5010	13 900	26 800
350	272	544	981	1700	2570	4610	12 800	24 700
400	253	506	913	1580	2390	4290	11 900	22 900
450	237	475	856	1480	2240	4020	11 100	21 500
500	224	448	809	1400	2120	3800	10 500	20 300
550	213	426	768	1330	2010	3610	9990	19 300
600	203	406	733	1270	1920	3440	9530	18 400
650	194	389	702	1220	1840	3300	9130	17 600
700	187	374	674	1170	1760	3170	8770	16 900
750	180	360	649	1130	1700	3050	8450	16 300
800	174	348	627	1090	1640	2950	8160	15 800
850	168	336	607	1050	1590	2850	7890	15 300
900	163	326	588	1020	1540	2770	7650	14 800
950	158	317	572	990	1500	2690	7430	14 400
1000	154	308	556	963	1450	2610	7230	14 000
1100	146	293	528	915	1380	2480	6870	13 300
1200	139	279	504	873	1320	2370	6550	12 700
1300	134	267	482	836	1260	2270	6270	12 100
1400	128	257	463	803	1210	2180	6030	11 600
1500	124	247	446	773	1170	2100	5810	11 200
1600	119	239	431	747	1130	2030	5610	10 800
1700	115	231	417	723	1090	1960	5430	10 500
1800	112	224	404	701	1060	1900	5260	10 200
1900	109	218	393	680	1030	1850	5110	9900
2000	106	212	382	662	1000	1800	4970	9600

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa - Table entries are rounded to 3 significant digits.

FUEL GAS PIPING

TABLE 1315.2(22) POLYETHYLENE PLASTIC TUBING [NFPA 54: TABLE 6.2.1(w)] [2, 3]

TABLE 1315.2(23) POLYETHYLENE PLASTIC TUBING [NFPA 54: TABLE 6.2.1(x)] [2, 3]

350 NA 54 350 10 72

400 NA 51 400 NA 67

450 NA 47 450 NA 63

500 NA 45 500 NA 59

	GAS:	NATURAL
	INLET PRESSURE:	LESS THAN 2.0 psi
	PRESSURE DROP:	0.3 in. w.c.
	SPECIFIC GRAVITY:	0.60
	PLASTIC TUBING SIZE (CTS)1 (inch)	PLASTIC TUBING SIZE (CTS)1 (inch)
NOMINAL OD:	1⁄2	1
DESIGNATION:	SDR 7	SDR 11
ACTUAL ID:	0.445	0.927
LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10 20 30 40 50	54 37 30 26 23	372 256 205 176 156
60 70 80 90 100	21 19 18 17 16	141 130 121 113 107
125 150 175 200	14 13 12 11	95 86 79 74
225 250 275 300	10 NA NA NA	69 65 62 59
350 400 450 500	NA NA NA NA	54 51 47 45

	GAS:	NATURAL
	INLET PRESSURE:	LESS THAN 2.0 psi
	PRESSURE DROP:	0.5 in. w.c.
	SPECIFIC GRAVITY:	0.60
	PLASTIC TUBING SIZE (CTS)1 (inch)	PLASTIC TUBING SIZE (CTS)1 (inch)
NOMINAL OD:	1⁄2	1
DESIGNATION:	SDR 7	SDR 11
ACTUAL ID:	0.445	0.927
LENGTH (feet)	CAPACITY IN CUBIC FEET OF GAS PER HOUR	CAPACITY IN CUBIC FEET OF GAS PER HOUR
10 20 30 40 50	72 49 39 34 30	490 337 271 232 205
60 70 80 90 100	27 25 23 22 21	186 171 159 149 141
125 150 175 200	18 17 15 14	125 113 104 97
225 250 275 300	13 12 11 11	91 86 82 78
350 400 450 500	10 NA NA NA	72 67 63 59

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283m [3] /h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column 0.0283m [3] /h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column

= 0.249 kPa = 0.249 kPa

Notes: Notes: 1 CTS = Copper tube size. 1 CTS = Copper tube size. 2 Table entries are rounded to 3 significant digits. 2 Table entries are rounded to 3 significant digits. 3 NA means a flow of less than 10 ft 3 /h (0.283 m 3 /h). 3 NA means a flow of less than 10 ft 3 /h (0.283 m 3 /h).

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283m [3] /h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column

= 0.249 kPa

Notes: 1 CTS = Copper tube size. 2 Table entries are rounded to 3 significant digits. 3 NA means a flow of less than 10 ft 3 /h (0.283 m 3 /h).

318 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(24) SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.3.1(a)]*

						GAS:	GAS:	UNDILUTED PROPANE	UNDILUTED PROPANE
						INLET PRESSURE:	INLET PRESSURE:	10.0 psi	10.0 psi
						PRESSURE DROP:	PRESSURE DROP:	1.0 psi	1.0 psi
						SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	1.50	1.50
INTENDED USE: PIPE SIZING BETWEEN FIRST STAGE (HIGH PRESSURE) REGULATOR AND SECOND STAGE (LOW PRESSURE) REGULATOR
	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)
NOMINAL INSIDE:	1⁄2	3⁄4	1	11⁄4	11⁄2	2	21⁄2	3	4
ACTUAL:	0.622	0.824	1.049	1.380	1.610	2.067	2.469	3.068	4.026
LENGTH (feet)	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR
10 20 30 40 50	3320 2280 1830 1570 1390	6950 4780 3840 3280 2910	13 100 9000 7220 6180 5480	26 900 18 500 14 800 12 700 11 300	40 300 27 700 22 200 19 000 16 900	77 600 53 300 42 800 36 600 32 500	124 000 85 000 68 200 58 400 51 700	219 000 150 000 121 000 103 000 91 500	446 000 306 000 246 000 211 000 187 000
60 70 80 90 100	1260 1160 1080 1010 956	2640 2430 2260 2120 2000	4970 4570 4250 3990 3770	10 200 9380 8730 8190 7730	15 300 14 100 13 100 12 300 11 600	29 400 27 100 25 200 23 600 22 300	46 900 43 100 40 100 37 700 35 600	82 900 76 300 70 900 66 600 62 900	169 000 156 000 145 000 136 000 128 000
125 150 175 200 250	848 768 706 657 582	1770 1610 1480 1370 1220	3340 3020 2780 2590 2290	6850 6210 5710 5320 4710	10 300 9300 8560 7960 7060	19 800 17 900 16 500 15 300 13 600	31 500 28 600 26 300 24 400 21 700	55 700 50 500 46 500 43 200 38 300	114 000 103 000 94 700 88 100 78 100
300 350 400 450 500	528 486 452 424 400	1100 1020 945 886 837	2080 1910 1780 1670 1580	4270 3930 3650 3430 3240	6400 5880 5470 5140 4850	12 300 11 300 10 500 9890 9340	19 600 18 100 16 800 15 800 14 900	34 700 31 900 29 700 27 900 26 300	70 800 65 100 60 600 56 800 53 700
550 600 650 700 750	380 363 347 334 321	795 759 726 698 672	1500 1430 1370 1310 1270	3070 2930 2810 2700 2600	4610 4400 4210 4040 3900	8870 8460 8110 7790 7500	14 100 13 500 12 900 12 400 12 000	25 000 23 900 22 800 21 900 21 100	51 000 48 600 46 600 44 800 43 100
800 850 900 950 1000	310 300 291 283 275	649 628 609 592 575	1220 1180 1150 1110 1080	2510 2430 2360 2290 2230	3760 3640 3530 3430 3330	7240 7010 6800 6600 6420	11 500 11 200 10 800 10 500 10 200	20 400 19 800 19 200 18 600 18 100	41 600 40 300 39 100 37 900 36 900
1100 1200 1300 1400 1500	261 249 239 229 221	546 521 499 480 462	1030 982 940 903 870	2110 2020 1930 1850 1790	3170 3020 2890 2780 2680	6100 5820 5570 5350 5160	9720 9270 8880 8530 8220	17 200 16 400 15 700 15 100 14 500	35 000 33 400 32 000 30 800 29 600
1600 1700 1800 1900 2000	213 206 200 194 189	446 432 419 407 395	840 813 789 766 745	1730 1670 1620 1570 1530	2590 2500 2430 2360 2290	4980 4820 4670 4540 4410	7940 7680 7450 7230 7030	14 000 13 600 13 200 12 800 12 400	28 600 27 700 26 900 26 100 25 400

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.8947 kPa

Table entries are rounded to 3 significant digits.

FUEL GAS PIPING

TABLE 1315.2(25) SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.3.1(b)]*

						GAS:	GAS:	UNDILUTED PROPANE	UNDILUTED PROPANE
						INLET PRESSURE:	INLET PRESSURE:	10.0 psi	10.0 psi
						PRESSURE DROP:	PRESSURE DROP:	3.0 psi	3.0 psi
						SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	1.50	1.50
INTENDED USE: PIPE SIZING BETWEEN FIRST STAGE (HIGH PRESSURE) REGULATOR AND SECOND STAGE (LOW PRESSURE) REGULATOR
	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)
NOMINAL INSIDE:	1⁄2	3⁄4	1	11⁄4	11⁄2	2	21⁄2	3	4
ACTUAL:	0.622	0.824	1.049	1.380	1.610	2.067	2.469	3.068	4.026
LENGTH (feet)	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR
10 20 30 40 50	5890 4050 3250 2780 2460	12 300 8460 6790 5810 5150	23 200 15 900 12 800 11 000 9710	47 600 32 700 26 300 22 500 19 900	71 300 49 000 39 400 33 700 29 900	137 000 94 400 75 800 64 900 57 500	219 000 150 000 121 000 103 000 91 600	387 000 266 000 214 000 183 000 162 000	789 000 543 000 436 000 373 000 330 000
60 70 80 90 100	2230 2050 1910 1790 1690	4670 4300 4000 3750 3540	8790 8090 7530 7060 6670	18 100 16 600 15 500 14 500 13 700	27 100 24 900 23 200 21 700 20 500	52 100 47 900 44 600 41 800 39 500	83 000 76 400 71 100 66 700 63 000	147 000 135 000 126 000 118 000 111 000	299 000 275 000 256 000 240 000 227 000
125 150 175 200 250	1500 1360 1250 1160 1030	3140 2840 2620 2430 2160	5910 5360 4930 4580 4060	12 100 11 000 10 100 9410 8340	18 200 16 500 15 200 14 100 12 500	35 000 31 700 29 200 27 200 24 100	55 800 50 600 46 500 43 300 38 400	98 700 89 400 82 300 76 500 67 800	201 000 182 000 167 800 156 100 138 400
300 350 400 450 500	935 860 800 751 709	1950 1800 1670 1570 1480	3680 3390 3150 2960 2790	7560 6950 6470 6070 5730	11 300 10 400 9690 9090 8590	21 800 20 100 18 700 17 500 16 500	34 800 32 000 29 800 27 900 26 400	61 500 56 500 52 600 49 400 46 600	125 400 115 300 107 300 100 700 95 100
550 600 650 700 750	673 642 615 591 569	1410 1340 1290 1240 1190	2650 2530 2420 2330 2240	5450 5200 4980 4780 4600	8160 7780 7450 7160 6900	15 700 15 000 14 400 13 800 13 300	25 000 23 900 22 900 22 000 21 200	44 300 42 200 40 500 38 900 37 400	90 300 86 200 82 500 79 300 76 400
800 850 900 950 1000	550 532 516 501 487	1150 1110 1080 1050 1020	2170 2100 2030 1970 1920	4450 4300 4170 4050 3940	6660 6450 6250 6070 5900	12 800 12 400 12 000 11 700 11 400	20 500 19 800 19 200 18 600 18 100	36 200 35 000 33 900 32 900 32 000	73 700 71 400 69 200 67 200 65 400
1100 1200 1300 1400 1500	463 442 423 406 391	968 923 884 849 818	1820 1740 1670 1600 1540	3740 3570 3420 3280 3160	5610 5350 5120 4920 4740	10 800 10 300 9870 9480 9130	17 200 16 400 15 700 15 100 14 600	30 400 29 000 27 800 26 700 25 700	62 100 59 200 56 700 54 500 52 500
1600 1700 1800 1900 2000	378 366 355 344 335	790 765 741 720 700	1490 1440 1400 1360 1320	3060 2960 2870 2780 2710	4580 4430 4300 4170 4060	8820 8530 8270 8040 7820	14 100 13 600 13 200 12 800 12 500	24 800 24 000 23 300 22 600 22 000	50 700 49 000 47 600 46 200 44 900

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.8947 kPa

Table entries are rounded to 3 significant digits.

320 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(26) SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.3.1(c)]*

						GAS:	GAS:	UNDILUTED PROPANE	UNDILUTED PROPANE
						INLET PRESSURE:	INLET PRESSURE:	2.0 psi	2.0 psi
						PRESSURE DROP:	PRESSURE DROP:	1.0 psi	1.0 psi
						SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	1.50	1.50
INTENDED USE: PIPE SIZING BETWEEN 2 PSIG SERVICE AND LINE PRESSURE REGULATOR
	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)
NOMINAL:	1⁄2	3⁄4	1	11⁄4	11⁄2	2	21⁄2	3	4
ACTUAL ID:	0.622	0.824	1.049	1.380	1.610	2.067	2.469	3.068	4.026
LENGTH (feet)	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR
10 20 30 40 50	2680 1840 1480 1260 1120	5590 3850 3090 2640 2340	10 500 7240 5820 4980 4410	21 600 14 900 11 900 10 200 9060	32 400 22 300 17 900 15 300 13 600	62 400 42 900 34 500 29 500 26 100	99 500 68 400 54 900 47 000 41 700	176 000 121 000 97 100 83 100 73 700	359 000 247 000 198 000 170 000 150 000
60 70 80 90 100	1010 934 869 815 770	2120 1950 1820 1700 1610	4000 3680 3420 3210 3030	8210 7550 7020 6590 6230	12 300 11 300 10 500 9880 9330	23 700 21 800 20 300 19 000 18 000	37 700 34 700 32 300 30 300 28 600	66 700 61 400 57 100 53 600 50 600	136 000 125 000 116 000 109 000 103 000
125 150 175 200 250	682 618 569 529 469	1430 1290 1190 1110 981	2690 2440 2240 2080 1850	5520 5000 4600 4280 3790	8270 7490 6890 6410 5680	15 900 14 400 13 300 12 300 10 900	25 400 23 000 21 200 19 700 17 400	44 900 40 700 37 400 34 800 30 800	91 500 82 900 76 300 71 000 62 900
300 350 400 450 500	425 391 364 341 322	889 817 760 714 674	1670 1540 1430 1340 1270	3440 3160 2940 2760 2610	5150 4740 4410 4130 3910	9920 9120 8490 7960 7520	15 800 14 500 13 500 12 700 12 000	27 900 25 700 23 900 22 400 21 200	57 000 52 400 48 800 45 800 43 200
550 600 650 700 750	306 292 280 269 259	640 611 585 562 541	1210 1150 1100 1060 1020	2480 2360 2260 2170 2090	3710 3540 3390 3260 3140	7140 6820 6530 6270 6040	11 400 10 900 10 400 9990 9630	20 100 19 200 18 400 17 700 17 000	41 100 39 200 37 500 36 000 34 700
800 850 900 950 1000	250 242 235 228 222	523 506 490 476 463	985 953 924 897 873	2020 1960 1900 1840 1790	3030 2930 2840 2760 2680	5830 5640 5470 5310 5170	9300 9000 8720 8470 8240	16 400 15 900 15 400 15 000 14 600	33 500 32 400 31 500 30 500 29 700
1100 1200 1300 1400 1500	210 201 192 185 178	440 420 402 386 372	829 791 757 727 701	1700 1620 1550 1490 1440	2550 2430 2330 2240 2160	4910 4680 4490 4310 4150	7830 7470 7150 6870 6620	13 800 13 200 12 600 12 100 11 700	28 200 26 900 25 800 24 800 23 900
1600 1700 1800 1900 2000	172 166 161 157 152	359 348 337 327 318	677 655 635 617 600	1390 1340 1300 1270 1230	2080 2010 1950 1900 1840	4010 3880 3760 3650 3550	6390 6180 6000 5820 5660	11 300 10 900 10 600 10 300 10 000	23 000 22 300 21 600 21 000 20 400

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.8947 kPa

Table entries are rounded to 3 significant digits.

FUEL GAS PIPING

TABLE 1315.2(27) SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.3.1(d)]*

						GAS:	GAS:	UNDILUTED PROPANE	UNDILUTED PROPANE
						INLET PRESSURE:	INLET PRESSURE:	11.0 in. w.c.	11.0 in. w.c.
						PRESSURE DROP:	PRESSURE DROP:	0.5 in. w.c.	0.5 in. w.c.
						SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	1.50	1.50
INTENDED USE: PIPE SIZING BETWEEN SINGLE- OR SECOND- STAGE (LOW- PRESSURE) REGULATOR AND APPLIANCE.
	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)
NOMINAL INSIDE:	1⁄2	3⁄4	1	11⁄4	11⁄2	2	21⁄2	3	4
ACTUAL:	0.622	0.824	1.049	1.380	1.610	2.067	2.469	3.068	4.026
LENGTH (feet)	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR
10 20 30 40 50	291 200 160 137 122	608 418 336 287 255	1150 787 632 541 480	2350 1620 1300 1110 985	3520 2420 1940 1660 1480	6790 4660 3750 3210 2840	10 800 7430 5970 5110 4530	19 100 13 100 10 600 9030 8000	39 000 26 800 21 500 18 400 16 300
60 70 80 90 100	110 101 94 89 84	231 212 197 185 175	434 400 372 349 330	892 821 763 716 677	1340 1230 1140 1070 1010	2570 2370 2200 2070 1950	4100 3770 3510 3290 3110	7250 6670 6210 5820 5500	14 800 13 600 12 700 11 900 11 200
125 150 175 200 250	74 67 62 58 51	155 140 129 120 107	292 265 243 227 201	600 543 500 465 412	899 814 749 697 618	1730 1570 1440 1340 1190	2760 2500 2300 2140 1900	4880 4420 4060 3780 3350	9950 9010 8290 7710 6840
300 350 400 450 500	46 42 40 37 35	97 89 83 78 73	182 167 156 146 138	373 344 320 300 283	560 515 479 449 424	1080 991 922 865 817	1720 1580 1470 1380 1300	3040 2790 2600 2440 2300	6190 5700 5300 4970 4700
550 600 650 700 750	33 32 30 29 28	70 66 64 61 59	131 125 120 115 111	269 257 246 236 227	403 385 368 354 341	776 741 709 681 656	1240 1180 1130 1090 1050	2190 2090 2000 1920 1850	4460 4260 4080 3920 3770
800 850 900 950 1000	27 26 25 25 24	57 55 53 52 50	107 104 100 97 95	220 213 206 200 195	329 319 309 300 292	634 613 595 578 562	1010 978 948 921 895	1790 1730 1680 1630 1580	3640 3530 3420 3320 3230
1100 1200 1300 1400 1500	23 22 21 20 19	48 46 44 42 40	90 86 82 79 76	185 176 169 162 156	277 264 253 243 234	534 509 487 468 451	850 811 777 746 719	1500 1430 1370 1320 1270	3070 2930 2800 2690 2590
1600 1700 1800 1900 2000	19 18 18 17 17	39 38 37 36 35	74 71 69 67 65	151 146 142 138 134	226 219 212 206 200	436 422 409 397 386	694 672 652 633 615	1230 1190 1150 1120 1090	2500 2420 2350 2280 2220

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 inch water column = 0.249 kPa

Table entries are rounded to 3 significant digits.

322 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(28) SEMI-RIGID COPPER TUBING [NFPA 54: TABLE 6.3.1(e)]2

							GAS:	GAS:	UNDILUTED PROPANE	UNDILUTED PROPANE
							INLET PRESSURE:	INLET PRESSURE:	10.0 psi	10.0 psi
							PRESSURE DROP:	PRESSURE DROP:	1.0 psi	1.0 psi
							SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	1.50	1.50
INTENDED USE: TUBE SIZING BETWEEN FIRST STAGE (HIGH PRESSURE) REGULATOR AND SECOND STAGE (LOW PRESSURE) REGULATOR
		TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)
NOMINAL:	K & L:	1⁄4	3⁄8	1⁄2	5⁄8	3⁄4	1	11⁄4	11⁄2	2
NOMINAL:	ACR:	3⁄8	1⁄2	5⁄8	3⁄4	7⁄8	11⁄8	13⁄8	–	–
OUTSIDE:	OUTSIDE:	0.375	0.500	0.625	0.750	0.875	1.125	1.375	1.625	2.125
INSIDE:1	INSIDE:1	0.305	0.402	0.527	0.652	0.745	0.995	1.245	1.481	1.959
LENGTH (feet)	LENGTH (feet)	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR
10 20 30 40 50	10 20 30 40 50	513 352 283 242 215	1060 727 584 500 443	2150 1480 1190 1020 901	3760 2580 2080 1780 1570	5330 3670 2940 2520 2230	11 400 7830 6290 5380 4770	20 500 14 100 11 300 9690 8590	32 300 22 200 17 900 15 300 13 500	67 400 46 300 37 200 31 800 28 200
60 70 80 90 100	60 70 80 90 100	194 179 166 156 147	401 369 343 322 304	816 751 699 655 619	1430 1310 1220 1150 1080	2020 1860 1730 1630 1540	4320 3980 3700 3470 3280	7780 7160 6660 6250 5900	12 300 11 300 10 500 9850 9310	25 600 23 500 21 900 20 500 19 400
125 150 175 200 250	125 150 175 200 250	131 118 109 101 90	270 244 225 209 185	549 497 457 426 377	959 869 799 744 659	1360 1230 1130 1060 935	2910 2630 2420 2250 2000	5230 4740 4360 4060 3600	8250 7470 6880 6400 5670	17 200 15 600 14 300 13 300 11 800
300 350 400 450 500	300 350 400 450 500	81 75 70 65 62	168 155 144 135 127	342 314 292 274 259	597 549 511 480 453	847 779 725 680 643	1810 1660 1550 1450 1370	3260 3000 2790 2620 2470	5140 4730 4400 4130 3900	10 700 9840 9160 8590 8120
550 600 650 700 750	550 600 650 700 750	59 56 54 51 50	121 115 111 106 102	246 235 225 216 208	430 410 393 378 364	610 582 558 536 516	1300 1240 1190 1140 1100	2350 2240 2140 2060 1980	3700 3530 3380 3250 3130	7710 7350 7040 6770 6520
800 850 900 950 1000	800 850 900 950 1000	48 46 45 44 42	99 96 93 90 88	201 195 189 183 178	351 340 330 320 311	498 482 468 454 442	1060 1030 1000 970 944	1920 1850 1800 1750 1700	3020 2920 2840 2750 2680	6290 6090 5910 5730 5580
1100 1200 1300 1400 1500	1100 1200 1300 1400 1500	40 38 37 35 34	83 79 76 73 70	169 161 155 148 143	296 282 270 260 250	420 400 383 368 355	896 855 819 787 758	1610 1540 1470 1420 1360	2540 2430 2320 2230 2150	5300 5050 4840 4650 4480
1600 1700 1800 1900 2000	1600 1700 1800 1900 2000	33 32 31 30 29	68 66 64 62 60	138 134 130 126 122	241 234 227 220 214	343 331 321 312 304	732 708 687 667 648	1320 1270 1240 1200 1170	2080 2010 1950 1890 1840	4330 4190 4060 3940 3830

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.8947 kPa

FUEL GAS PIPING

TABLE 1315.2(29) SEMI-RIGID COPPER TUBING [NFPA 54: TABLE 6.3.1(f)]2, 3

							GAS:	GAS:	UNDILUTED PROPANE	UNDILUTED PROPANE
							INLET PRESSURE:	INLET PRESSURE:	11.0 in. w.c.	11.0 in. w.c.
							PRESSURE DROP:	PRESSURE DROP:	0.5 in. w.c.	0.5 in. w.c.
							SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	1.50	1.50
INTENDED USE: TUBE SIZING BETWEEN SINGLE OR SECOND STAGE (LOW PRESSURE) REGULATOR AND APPLIANCE
		TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)
NOMINAL:	K & L:	1⁄4	3⁄8	1⁄2	5⁄8	3⁄4	1	11⁄4	11⁄2	2
NOMINAL:	ACR:	3⁄8	1⁄2	5⁄8	3⁄4	7⁄8	11⁄8	13⁄8	–	–
OUTSIDE:	OUTSIDE:	0.375	0.500	0.625	0.750	0.875	1.125	1.375	1.625	2.125
INSIDE:1	INSIDE:1	0.305	0.402	0.527	0.652	0.745	0.995	1.245	1.481	1.959
LENGTH (feet)	LENGTH (feet)	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR
10 20 30 40 50	10 20 30 40 50	45 31 25 21 19	93 64 51 44 39	188 129 104 89 79	329 226 182 155 138	467 321 258 220 195	997 685 550 471 417	1800 1230 991 848 752	2830 1950 1560 1340 1180	5890 4050 3250 2780 2470
60 70 80 90 100	60 70 80 90 100	17 16 15 14 13	35 32 30 28 27	71 66 61 57 54	125 115 107 100 95	177 163 152 142 134	378 348 324 304 287	681 626 583 547 517	1070 988 919 862 814	2240 2060 1910 1800 1700
125 150 175 200 250	125 150 175 200 250	11 10 NA NA NA	24 21 20 18 16	48 44 40 37 33	84 76 70 65 58	119 108 99 92 82	254 230 212 197 175	458 415 382 355 315	722 654 602 560 496	1500 1360 1250 1170 1030
300 350 400 450 500	300 350 400 450 500	NA NA NA NA NA	15 14 13 12 11	30 28 26 24 23	52 48 45 42 40	74 68 63 60 56	158 146 136 127 120	285 262 244 229 216	449 414 385 361 341	936 861 801 752 710
550 600 650 700 750	550 600 650 700 750	NA NA NA NA NA	11 10 NA NA NA	22 21 20 19 18	38 36 34 33 32	53 51 49 47 45	114 109 104 100 96	205 196 188 180 174	324 309 296 284 274	674 643 616 592 570
800 850 900 950 1000	800 850 900 950 1000	NA NA NA NA NA	NA NA NA NA NA	18 17 17 16 16	31 30 29 28 27	44 42 41 40 39	93 90 87 85 83	168 162 157 153 149	264 256 248 241 234	551 533 517 502 488
1100 1200 1300 1400 1500	1100 1200 1300 1400 1500	NA NA NA NA NA	NA NA NA NA NA	15 14 14 13 13	26 25 24 23 22	37 35 34 32 31	78 75 72 69 66	141 135 129 124 119	223 212 203 195 188	464 442 423 407 392
1600 1700 1800 1900 2000	1600 1700 1800 1900 2000	NA NA NA NA NA	NA NA NA NA NA	12 12 11 11 11	21 20 20 19 19	30 29 28 27 27	64 62 60 58 57	115 112 108 105 102	182 176 170 166 161	378 366 355 345 335

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 inch water column = 0.249 kPa

324 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(30) SEMI-RIGID COPPER TUBING [NFPA 54: TABLE 6.3.1(g)]2

							GAS:	GAS:	UNDILUTED PROPANE	UNDILUTED PROPANE
							INLET PRESSURE:	INLET PRESSURE:	2.0 psi	2.0 psi
							PRESSURE DROP:	PRESSURE DROP:	1.0 psi	1.0 psi
							SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	1.50	1.50
INTENDED USE: TUBE SIZING BETWEEN 2 PSIG SERVICE AND LINE PRESSURE REGULATOR
		TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)	TUBE SIZE (inch)
NOMINAL:	K & L:	1⁄4	3⁄8	1⁄2	5⁄8	3⁄4	1	11⁄4	11⁄2	2
NOMINAL:	ACR:	3⁄8	1⁄2	5⁄8	3⁄4	7⁄8	11⁄8	13⁄8	–	–
OUTSIDE:	OUTSIDE:	0.375	0.500	0.625	0.750	0.875	1.125	1.375	1.625	2.125
INSIDE:1	INSIDE:1	0.305	0.402	0.527	0.652	0.745	0.995	1.245	1.481	1.959
LENGTH (feet)	LENGTH (feet)	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR
10 20 30 40 50	10 20 30 40 50	413 284 228 195 173	852 585 470 402 356	1730 1190 956 818 725	3030 2080 1670 1430 1270	4300 2950 2370 2030 1800	9170 6310 5060 4330 3840	16 500 11 400 9120 7800 6920	26 000 17 900 14 400 12 300 10 900	54 200 37 300 29 900 25 600 22 700
60 70 80 90 100	60 70 80 90 100	157 144 134 126 119	323 297 276 259 245	657 605 562 528 498	1150 1060 983 922 871	1630 1500 1390 1310 1240	3480 3200 2980 2790 2640	6270 5760 5360 5030 4750	9880 9090 8450 7930 7490	20 600 18 900 17 600 16 500 15 600
125 150 175 200 250	125 150 175 200 250	105 95 88 82 72	217 197 181 168 149	442 400 368 343 304	772 700 644 599 531	1100 992 913 849 753	2340 2120 1950 1810 1610	4210 3820 3510 3270 2900	6640 6020 5540 5150 4560	13 800 12 500 11 500 10 700 9510
300 350 400 450 500	300 350 400 450 500	66 60 56 53 50	135 124 116 109 103	275 253 235 221 209	481 442 411 386 365	682 628 584 548 517	1460 1340 1250 1170 1110	2620 2410 2250 2110 1990	4140 3800 3540 3320 3140	8610 7920 7370 6920 6530
550 600 650 700 750	550 600 650 700 750	47 45 43 41 40	97 93 89 86 82	198 189 181 174 168	346 330 316 304 293	491 469 449 431 415	1050 1000 959 921 888	1890 1800 1730 1660 1600	2980 2840 2720 2620 2520	6210 5920 5670 5450 5250
800 850 900 950 1000	800 850 900 950 1000	39 37 36 35 34	80 77 75 72 71	162 157 152 147 143	283 274 265 258 251	401 388 376 366 356	857 829 804 781 760	1540 1490 1450 1410 1370	2430 2350 2280 2220 2160	5070 4900 4750 4620 4490
1100 1200 1300 1400 1500	1100 1200 1300 1400 1500	32 31 30 28 27	67 64 61 59 57	136 130 124 120 115	238 227 217 209 201	338 322 309 296 286	721 688 659 633 610	1300 1240 1190 1140 1100	2050 1950 1870 1800 1730	4270 4070 3900 3740 3610
1600 1700 1800 1900 2000	1600 1700 1800 1900 2000	26 26 25 24 23	55 53 51 50 48	111 108 104 101 99	194 188 182 177 172	276 267 259 251 244	589 570 553 537 522	1060 1030 1000 966 940	1670 1620 1570 1520 1480	3480 3370 3270 3170 3090

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.8947 kPa

FUEL GAS PIPING

TABLE 1315.2(31) CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54: TABLE 6.3.1(h)] [1, 2]

									GAS:			UNDILUTED PROPANE
									INLET PRESSURE:	INLET PRESSURE:	INLET PRESSURE:	11.0 in. w.c.	11.0 in. w.c.	11.0 in. w.c.
									PRESSURE DROP:	PRESSURE DROP:	PRESSURE DROP:	0.5 in. w.c.	0.5 in. w.c.	0.5 in. w.c.
									SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	1.50	1.50	1.50
INTENDED USE: CSST SIZING BETWEEN SINGLE OR SECOND STAGE (LOW PRESSURE) REGULATOR AND APPLIANCE SHUTOFF VALVE
	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3	TUBE SIZE (EHD)3
FLOW DESIGNATION:	13	15	18	19	23	25	30	31	37	39	46	48	60	62
LENGTH (feet)	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR
5 10 15 20	72 50 39 34	99 69 55 49	181 129 104 91	211 150 121 106	355 254 208 183	426 303 248 216	744 521 422 365	863 605 490 425	1420 971 775 661	1638 1179 972 847	2830 1990 1620 1400	3270 2320 1900 1650	5780 4110 3370 2930	6550 4640 3790 3290
25 30 40 50	30 28 23 20	42 39 33 30	82 74 64 58	94 87 74 66	164 151 131 118	192 177 153 137	325 297 256 227	379 344 297 265	583 528 449 397	762 698 610 548	1250 1140 988 884	1480 1350 1170 1050	2630 2400 2090 1870	2940 2680 2330 2080
60 70 80 90	19 17 15 15	26 25 23 22	53 49 45 44	60 57 52 50	107 99 94 90	126 117 109 102	207 191 178 169	241 222 208 197	359 330 307 286	502 466 438 414	805 745 696 656	961 890 833 787	1710 1590 1490 1400	1900 1760 1650 1550
100 150 200 250 300	14 11 9 8 8	20 15 14 12 11	41 31 28 25 23	47 36 33 30 26	85 66 60 53 50	98 75 69 61 57	159 123 112 99 90	186 143 129 117 107	270 217 183 163 147	393 324 283 254 234	621 506 438 390 357	746 611 531 476 434	1330 1090 948 850 777	1480 1210 1050 934 854

For SI units: 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 inch water column = 0.249 kPa

Notes: 1 Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, fittings, or both shall be increased

by an equivalent length of tubing to the following equation: L = 1.3 n, where L is additional length (ft) of tubing and n is the number of additional fittings,

bends, or both. 2 Table entries are rounded to 3 significant digits. 3 EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD,

the greater the gas capacity of the tubing.

326 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(32) CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54: TABLE 6.3.1(i)]1,									2, 3, 4
									GAS:	GAS:	GAS:	UNDILUTED PROPANE	UNDILUTED PROPANE	UNDILUTED PROPANE
									INLET PRESSURE:	INLET PRESSURE:	INLET PRESSURE:	2.0 psi	2.0 psi	2.0 psi
									PRESSURE DROP:	PRESSURE DROP:	PRESSURE DROP:	1.0 psi	1.0 psi	1.0 psi
									SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	1.50	1.50	1.50
INTENDED USE: CSST SIZING BETWEEN 2 PSIG SERVICE AND LINE PRESSURE REGULATOR
	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5
FLOW DESIGNATION:	13	15	18	19	23	25	30	31	37	39	46	48	60	62
LENGTH (feet)	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR
10 25 30 40 50	426 262 238 203 181	558 347 316 271 243	927 591 540 469 420	1110 701 640 554 496	1740 1120 1030 896 806	2170 1380 1270 1100 986	4100 2560 2330 2010 1790	4720 2950 2690 2320 2070	7130 4560 4180 3630 3260	7958 5147 4719 4116 3702	15 200 9550 8710 7530 6730	16 800 10 700 9790 8500 7610	29 400 18 800 17 200 14 900 13 400	34 200 21 700 19 800 17 200 15 400
75 80 100 150 200	147 140 124 101 86	196 189 169 137 118	344 333 298 245 213	406 393 350 287 248	663 643 578 477 415	809 768 703 575 501	1460 1410 1260 1020 880	1690 1630 1450 1180 1020	2680 2590 2330 1910 1660	3053 2961 2662 2195 1915	5480 5300 4740 3860 3340	6230 6040 5410 4430 3840	11 000 10 600 9530 7810 6780	12 600 12 200 10 900 8890 7710
250 300 400 500	77 69 60 53	105 96 82 72	191 173 151 135	222 203 175 158	373 343 298 268	448 411 355 319	785 716 616 550	910 829 716 638	1490 1360 1160 1030	1722 1578 1376 1237	2980 2720 2350 2100	3440 3150 2730 2450	6080 5560 4830 4330	6900 6300 5460 4880

For SI units: 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.8947 kPa

Notes: 1 Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 0.5 psi (3.4 kPa) [based on 13 inch water column (3.2

kPa) outlet pressure], DO NOT use THIS TABLE. Consult with regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regu lator are capable of varying with flow rate. 2 CAUTION: Capacities shown in table are capable of exceeding the maximum capacity for a selected regulator. Consult with regulator or tubing manufac turer for guidance. 3 Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, fittings, or both shall be increased by

an equivalent length of tubing to the following equation: L = 1.3 n, where L is additional length (ft) of tubing and n is the number of additional fittings, bends, or

both. 4 Table entries are rounded to 3 significant digits. 5 EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD,

the greater the gas capacity of the tubing.

FUEL GAS PIPING

TABLE 1315.2(33) CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54: TABLE 6.3.1(j)]1,									, 2, 3, 4
									GAS:	GAS:	GAS:	UNDILUTED PROPANE	UNDILUTED PROPANE	UNDILUTED PROPANE
									INLET PRESSURE:	INLET PRESSURE:	INLET PRESSURE:	5.0 psi	5.0 psi	5.0 psi
									PRESSURE DROP:	PRESSURE DROP:	PRESSURE DROP:	3.5 psi	3.5 psi	3.5 psi
									SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	1.50	1.50	1.50
	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5	TUBE SIZE (EHD)5
FLOW DESIGNATION:	13	15	18	19	23	25	30	31	37	39	46	48	60	62
LENGTH (feet)	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR
10 25 30 40 50	826 509 461 396 352	1070 664 603 520 463	1710 1090 999 867 777	2060 1310 1190 1030 926	3150 2040 1870 1630 1460	4000 2550 2340 2030 1820	7830 4860 4430 3820 3410	8950 5600 5100 4400 3930	13 100 8400 7680 6680 5990	14 441 9339 8564 7469 6717	28 600 18 000 16 400 14 200 12 700	31 200 19 900 18 200 15 800 14 100	54 400 34 700 31 700 27 600 24 700	63 800 40 400 36 900 32 000 28 600
75 80 100 150 200	284 275 243 196 169	376 363 324 262 226	637 618 553 453 393	757 731 656 535 464	1210 1170 1050 866 755	1490 1450 1300 1060 923	2770 2680 2390 1940 1680	3190 3090 2760 2240 1930	4920 4770 4280 3510 3050	5539 5372 4830 3983 3474	10 300 9990 8930 7270 6290	11 600 11 200 10 000 8210 7130	20 300 19 600 17 600 14 400 12 500	23 400 22 700 20 300 16 600 14 400
250 300 400 500	150 136 117 104	202 183 158 140	352 322 279 251	415 379 328 294	679 622 542 488	828 757 657 589	1490 1360 1170 1050	1730 1570 1360 1210	2740 2510 2180 1950	3124 2865 2498 2247	5620 5120 4430 3960	6390 5840 5070 4540	11 200 10 300 8920 8000	12 900 11 700 10 200 9110

For SI units: 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.8947 kPa

Notes: 1 Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 0.5 psi (3.4 kPa) [based on 13 inch water column (3.2 kPa) out let pressure], DO NOT USE THIS TABLE. Consult with regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator are capa ble of varying with flow rate. 2 CAUTION: Capacities shown in table are capable of exceeding the maximum capacity for a selected regulator. Consult with regulator or tubing manufacturer for

guidance. 3 Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, fittings, or both shall be increased by an equiv alent length of tubing to the following equation: L = 1.3 n, where L is additional length (ft) of tubing and n is the number of additional fittings, bends, or both. 4 Table entries are rounded to 3 significant digits. 5 EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the

greater the gas capacity of the tubing.

328 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(34) POLYETHYLENE PLASTIC PIPE [NFPA 54: TABLE 6.3.1(k)]*

					GAS:	GAS:	UNDILUTED PROPANE	UNDILUTED PROPANE
					INLET PRESSURE:	INLET PRESSURE:	11.0 in. w.c.	11.0 in. w.c.
					PRESSURE DROP:	PRESSURE DROP:	0.5 in. w.c.	0.5 in. w.c.
					SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	1.50	1.50
INTENDED USE: PE PIPE SIZING BETWEEN INTEGRAL SECOND-STAGE REGULATOR AT TANK OR SECOND-STAGE (LOW PRESSURE) REGULATOR AND BUILDING
	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)
NOMINAL OD:	1⁄2	3⁄4	1	11⁄4	11⁄2	2	3	4
DESIGNATION:	SDR 9.3	SDR 11	SDR 11	SDR 10	SDR 11	SDR 11	SDR 11	SDR 11
ACTUAL ID:	0.660	0.860	1.077	1.328	1.554	1.943	2.864	3.682
LENGTH (feet)	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR
10	340	680	1230	2130	3210	5770	16 000	30 900
20	233	468	844	1460	2210	3970	11 000	21 200
30	187	375	677	1170	1770	3180	8810	17 000
40	160	321	580	1000	1520	2730	7540	14 600
50	142	285	514	890	1340	2420	6680	12 900
60	129	258	466	807	1220	2190	6050	11 700
70	119	237	428	742	1120	2010	5570	10 800
80	110	221	398	690	1040	1870	5180	10 000
90	103	207	374	648	978	1760	4860	9400
100	98	196	353	612	924	1660	4590	8900
125	87	173	313	542	819	1470	4070	7900
150	78	157	284	491	742	1330	3690	7130
175	72	145	261	452	683	1230	3390	6560
200	67	135	243	420	635	1140	3160	6100
250	60	119	215	373	563	1010	2800	5410
300	54	108	195	338	510	916	2530	4900
350	50	99	179	311	469	843	2330	4510
400	46	92	167	289	436	784	2170	4190
450	43	87	157	271	409	736	2040	3930
500	41	82	148	256	387	695	1920	3720

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 inch water column = 0.249 kPa - Table entries are rounded to 3 significant digits.

FUEL GAS PIPING

TABLE 1315.2(35) POLYETHYLENE PLASTIC PIPE [NFPA 54: TABLE 6.3.1(l)]*

					GAS:	GAS:	UNDILUTED PROPANE	UNDILUTED PROPANE
					INLET PRESSURE:	INLET PRESSURE:	2.0 psi	2.0 psi
					PRESSURE DROP:	PRESSURE DROP:	1.0 psi	1.0 psi
					SPECIFIC GRAVITY:	SPECIFIC GRAVITY:	1.50	1.50
INTENDED USE: PE PIPE SIZING BETWEEN 2 PSI SERVICE REGULATOR AND LINE PRESSURE REGULATOR
	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)	PIPE SIZE (inch)
NOMINAL OD:	1⁄2	3⁄4	1	11⁄4	11⁄2	2	3	4
DESIGNATION:	SDR 9.3	SDR 11	SDR 11	SDR 10	SDR 11	SDR 11	SDR 11	SDR 11
ACTUAL ID:	0.660	0.860	1.077	1.328	1.554	1.943	2.864	3.682
LENGTH (feet)	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR
10	3130	6260	11 300	19 600	29 500	53 100	147 000	284 000
20	2150	4300	7760	13 400	20 300	36 500	101 000	195 000
30	1730	3450	6230	10 800	16 300	29 300	81 100	157 000
40	1480	2960	5330	9240	14 000	25 100	69 400	134 100
50	1310	2620	4730	8190	12 400	22 200	61 500	119 000
60	1190	2370	4280	7420	11 200	20 100	55 700	108 000
70	1090	2180	3940	6830	10 300	18 500	51 300	99 100
80	1010	2030	3670	6350	9590	17 200	47 700	92 200
90	952	1910	3440	5960	9000	16 200	44 700	86 500
100	899	1800	3250	5630	8500	15 300	42 300	81 700
125	797	1600	2880	4990	7530	13 500	37 500	72 400
150	722	1450	2610	4520	6830	12 300	33 900	65 600
175	664	1330	2400	4160	6280	11 300	31 200	60 300
200	618	1240	2230	3870	5840	10 500	29 000	56 100
250	548	1100	1980	3430	5180	9300	25 700	49 800
300	496	994	1790	3110	4690	8430	23 300	45 100
350	457	914	1650	2860	4320	7760	21 500	41 500
400	425	851	1530	2660	4020	7220	12 000	38 600
450	399	798	1440	2500	3770	6770	18 700	36 200
500	377	754	1360	2360	3560	6390	17 700	34 200
550	358	716	1290	2240	3380	6070	16 800	32 500
600	341	683	1230	2140	3220	5790	16 000	31 000
650	327	654	1180	2040	3090	5550	15 400	29 700
700	314	628	1130	1960	2970	5330	14 700	28 500
750	302	605	1090	1890	2860	5140	14 200	27 500
800	292	585	1050	1830	2760	4960	13 700	26 500
850	283	566	1020	1770	2670	4800	13 300	25 700
900	274	549	990	1710	2590	4650	12 900	24 900
950	266	533	961	1670	2520	4520	12 500	24 200
1000	259	518	935	1620	2450	4400	12 200	23 500
1100	246	492	888	1540	2320	4170	11 500	22 300
1200	234	470	847	1470	2220	3980	11 000	21 300
1300	225	450	811	1410	2120	3810	10 600	20 400
1400	216	432	779	1350	2040	3660	10 100	19 600
1500	208	416	751	1300	1960	3530	9760	18 900
1600	201	402	725	1260	1900	3410	9430	18 200
1700	194	389	702	1220	1840	3300	9130	17 600
1800	188	377	680	1180	1780	3200	8850	17 100
1900	183	366	661	1140	1730	3110	8590	16 600
2000	178	356	643	1110	1680	3020	8360	16 200

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.8947 kPa

Table entries are rounded to 3 significant digits.

330 2025 CALIFORNIA MECHANICAL CODE

FUEL GAS PIPING

TABLE 1315.2(36) POLYETHYLENE PLASTIC TUBING [NFPA 54: TABLE 6.3.1(m)] [2]

	GAS:	UNDILUTED PROPANE
	INLET PRESSURE:	11.0 in. w.c.
	PRESSURE DROP:	0.5 in. w.c.
	SPECIFIC GRAVITY:	1.50
INTENDED USE: SIZING BETWEEN INTEGRAL 2-STAGE REGULATOR AT TANK OR SECOND-STAGE (LOW PRESSURE REGULATOR) AND THE BUILDING
	PLASTIC TUBING SIZE (CTS)1 (inch)	PLASTIC TUBING SIZE (CTS)1 (inch)
NOMINAL OD:	1⁄2	1
DESIGNATION:	SDR 7	SDR 11
ACTUAL ID:	0.445	0.927
LENGTH (feet)	CAPACITY IN THOUSANDS OF BTU PER HOUR	CAPACITY IN THOUSANDS OF BTU PER HOUR
10 20 30 40 50	121 83 67 57 51	828 569 457 391 347
60 70 80 90 100	46 42 39 37 35	314 289 269 252 238
125 150 175 200	31 28 26 24	211 191 176 164
225 250 275 300	22 21 20 19	154 145 138 132
350 400 450 500	18 16 15 15	121 113 106 100

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 inch water column = 0.249 kPa

Notes: 1 CTS = Copper tube size. 2 Table entries are rounded to 3 significant digits.

332 2025 CALIFORNIA MECHANICAL CODE

CALIFORNIA MECHANICAL CODE – MATRIX ADOPTION TABLE

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California Mechanical Code (Title 24, Part 4)