1327.7 Standing Pressure Tests for Oxygen and Nitrous

Nitrous Oxide Piping. After successful completion of the initial pressure tests in Section 1327.4, the gas distribution piping shall be subject to a standing pressure test. [NFPA 99:15.4.7.4.6.1]

1327.7.1 Tests Required. Tests shall be conducted after the final installation of station outlet valve bodies,

TABLE 1327.5

MAXIMUM COPPER TUBE SUPPORT SPACING

[NFPA 99: TABLE 15.4.5.6.5]

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm

TABLE 1327.6

MAXIMUM PLASTIC PIPE SUPPORT SPACING

[NFPA 99: TABLE 15.4.5.6.6]

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm

HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS

faceplates, and other distribution system components (e.g., pressure alarm devices, pressure indicators, line pressure relief valves, manufactured assemblies, and hoses). [NFPA 99:15.4.7.4.6.2]

1327.7.2 Source Valve. The source valve shall be closed during this test. [NFPA 99:15.4.7.4.6.3] 1327.7.3 Piping Systems. The piping systems shall be subjected to 24-hour standing pressure tests using oilfree, dry nitrogen NF. [NFPA 99:15.4.7.4.6.4] 1327.7.4 Test Pressure. Test pressures shall be 20 percent above the normal system operating line pressure.

[NFPA 99:15.4.7.4.6.5] 1327.7.5 Change in Test Pressure. At the conclusion of the tests, there shall be no change in the test pressure except that attributed to specific changes in ambient temperature. [NFPA 99:15.4.7.4.6.6] 1327.7.6 Leaks. Any leaks shall be located, repaired (if permitted), or replaced (if required) by the installer, and retested. [NFPA 99:15.4.7.4.6.7]