Hazardous Process Piping (HPP) & Location

Grounded in the retrieved California Mechanical Code — click a citation to read the verbatim passage:

• CMC § 1406.0 High relevance — show source text

  1406.0 Pipe, Tubing, and Fittings.

  1406.1 General. Process pipe, tubing, and fittings shall comply with ASME B31.3 and shall be installed in accordance with the manufacturer’s installation instructions. Materials shall be rated for the operating temperatures and pressures of the system, and shall be compatible with the type of liquid.

  1406.2 Hazardous Process Piping (HPP). HPP supply piping or tubing in service corridors shall be exposed to view. HPP piping shall be identified in accordance with nationally recognized standards to indicate the material being transported. Liquid HPP piping shall have an approved means for directing spilled materials to an approved containment or drainage system.

  Liquid HPP waste or drainage systems shall be installed in accordance with the plumbing code.

  1406.2.1 Installation in Exit Corridors and Above Other Occupancies. Hazardous process supply pipe shall not be located within exit corridors, within a portion of a means of egress required to be enclosed in fire-resistive construction, or in concealed spaces in or above

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  PROCESS PIPING

  areas not classified as Group H Occupancies, except as permitted by this subsection.

  Hazardous production material piping and tubing shall be permitted to be installed within the space defined by the walls of exit corridors and the floor or roof above, or in concealed spaces above other occupancies in accordance with Section 1406.2.1.1 through Section 1406.2.1.6.

  1406.2.1.1 Automatic Sprinklers. Automatic sprinklers shall be installed within the space unless the space is less than 6 inches (152 mm) in the least dimension.

  1406.2.1.2 Ventilation. Ventilation at not less than

  6 air changes per hour (ACH) shall be provided. The space shall not be used to convey air from other

  areas.

  1406.2.1.3 Receptor. Where the piping or tubing is used to transport HPP liquids, a receptor shall be installed below such piping or tubing. The receptor shall be designed to collect discharge or leakage and drain it to an approved location. The 1 hour enclosure shall not be used as part of the receptor.

  1406.2.1.4 Separation. HPP supply piping and tubing and HPP nonmetallic waste lines shall be separated from the exit corridor and from an occupancy other than a semi-conductor fabrication facility classified as a Group H Occupancy by construction, as required for walls or partitions that have a fire-protection rating of not less than 1 hour. Where gypsum wallboard is used, joints on the piping side of the enclosure need not be taped, provided the joints occur over framing members. Access openings into the enclosure shall be protected by approved fire assemblies.

  1406.2.1.5 Emergency Shutoff Valves. Readily accessible manual or automatic remotely activated fail-safe emergency shutoff valves shall be installed on piping and tubing other than waste lines at the following locations:

  (1) At branch connections into the fabrication area.

  (2) At entries into exit corridors. Excess flow valves shall be installed as required by the fire code.

• CMC § 1405.2 High relevance — show source text

  Excavations required for the installation of underground piping shall be kept open until such time as the piping has been inspected and approved. Where such piping is covered or concealed before such approval, it shall be exposed upon the direction of the Authority Having Jurisdiction.

  1405.2 Required Inspections. The Authority Having Jurisdiction shall make the following inspections and shall either approve that portion of the work as completed or shall notify the permit holder wherein the same fails to be in accordance with this code.

  1405.2.1 Rough Piping Inspection. This inspection shall be made after process piping authorized by the permit has been installed and before piping has been cov

  ered or concealed. This inspection shall include a determination that the piping size, material, and installation are in accordance with the requirements of this code.

  1405.2.2 Final Piping Inspection. This inspection shall be made after piping authorized by the permit has been installed and after portions thereof that are to be covered or concealed are so concealed. This inspection shall include a pressure test, at which time the piping shall stand a pressure of not less than one-and-one-half times the maximum designed operating pressure where hydraulic testing is conducted or 110 percent where testing is conducted pneumatically. Test pressures shall be held for a length of time satisfactory to the Authority Having Jurisdiction, but in no case for less than 30 minutes with no perceptible drop in pressure. HPM drain, waste, and vent piping shall be tested in accordance with the plumbing code. Tests shall be made in the presence of the Authority Having Jurisdiction. Necessary apparatus for conducting tests shall be furnished by the permit holder.

  1405.3 Other Inspections. In addition to the inspections required by this section, the Authority Having Jurisdiction shall be permitted to require a special inspector, as specified in the building code, during installation of piping systems. In cases where the work authorized was installed in accordance with plans and specifications prepared by a registered design professional, the Authority Having Jurisdiction shall be permitted to require a final signed report stating that the work was installed in accordance with approved plans and specifications and the applicable provisions of this chapter.

  1406.0 Pipe, Tubing, and Fittings.

  1406.1 General. Process pipe, tubing, and fittings shall comply with ASME B31.3 and shall be installed in accordance with the manufacturer’s installation instructions. Materials shall be rated for the operating temperatures and pressures of the system, and shall be compatible with the type of liquid.

  1406.2 Hazardous Process Piping (HPP). HPP supply piping or tubing in service corridors shall be exposed to view. HPP piping shall be identified in accordance with nationally recognized standards to indicate the material being transported. Liquid HPP piping shall have an approved means for directing spilled materials to an approved containment or drainage system.

  Liquid HPP waste or drainage systems shall be installed in accordance with the plumbing code.

  1406.2.1 Installation in Exit Corridors and Above Other Occupancies. Hazardous process supply pipe shall not be located within exit corridors, within a portion of a means of egress required to be enclosed in fire-resistive construction, or in concealed spaces in or above

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  PROCESS PIPING

  areas not classified as Group H Occupancies, except as permitted by this subsection.

• CMC § 1406.2.1.1 Medium relevance — show source text

  1406.2.1.1 Automatic Sprinklers. Automatic sprinklers shall be installed within the space unless the space is less than 6 inches (152 mm) in the least dimension.

  1406.2.1.2 Ventilation. Ventilation at not less than

  6 air changes per hour (ACH) shall be provided. The space shall not be used to convey air from other

  areas.

  1406.2.1.3 Receptor. Where the piping or tubing is used to transport HPP liquids, a receptor shall be installed below such piping or tubing. The receptor shall be designed to collect discharge or leakage and drain it to an approved location. The 1 hour enclosure shall not be used as part of the receptor.

  1406.2.1.4 Separation. HPP supply piping and tubing and HPP nonmetallic waste lines shall be separated from the exit corridor and from an occupancy other than a semi-conductor fabrication facility classified as a Group H Occupancy by construction, as required for walls or partitions that have a fire-protection rating of not less than 1 hour. Where gypsum wallboard is used, joints on the piping side of the enclosure need not be taped, provided the joints occur over framing members. Access openings into the enclosure shall be protected by approved fire assemblies.

  1406.2.1.5 Emergency Shutoff Valves. Readily accessible manual or automatic remotely activated fail-safe emergency shutoff valves shall be installed on piping and tubing other than waste lines at the following locations:

  (1) At branch connections into the fabrication area.

  (2) At entries into exit corridors. Excess flow valves shall be installed as required by the fire code.

  1406.2.1.6 Electrical Wiring. Electrical wiring and equipment located in the piping space shall be approved for Class I, Division 2, Hazardous Locations.

  Exception: Occasional transverse crossing of the corridors by supply piping that is enclosed within the corridor need not comply with Section 1406.2.1.1 through Section 1406.2.1.6.

  1406.3 Special Requirements for HPP Gases. In addition to other requirements of this section, HPP gases shall comply with this subsection and the fire code.

  1406.3.1 Special Provisions. Where HPP supply gas is carried in pressurized piping, a fail-safe system shall shut off flow due to a rupture in the piping. Where the piping originates from outside the building, the valve shall be located outside the building as close to the bulk source as practical.

  1406.3.2 Piping and Tubing Installation. Piping and tubing shall be installed in accordance with approved standards. Supply piping for hazardous production materials having a health hazard ranking of 3 or 4 shall have welded connections throughout, unless an exhausted enclosure is provided.

  Exception: Material that is incompatible with ferrous piping shall be permitted to be installed in nonmetallic piping with approved connections.

• CMC § 1406.2.1.5 Medium relevance — show source text

  1406.2.1.5 Emergency Shutoff Valves. Readily accessible manual or automatic remotely activated fail-safe emergency shutoff valves shall be installed on piping and tubing other than waste lines at the following locations:

  (1) At branch connections into the fabrication area.

  (2) At entries into exit corridors. Excess flow valves shall be installed as required by the fire code.

  1406.2.1.6 Electrical Wiring. Electrical wiring and equipment located in the piping space shall be approved for Class I, Division 2, Hazardous Locations.

  Exception: Occasional transverse crossing of the corridors by supply piping that is enclosed within the corridor need not comply with Section 1406.2.1.1 through Section 1406.2.1.6.

  1406.3 Special Requirements for HPP Gases. In addition to other requirements of this section, HPP gases shall comply with this subsection and the fire code.

  1406.3.1 Special Provisions. Where HPP supply gas is carried in pressurized piping, a fail-safe system shall shut off flow due to a rupture in the piping. Where the piping originates from outside the building, the valve shall be located outside the building as close to the bulk source as practical.

  1406.3.2 Piping and Tubing Installation. Piping and tubing shall be installed in accordance with approved standards. Supply piping for hazardous production materials having a health hazard ranking of 3 or 4 shall have welded connections throughout, unless an exhausted enclosure is provided.

  Exception: Material that is incompatible with ferrous piping shall be permitted to be installed in nonmetallic piping with approved connections.

  1406.3.3 Gas-Detection System. Where hazardous production material gas is used or dispensed and the physiological warning properties of the gas are at a higher level than the accepted permissible exposure limit (PEL) of the gas, a continuous gas-monitoring system shall be provided to detect the presence of the short-term hazard condition. Where dispensing occurs and flammable gases or vapors are capable of being present in quantities in excess of 25 percent of the lower explosive limit (LEL), a continuous gas-monitoring system shall be connected to the emergency control station. The maximum permitted time-weighted average exposures to be utilized shall be as published in 29 CFR 1910.1000.

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  CALIFORNIA MECHANICAL CODE – MATRIX ADOPTION TABLE

  CHAPTER 15 – SOLAR ENERGY SYSTEMS

  (Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

  |Adopting Agency
  Adopt Entire Chapter
  Adopt Entire Chapter as
  amended (amended sections
  listed below)
  Adopt only those sections
  that are listed below
  Chapter/Section
  1502.

• CMC § 1402.1 Medium relevance — show source text

  1402.1 General. . . . . . . . . . . . . . . . . . . . . 335

  1403.0 Plans Required . . . . . . . . . . . . . . . 335

  1403.1 General. . . . . . . . . . . . . . . . . . . . . 335

  1404.0 Workmanship . . . . . . . . . . . . . . . . 335

  1404.1 General. . . . . . . . . . . . . . . . . . . . . 335

  1405.0 Inspections . . . . . . . . . . . . . . . . . . 335

  1405.1 General. . . . . . . . . . . . . . . . . . . . . 335

  1405.2 Required Inspections . . . . . . . . . . 335

  1405.3 Other Inspections . . . . . . . . . . . . . 335

  1406.0 Pipe, Tubing, and Fittings. . . . . . . 335

  1406.1 General. . . . . . . . . . . . . . . . . . . . . 335

  1406.2 Hazardous Process

  Piping (HPP). . . . . . . . . . . . . . . . . 335

  1406.3 Special Requirements for HPP Gases . . . . . . . . . . . . . . . . . . . . . . 336

  CHAPTER 15 SOLAR ENERGY SYSTEMS. . . . 337

  1501.0 General. . . . . . . . . . . . . . . . . . . . . 339

  1501.1 Applicability. . . . . . . . . . . . . . . . . . 339

  1502.0 General. . . . . . . . . . . . . . . . . . . . . 339

  CHAPTER 16 STATIONARY POWER

  PLANTS . . . . . . . . . . . . . . . . . . . . 341

  1601.0 Stationary Fuel Cell Power Plants . . . . . . . . . . . . . . . . . . . . . . 343

  1601.1 General. . . . . . . . . . . . . . . . . . . . . 343

  1602.0 Stationary Gas Engines and Generators and Gas Turbines . . . 343

  1602.1 Gas Engines . . . . . . . . . . . . . . . . . 343

  1602.2 Liquid-Fueled Engines and Gas Turbines . . . . . . . . . . . . . . . . 343

  1602.3 Stationary Engine Generators . . . 343

  CHAPTER 17 GEOTHERMAL ENERGY

  SYSTEMS AND AMBIENT

  TEMPERATURE LOOPS. . . . . . . 345

  Part I General . . . . . . . . . . . . . . . . . . . . 347

  1701.0 General. . . . . . . . . . . . . . . . . . . . . 347

• CMC § 104.5 Medium relevance — show source text

  4. Boilers, Compressors, and Absorption Systems:

  For the installation or relocation of each boiler or compressor, not exceeding 3 horsepower (hp), or each absorption system not exceeding 100 000 Btu/h......................................................_____ [1 ]

  For the installation or relocation of each boiler or compressor exceeding 3 hp, not exceeding 15 hp, or each absorption system exceeding 100 000 Btu/h and including 500 000 Btu/h ................................._____ [1 ]

  For the installation or relocation of each boiler or compressor exceeding 15 hp, not exceeding 30 hp, or each absorption system exceeding 500 000 Btu/h, not exceeding 1 000 000 Btu/h............................._____ [1 ]

  For the installation or relocation of each boiler or compressor exceeding 30 hp, not exceeding 50 hp, or for each absorption system exceeding 1 000 000 Btu/h, not exceeding 1 750 000 Btu/h............................................................................................................................._____ [1] For the installation or relocation of each boiler or compressor exceeding 50 hp, or each absorption system exceeding 1 750 000 Btu/h........................................................................................_____ [1]

  5. Air Handlers:

  For each air-handling unit not exceeding 10 000 cubic feet per minute (CFM), including ducts attached thereto........................................................................................................................_____ [1, 2]

  6. Evaporative Coolers: For each air-handling unit exceeding 10 000 CFM ............................................................................................._____ [1 ]

  For each evaporative cooler other than portable type .........................................................................................._____ [1]

  7. Ventilation and Exhaust: For each ventilation fan connected to a single duct ............................................................................................._____ [1 ]

  For each ventilation system that is not a portion of a heating or air-conditioning system authorized by a permit.........................................................................................................................................._____ [1]

  For the installation of each hood that is served by mechanical exhaust, including the ducts for such hood ........................................................................................................................_____ [1]

  8. Incinerators:

  For the installation or relocation of each domestic-type incinerator...................................................................._____ [1] For the installation or relocation of each commercial or industrial-type incinerator..........................................._____ [1]

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  DIVISION II SCOPE AND ADMINISTRATION

  TABLE 104.5 (continued)

  MECHANICAL PERMIT FEES

  9. Miscellaneous:

  For each appliance or piece of equipment regulated by this code, but not classed in other appliance categories, or for which no other fee is listed in this table..................................................................................._____ [1]

  10. Fuel Gas Piping:

  Where Chapter 13 or Appendix B is applicable (See Section 101.2), permit fees for fuel-gas piping shall be as follows: For each gas piping system of one to five outlets ................................................................................................_____ [1] For each additional gas piping system, per outlet................................................................................................_____ [1]

  11. Process Piping: For each hazardous process piping system (HPP) of one to four outlets............................................................._____ [1]
• CMC § 2904.2.1 Medium relevance — show source text

  3. The immediate vicinity of pumps or equipment locations, such as dispensing stations, open centrifuges, plate and frame filters, opened vacuum filters, change cans and the surfaces of open equipment. The immediate vicinity shall include a zone extending from the vapor liberation point 5 feet (1524 mm) horizontally in all directions and vertically from the floor to a level 3 feet (914 mm) above the highest point of vapor liberation.

  2904.2.1 Other locations. Locations within the confines of the manufacturing room where Class I liquids are handled shall be Class I, Division 2, except locations indicated in Section 2904.2.

  2904.2.2 Ordinary equipment. Ordinary electrical equipment, including switchgear, shall be prohibited, except where installed in a room maintained under positive pressure with respect to the hazardous area. The air or other media utilized for pressurization shall be obtained from a source that will not cause any amount or type of flammable vapor to be introduced into the room.

  2904.3 Bonding. Equipment including, but not limited to, tanks, machinery and piping shall be bonded and connected to a ground where an ignitable mixture is capable of being present.

  2904.3.1 Piping. Electrically isolated sections of metallic piping or equipment shall be grounded or bonded to the other grounded portions of the system.

  2904.3.2 Vehicles. Tank vehicles loaded or unloaded through open connections shall be grounded and bonded to the receiving system.

  2904.3.3 Containers. Where a flammable mixture is transferred from one portable container to another, a bond shall be provided between the two containers, and one shall be grounded.

  2904.4 Ground. Metal framing of buildings shall be grounded with resistance of not more than 5 ohms.

  SECTION 2905—PROCESS STRUCTURES

  2905.1 Design. Process structures shall be designed and constructed in accordance with the California Building Code .

  2905.2 Fire apparatus access. Fire apparatus access complying with Section 503 shall be provided for the purpose of fire control to not less than one side of organic coating manufacturing operations.

  2905.3 Drainage. Drainage facilities shall be provided in accordance with Section 2903.10 where topographical conditions are such that flammable and combustible liquids are capable of flowing from the organic coating manufacturing operation so as to constitute a fire hazard to other premises.

  2905.4 Explosion control. Explosion control shall be provided in areas subject to potential deflagration hazards as indicated in NFPA 35. Explosion control shall be provided in accordance with Section 911.

  2905.5 Ventilation. Enclosed structures in which Class I liquids are processed or handled shall be ventilated at a rate of not less than 1 cubic foot per minute per square foot [0.00508 m [3] /(s × m [2] )] of solid floor area. Ventilation shall be accomplished by exhaust fans that take suction at floor levels and discharge to a safe location outside the structure. Noncontaminated intake air shall be introduced in such a manner that all portions of solid floor areas are provided with continuous uniformly distributed air movement.

  2905.6 Heating. Heating provided in hazardous areas shall be by indirect means. Ignition sources such as open flames or electrical heating elements, except as provided for in Section 2904, shall not be permitted within the structure.

  SECTION 2906—PROCESS MILLS AND KETTLES

• CMC § 210.0 Medium relevance — show source text

  Ground-Heat Exchanger. An underground closed-loop heat exchanger through which a heat-transfer medium passes to and from a heat pump or other rated mechanical equipment. It includes the buried pipe and connecting main(s) up to and terminating with the building.

  Ground-Source Heat Pump. A term that is applied to a variety of systems that use the ground, groundwater, or surface water as a heat source and sink. The general terms include ground-coupled (GCHP), groundwater (GWHP), and surface-water (SWHP) heat pumps. Many parallel terms exist

  [e.g., geothermal heat pumps (GHP), geo-exchange, and ground-source (GS) systems] and are used to meet a variety of marketing or institutional needs.

  Grounding Electrode. A conducting object through which a direct connection to earth is established. [NFPA 70:100(I)]

  Groundwater. Water that exists beneath the earth’s surface.

  Groundwater Source. A geothermal energy system that uses the groundwater as a heat source or sink.

  210.0 – H –

  Hangers. See Supports.

  Hazardous Location. An area or space where combustible dust, ignitable fibers, flammable liquids, volatile liquids, gases, vapors, or mixtures are or may be present in the air in quantities sufficient to produce explosive or ignitable mix tures.

  Hazardous Process Piping (HPP). A process material piping or tubing conveying a liquid or gas that has a degreeof-hazard rating in health, flammability, or reactivity of Class 3 or 4, as ranked by the fire code.

  Health Facilities. [OSHPD 1, 1R, 2, 3, 4, 5 & 6] Build- ings specified within the statutory authority of the Depart- ment of Health Care Access and Information/Office of Statewide Hospital Planning and Development.

  Heat Pump. A refrigeration system that extracts heat from one substance and transfers it to another portion of the same substance or to a second substance at a higher temperature.

  Heat Recovery Ventilation (HRV) System. A device intended to remove air from buildings, replace it with outside air, and in the process transfer heat from the warmer to the colder airstreams.

  Heating Degree Day. A unit, based upon temperature difference and time, used in estimating fuel consumption and specifying nominal annual heating load of a building. For any one day when the mean temperature is less than 65°F (18°C), there exist as many degree days as there is Fahrenheit degrees difference in temperature between mean temperature for the day and 65°F (18°C).

  Heating Equipment. Includes warm air furnaces, warm air heaters, combustion products vents, heating air-distribution ducts and fans, and all steam and hot water piping, together with all control devices and accessories installed as part of, or in connection with, any environmental heating system or appliance regulated by this code.

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  DEFINITIONS

• CMC § 5003.2.2.2 Medium relevance — show source text

  5003.2.2.2 Additional regulations for supply piping for health-hazard materials. Supply piping and tubing for gases and liquids having a health-hazard ranking of 3 or 4 in accordance with NFPA 704 shall be in accordance with ASME B31.3 and the following:

  1. Piping and tubing utilized for the transmission of highly toxic, toxic or highly volatile corrosive liquids and gases shall have welded, threaded or flanged connections throughout except for connections located within a ventilated enclo

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  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  HAZARDOUS MATERIALS—GENERAL PROVISIONS

  sure if the material is a gas, or an approved method of drainage or containment is provided for connections if the material is a liquid. 2. Piping and tubing shall not be located within corridors, within any portion of a means of egress required to be enclosed in fire-resistance-rated construction or in concealed spaces in areas not classified as Group H occupancies.

  Exception: Piping and tubing within the space defined by the walls of corridors and the floor or roof above or in concealed spaces above other occupancies where installed in accordance with Section 415.11.7.4 of the California Building Code for Group H-5 occupancies.

  5003.2.3 Equipment, machinery and alarms. Equipment, machinery and required detection and alarm systems associated with the use, storage or handling of hazardous materials shall be listed or approved.

  5003.2.4 Installation of tanks. Installation of tanks shall be in accordance with Sections 5003.2.4.1 through 5003.2.4.2.1.

  5003.2.4.1 Underground tanks. Underground tanks used for the storage of liquid hazardous materials shall be provided with secondary containment. In lieu of providing secondary containment for an underground tank, an above-ground tank in an underground vault complying with Section 5704.2.8 shall be permitted.

  5003.2.4.2 Above-ground tanks. Above-ground stationary tanks used for the storage of hazardous materials shall be located and protected in accordance with the requirements for outdoor storage of the particular material involved.

  Exception: Above-ground tanks that are installed in vaults complying with Section 5303.16 or 5704.2.8 shall not be required to comply with location and protection requirements for outdoor storage.

  5003.2.4.2.1 Marking. Above-ground stationary tanks shall be marked as required by Section 5003.5.

  5003.2.5 Empty containers and tanks. Empty containers and tanks previously used for the storage of hazardous materials shall be free from residual material and vapor as defined by DOTn, the Resource Conservation and Recovery Act (RCRA) or other regulating authority or maintained as specified for the storage of hazardous material.

  5003.2.6 Maintenance. In addition to the requirements of Section 5003.2.3, equipment, machinery and required detection and alarm systems associated with hazardous materials shall be maintained in an operable condition. Defective containers, cylinders and tanks shall be removed from service, repaired or disposed of in an approved manner. Defective equipment or machinery shall be removed from service and repaired or replaced. Required detection and alarm systems shall be replaced or repaired where defective.

• CMC § 1315.2 Medium relevance — show source text

  Table 1315.2(27) Schedule 40 Metallic Pipe . . . . . . 322

  Table 1315.2(28) Semi-Rigid Copper Tubing . . . . . . 323

  Table 1315.2(29) Semi-Rigid Copper Tubing . . . . . . 324

  Table 1315.2(30) Semi-Rigid Copper Tubing . . . . . . 330

  Table 1315.2(31) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . . 326

  Table 1315.2(32) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . . 327

  Table 1315.2(33) Corrugated Stainless Steel Tubing (CSST) . . . . . . . . . . . . . . . 328

  Table 1315.2(34) Polyethylene Plastic Pipe . . . . . . . 329

  Table 1315.2(35) Polyethylene Plastic Pipe . . . . . . . 330

  Table 1315.2(36) Polyethylene Plastic Tubing . . . . . 331

  CHAPTER 14 PROCESS PIPING. . . . . . . . . . . . 333

  1401.0 General. . . . . . . . . . . . . . . . . . . . . 335

  1401.1 Applicability. . . . . . . . . . . . . . . . . . 335

  1402.0 Permit . . . . . . . . . . . . . . . . . . . . . . 335

  1402.1 General. . . . . . . . . . . . . . . . . . . . . 335

  1403.0 Plans Required . . . . . . . . . . . . . . . 335

  1403.1 General. . . . . . . . . . . . . . . . . . . . . 335

  1404.0 Workmanship . . . . . . . . . . . . . . . . 335

  1404.1 General. . . . . . . . . . . . . . . . . . . . . 335

  1405.0 Inspections . . . . . . . . . . . . . . . . . . 335

  1405.1 General. . . . . . . . . . . . . . . . . . . . . 335

  1405.2 Required Inspections . . . . . . . . . . 335

  1405.3 Other Inspections . . . . . . . . . . . . . 335

  1406.0 Pipe, Tubing, and Fittings. . . . . . . 335

  1406.1 General. . . . . . . . . . . . . . . . . . . . . 335

  1406.2 Hazardous Process

  Piping (HPP). . . . . . . . . . . . . . . . . 335

  1406.3 Special Requirements for HPP Gases . . . . . . . . . . . . . . . . . . . . . . 336

  CHAPTER 15 SOLAR ENERGY SYSTEMS. . . . 337

• CMC § 3.3.79.12.2 Medium relevance — show source text

  Grade. A reference plane representing the average finished ground level adjoining the building at exterior walls. Gravity Heating System. A heating system consisting of a gravity-type warm air furnace, together with all air ducts or pipes and accessory apparatus installed in connection therewith.

  Gravity-Type Floor Furnace. A floor furnace depending primarily on circulation of air by gravity. This classification also includes floor furnaces equipped with booster-type fans that do not materially restrict free circulation of air by gravity flow when such fans are not in operation. [NFPA 211:3.3.79.12.2] Grease. Rendered animal fat, vegetable shortening, and other such oily matter used for the purposes of and resulting from cooking, preparing foods, or both. [NFPA 96:3.3.29] Grease might be liberated and entrained with exhaust air or might be visible as a liquid or solid. Grease Filter. A removable component of the grease removal system designed to capture grease and direct it to a safe collection point. [NFPA 96:3.3.24.1] Grease Filter, Mesh-Type. A filter construction consisting of a net made from intersecting strands with a space between each strand. [NFPA 96:3.3.24.2] Grease Removal Devices. A system of components designed and intended to process vapors, gases, or air as it is drawn through such devices by collecting the airborne grease particles and concentrating them for further action at some future time, leaving the exiting air with a lower amount of combustible matter.

  Greasetight. Constructed and performing in such a manner as not to permit the passage of grease under normal cooking conditions. [NFPA 96:3.3.31]

  Ground-Heat Exchanger. An underground closed-loop heat exchanger through which a heat-transfer medium passes to and from a heat pump or other rated mechanical equipment. It includes the buried pipe and connecting main(s) up to and terminating with the building.

  Ground-Source Heat Pump. A term that is applied to a variety of systems that use the ground, groundwater, or surface water as a heat source and sink. The general terms include ground-coupled (GCHP), groundwater (GWHP), and surface-water (SWHP) heat pumps. Many parallel terms exist

  [e.g., geothermal heat pumps (GHP), geo-exchange, and ground-source (GS) systems] and are used to meet a variety of marketing or institutional needs.

  Grounding Electrode. A conducting object through which a direct connection to earth is established. [NFPA 70:100(I)]

  Groundwater. Water that exists beneath the earth’s surface.

  Groundwater Source. A geothermal energy system that uses the groundwater as a heat source or sink.

  210.0 – H –

  Hangers. See Supports.

  Hazardous Location. An area or space where combustible dust, ignitable fibers, flammable liquids, volatile liquids, gases, vapors, or mixtures are or may be present in the air in quantities sufficient to produce explosive or ignitable mix tures.

  Hazardous Process Piping (HPP). A process material piping or tubing conveying a liquid or gas that has a degreeof-hazard rating in health, flammability, or reactivity of Class 3 or 4, as ranked by the fire code.

• CMC § 31F-93 Medium relevance — show source text

  Piping that may be exposed to the low temperature of LNG or to the heat of an ignited spill, during an emer-_ gency where such exposure could result in a failure of the piping, shall comply with at least one of the following: (a) Made of material(s) that can withstand both the normal operating temperature and extreme temperature to which the piping may be subjected during the emergency

  2025 CALIFORNIA BUILDING CODE 31F-93

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  MARINE OIL TERMINALS

  (b) Protected by insulation or other means to delay failure due to extreme temperatures until corrective action can be taken by the operator. (c) Capable of being isolated and having the flow stopped where piping is exposed only to the heat of an ignited spill during the emergency 3. LNG pipelines shall be designed for cool-down with liquid nitrogen where the use of LNG is not possible. 4. All LNG drains should be located within a containment area or piped to a collection system or containment area. 5. LNG lines shall be analyzed for a start-up case where the top of the pipe is 90 degrees F warmer than the bottom of the pipe. The upward bowing of the pipe shall be limited to 1.25 inches. 6. Pipe supports, including any insulation systems used to support pipe whose stability is essential, shall be resistant to or protected against fire exposure, escaping cold liquid, or both if they are subject to such exposure. 7. Pipe supports for cold lines shall be designed to minimize excessive heat transfer, which can result in piping failure by ice formations or embrittlement of supporting steel. If icing up of piping and components is unavoidable, the weight of the accu- mulated ice shall be considered during piping and support design. 8. Valves shall comply with ASME B31.5 [12.5]. 9. Cryogenic valves in liquid cryogenic service shall not be installed in vertical lines. Valves in liquid cryogenic service shall be installed in horizontal lines with the stem in the vertical position or at least 45 degrees vertically from the horizontal centerline of the pipe. 10. All cryogenic valves (except butterfly valves, check valves and globe valves) shall have a body cavity relief to the “safe” side of the valve. All cryogenic valves with a body cavity relief shall be marked on the exterior of the body with a letter “V” and an arrow pointing to the direction of the venting side. 11. Thermal relief valves shall be installed to protect the equipment and piping from over pressuring as a result of ambient heat input to blocked in LNG or other light hydrocarbon liquids. 12. Cryogenic subsea pipeline designs shall be qualified by a certifying agency, acceptable to the Division, in a qualification program that demonstrates that the system has been designed, fabricated and can function as intended with safeguards provided as determined to be necessary.

  _**3112F.6 Mechanical components and systems.