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  • CHAPTER55
    CRYOGENIC FLUIDS

    SECTION5501
    GENERAL

    5501.1 Scope.

    Storage, use and handling of cryogenic fluids shall comply with this chapter and NFPA 55. Cryogenic fluids classified as hazardous materials shall also comply with the general requirements of Chapter 50. Partially full containers containing residual cryogenic fluids shall be considered as full for the purposes of the controls required.

    Exceptions:

    1. 1.Fluids used as refrigerants in refrigeration systems (see Section 606).

    2. 2.Liquefied natural gas (LNG), which shall comply with NFPA 59A.

    Oxidizing cryogenic fluids, including oxygen, shall comply with Chapter 63, as applicable.

    Flammable cryogenic fluids, including hydrogen, methane and carbon monoxide, shall comply with Chapters 23 and 58, as applicable.

    Inert cryogenic fluids, including argon, helium and nitrogen, shall comply with ANSI/CGA P-18.

    5501.2 Permits.

    Permits shall be required as set forth in Section 105.6.