Chapter 55 of the Oklahoma adopted IFC® 2018 is adopted with the following modification: Section 5501.1 Scope. This section has been modified to add a third exception for liquefied natural gas (LNG) facilities for LNG vehicular applications to comply with Chapter 23 and NFPA® 52. This section has been modified to read: 5501.1 Scope.

1. (1) 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. (A) Fluids used as refrigerants in refrigeration systems (see Section 605).
   2. (B) Liquefied natural gas (LNG), which shall comply with NFPA® 59 A.
   3. (C) LNG facilities for LNG vehicular applications, which shall comply with Chapter 23 and NFPA® 52.
2. (2) Oxidizing cryogenic fluids, including oxygen, shall comply with Chapter 63, as applicable.
3. (3) Flammable cryogenic fluids, including hydrogen, methane, and carbon monoxide, shall comply with Chapters 23 and 58, as applicable.
4. (4) Inert cryogenic fluids, including argon, helium and nitrogen, shall comply with ANSI/CGA P-18.

Reserved at 37 Ok Reg 890, eff 8-3-20 (emergency)

Amended and renumbered from 748:20-3-13.3 at 38 Ok Reg 2611, eff 9-14-21