Chapter 58 — FLAMMABLE GASES AND FLAMMABLE CRYOGENIC FLUIDS
Section 5806
California Fire Code (Title 24, Part 9) · 2022 edition · updated 2026-09-10 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
5806.1 General. The storage and use of flammable cryogenic¶
fluids shall be in accordance with Sections 5806.2 through 5806.4.8.3 and Chapter 55.
5806.2 Limitations. Storage of flammable cryogenic fluids¶
in stationary containers outside of buildings is prohibited within the limits established by law as the limits of districts in which such storage is prohibited [JURISDICTION TO SPECIFY] .
5806.3 Above-ground tanks for liquid hydrogen.¶
Aboveground tanks for the storage of liquid hydrogen shall be in accordance with Sections 5806.3.1 through 5806.3.2.1.
5806.3.1 Construction of the inner vessel. The inner vessel of storage tanks in liquid hydrogen service shall be designed and constructed in accordance with Section VIII, Division 1, of the ASME Boiler and Pressure Vessel Code and shall be vacuum jacketed in accordance with Section 5806.3.2.
5806.3.2 Construction of the vacuum jacket (outer vessel). The vacuum jacket used as an outer vessel for storage tanks in liquid hydrogen service shall be of welded steel construction designed to withstand the maximum internal and external pressure to which it will be subjected under operating conditions to include conditions of emergency pressure relief of the annular space between the inner and outer vessel. The jacket shall be designed to withstand a minimum collapsing pressure differential of 30 psi (207 kPa).
5806.3.2.1 Vacuum-level monitoring. A connection shall be provided on the exterior of the vacuum jacket to allow measurement of the pressure within the annular space between the inner and outer vessel. The
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