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Subchapter 7. General Industry Safety Orders
Group 20. Flammable Liquids, Gases and Vapors
Article 138. Hydrogen

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§5494. Design Considerations at Specific Locations.

(a) Roadways and yard surfaces located below liquefied hydrogen piping, from which liquid air may drip, shall be constructed of noncombustible materials.

(b) If protective walls are provided, they shall be constructed of noncombustible materials and in accordance with the provisions of the definition of "Outdoor Location" (See Section 5415) as applicable.

(c) Electrical wiring and equipment shall comply with Sections 5489 (a) and (b).

(d) Adequate lighting shall be provided for nighttime transfer operation. (Title 24, T8-54954).


1. Amendment of subsections (b) and (c) filed 3-2-76; effective thirtieth day thereafter (Register 76, No. 10).

2. Amendment filed 7-16-76; effective thirtieth day thereafter (Register 76, No. 29).

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