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

Article 138. Hydrogen

• §5465. Gaseous Hydrogen at Consumer Sites.
• §5466. Design of Hydrogen Systems.
• §5467. Safety Relief Devices.
• §5468. Piping, Tubing and Fittings.
• §5469. Equipment Assembly.
• §5470. Marking.
• §5471. Testing.
• §5472. Location of Gaseous Hydrogen Systems.
• §5473. Specific Requirements.
• §5474. Design Considerations at Specific Locations.
• §5475. Separate Buildings.
• §5476. Special Rooms.
• §5477. Operating Instructions.
• §5478. Maintenance.
• §5480. Liquefied Hydrogen Systems at Consumer Sites.
• §5481. Design of Liquefied Hydrogen Systems.
• §5482. Supports.
• §5483. Marking.
• §5484. Safety Relief Devices.
• §5485. Piping, Tubing and Fittings.
• §5486. Equipment Assembly.
• §5487. Testing.
• §5488. Liquefied Hydrogen Vaporizers.
• §5489. Electrical Systems.
• §5490. Bonding and Grounding.
• §5491. Location of Liquefied Hydrogen Storage.
• §5492. Specific Requirements.
• §5493. Handling of Liquefied Hydrogen Inside Buildings Other Than Separate Buildings and Special Rooms.
• §5494. Design Considerations at Specific Locations.
• §5495. Separate Buildings.
• §5496. Special Rooms.
• §5497. Operating Instructions.
• §5498. Maintenance.

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