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Subchapter 7. General Industry Safety Orders
Group 20. Flammable Liquids, Gases and Vapors
Article 138. Hydrogen
Group 20. Flammable Liquids, Gases and Vapors
Article 138. Hydrogen
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§5471. Testing.
After installation, all piping, tubing and fittings shall be tested and proved hydrogen gas tight at maximum operating pressure.
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