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SESK: Stuff Everyone Should Know · sesk.info/weld-acetylene-valve-up

How should acetylene cylinders be stored?

Valve end up.

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  1. Valve end up ✔
  2. Valve end down
  3. On their side

Why: Acetylene in a cylinder is dissolved in a liquid solvent. Keeping the cylinder upright keeps that liquid away from the valve. OSHA says acetylene cylinders shall be stored valve end up.

Huh, didn't know that: OSHA also says fuel-gas cylinders must be placed with valve end up whenever they are in use.

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References

Answer: Valve end up. Acetylene in a cylinder is dissolved in a liquid solvent. Keeping the cylinder upright keeps that liquid away from the valve. OSHA says acetylene cylinders shall be stored valve end up.

  1. OSHA 29 CFR 1910.253 Oxygen-fuel gas welding and cutting www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.253
    Acetylene cylinders shall be stored valve end up.
    Checked 2026-10-10.

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