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Gas welding light work up to 1/8 inch uses which shade in OSHA's guide?

Shade 4 or 5.

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  1. Shade 10
  2. Shade 14
  3. Shade 5 ✔

Why: Gas flames are much dimmer than electric arcs, so the lenses are lighter. OSHA lists shade 4 or 5 for light gas welding up to 1/8 inch.

Huh, didn't know that: For heavy gas welding on 1/2 inch metal and over, the guide lists shade 6 or 8.

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How can flames afford to be so bright? Fire works.
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References

Answer: Shade 5. Gas flames are much dimmer than electric arcs, so the lenses are lighter. OSHA lists shade 4 or 5 for light gas welding up to 1/8 inch.

  1. OSHA 29 CFR 1910.252 General requirements, welding, cutting and brazing www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.252
    Gas welding (light) up to 1 ⁄ 8 inch 4 or 5
    Checked 2026-10-11.

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