SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/weld-use-no-oil-gauge

What words are marked on the gauges of oxygen regulators?

USE NO OIL.

Start playing free

  1. OXYGEN ONLY
  2. DO NOT DROP
  3. USE NO OIL ✔

Why: Oil and pure oxygen together can burn violently. The gauge marking warns users not to oil the regulator or its fittings.

Huh, didn't know that: OSHA requires pressure-reducing regulators to be used only for the gas and pressures they are intended for.

The dad joke
What did the thermometer say to the graduated cylinder? You may have graduated, but I've got many degrees.
Like this card?
Play the game

References

Answer: USE NO OIL. Oil and pure oxygen together can burn violently. The gauge marking warns users not to oil the regulator or its fittings.

  1. OSHA 29 CFR 1910.253 Oxygen-fuel gas welding and cutting www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.253
    Gages on oxygen regulators shall be marked “USE NO OIL.”
    Checked 2026-10-11.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game

Trades & ShopWhich gas must never be used to ventilate a confined space where welding is done?Trades & ShopWhy must oxygen cylinders never be handled with oily hands or gloves?Trades & ShopWhat polarity does MIG welding of mild steel use?

That's stuff everyone should know.