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HS&E PFW practice question: Hot work, cylinders and pressure (3 of 5)

E. Specialist: HVACR – pipefitting and welding A free question from our original HS&E PFW practice exam. Try it, then open the answer to see why each option is right or wrong.

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A compressed air system for testing pipework runs at 7 bar.

Is compressed air covered by PSSR?

Choose one answer.

  1. A. Only above 100 bar
  2. B. Only if it is used outdoors
  3. C. Yes, above 0.5 bar
  4. D. No, air is never a pressure hazard
Show the answer and explanation

Answer: C

  • A. Wrong: Wrong. The threshold is 0.5 bar.
  • B. Wrong: Wrong. Location doesn't matter.
  • C. Right: Right. HSE says PSSR covers compressed or liquefied gas, including air, at more than 0.5 bar above atmospheric pressure.
  • D. Wrong: Wrong. Compressed air above 0.5 bar is covered.

Explanation

PSSR covers compressed gases, including air, above 0.5 bar.

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