Which hazard statement is associated with using copper tubing in systems with acetylene?

Which hazard statement is associated with using copper tubing in systems with acetylene?

• A. Copper and acetylene will react and form explosive compounds.
• B. Copper is inert with acetylene.
• C. Only at high pressure.
• D. There is no hazard.

Answer: (A)

Acetylene can form explosive compounds with copper, so copper tubing in acetylene systems creates a real, dangerous hazard. Copper surfaces can react with acetylene to produce copper acetylide, a highly sensitive explosive that can detonate under shock, friction, or heat. This is why copper tubing is avoided for acetylene lines; safer metals like steel or Monel are used instead, and lines are kept intact and free of contamination. The idea that there’s no hazard, that copper is inert, or that the risk only exists at high pressure isn’t accurate—the explosive acetylide formation is the core safety concern with copper in contact with acetylene.

Acetylene can form explosive compounds with copper, so copper tubing in acetylene systems creates a real, dangerous hazard. Copper surfaces can react with acetylene to produce copper acetylide, a highly sensitive explosive that can detonate under shock, friction, or heat. This is why copper tubing is avoided for acetylene lines; safer metals like steel or Monel are used instead, and lines are kept intact and free of contamination. The idea that there’s no hazard, that copper is inert, or that the risk only exists at high pressure isn’t accurate—the explosive acetylide formation is the core safety concern with copper in contact with acetylene.