How should materials and instruments be stored for B28 work?

• A. In plastic bags left in the sun.
• B. In open steel drums near ignition sources.
• C. In any cabinet, regardless of spark risk.
• D. In approved, non-spark-producing containers away from ignition sources; maintain cleanliness and compatibility with refrigerants.

Answer: (D)

Flammable-refrigerant work requires preventing ignition and chemical issues by using approved, non-spark-producing containers and placing them away from ignition sources, while keeping everything clean and compatible with the refrigerants in use. Using approved containers minimizes contact with materials that could spark, overheat, or react with the refrigerants. Keeping storage away from ignition sources reduces the chance that any vapors or residues could ignite. Maintaining cleanliness prevents contamination that could become a fuel or cause compatibility problems with seals, lubricants, or refrigerants. Using plastic bags in the sun risks degradation and heat buildup; open steel drums near ignition sources create obvious ignition hazards; and storing in any cabinet without regard to spark risk or compatibility can expose materials to heat, sparks, or reactive conditions.