Which of the following is a key safety standard for refrigerant storage?

The key safety standard for refrigerant storage is the use of UL-approved containers. UL, or Underwriters Laboratories, is a safety certification organization that tests and certifies products for safety standards. Refrigerants are chemicals that can be hazardous if not stored properly, and using containers that have been certified by UL ensures they meet specific safety guidelines regarding pressure, chemical resistance, and durability.

UL-approved containers are designed to handle the unique properties and pressures associated with refrigerants, thus minimizing the risk of leaks or ruptures that could pose safety hazards. Proper storage is essential in preventing accidents that could lead to environmental harm or physical injury.

The other options do not meet the necessary safety standards. Glass containers may shatter and cause dangerous leaks, metal buckets might not be designed for high-pressure storage, and plastic bins are typically not suited for high-pressure refrigerants. These alternatives lack the rigorous testing and certification that UL-approved containers undergo, making them unsafe choices for refrigerant storage.