Recovery cylinders must be approved by which authority?

Recovery cylinders must be approved by the Department of Transportation (DOT). This is because recovery cylinders are subject to safety regulations that ensure they can safely contain refrigerants under high pressure. The DOT sets standards for the design, construction, and testing of these cylinders to prevent accidents, such as ruptures or leaks, during transport and use.

The DOT approval is crucial for ensuring that the cylinders are made from suitable materials and can withstand the conditions they will be exposed to in the field. Additionally, the DOT regulates the labeling and markings on the cylinders to provide vital information for handling and using them safely.

While the Environmental Protection Agency (EPA) oversees regulations related to the handling and disposal of refrigerants to protect the environment, it does not specifically approve the design of recovery cylinders. The Occupational Safety and Health Administration (OSHA) focuses on workplace safety and health standards but does not handle cylinder approval either. Local government regulations may enforce additional safety measures but are not the primary authority governing the approval of recovery cylinders.