What is required for every refrigerant cylinder?

Every refrigerant cylinder must have a pressure relief device to ensure safe handling and storage. This device is critical because it helps to prevent dangerous pressure build-ups that can occur if the cylinder is exposed to high temperatures or if the refrigerant inside expands. The pressure relief device is designed to release excess pressure, which protects both the cylinder and anyone handling it from potential hazards, such as explosions or ruptures caused by over-pressurization.

The presence of a pressure relief device is a standard requirement in safety regulations for handling refrigerants, ensuring that the cylinders can safely contain substances under pressure. This requirement aligns with best practices in the industry for the storage and transportation of high-pressure gases and liquids, prioritizing safety for technicians and the environment.

Other options, although they may sound relevant to refrigerant handling, are not standard or legally required for all refrigerant cylinders. For instance, temperature sensors may be useful in some applications but are not universal requirements. Similarly, the color coding of cylinders is more about identification and does not involve safety mechanisms like pressure relief devices. Additionally, linking a refrigerant cylinder to a vacuum pump is not necessary for the cylinder itself and is specific to certain HVAC applications, not a general requirement for all refrigerant cylinders.