What is one of the requirements for pressure relief devices?

Pressure relief devices are essential safety components in systems that contain gases or liquids under pressure. Their primary function is to prevent potentially dangerous situations by releasing pressure when it exceeds a predetermined level. One of the crucial requirements for these devices is that they must be able to withstand maximum expected pressures. This ensures that they can safely manage the pressures within a system without failing or rupturing, thereby protecting the integrity of the entire system and ensuring safety.

In the context of safety regulations and standards, it is vital that pressure relief devices are designed and tested to handle the highest pressures that the system may encounter. This not only helps prevent leaks and failures but also ensures compliance with safety codes that govern the use of pressurized systems, such as those involving Compressed Natural Gas (CNG).

The other options do not align with the specific requirements for pressure relief devices. For instance, while manual operation might be a feature in some situations, it is not a requirement for pressure relief devices, which are typically designed to operate automatically without the need for manual intervention. Similarly, temperature control is not a standard requirement for these devices, as their primary task revolves around pressure management. Lastly, positioning at the bottom of the cylinder is not a universal standard, as the placement may vary depending on