What is the minimum burst pressure requirement for hose and metallic hose in CNG applications?

In CNG applications, the minimum burst pressure requirement for hose and metallic hose is designed to ensure safety and reliability. The correct answer, which indicates that the burst pressure must be at least four times the service pressure, is established to provide a significant safety margin. This means that if the hose is operating at its maximum service pressure, it should withstand four times that pressure without failure.

This level of safety margin is essential in high-pressure applications like CNG, where equipment is subjected to varying conditions, including temperature fluctuations and potential pressure surges. By having hoses that can handle four times the service pressure, the system is better equipped to prevent leaks or catastrophic failures that can occur due to unexpected pressure changes, wear, or material fatigue.

It’s important to recognize that a lower safety margin, such as equal to or twice the service pressure, would not provide sufficient protection. In practices concerning gas delivery, safety is paramount; therefore, adhering to the requirement of four times the service pressure helps ensure a robust safety standard that protects both the operator and the environment.