Compressed Natural Gas (CNG) Certification Practice Exam

The minimum design pressure for fittings on the hose is 5,000 psig, which is a standard requirement for ensuring the safety and integrity of the hose and its fittings when transporting or handling compressed natural gas (CNG).

The fittings must be capable of withstanding high pressures to prevent leaks, ruptures, or failures that could endanger personnel or equipment. A design pressure of 5,000 psig allows for a significant margin above typical operating pressures, which enhances reliability and safety during usage. It ensures that even under maximum load conditions, the fittings will perform without the risk of failure, maintaining a secure connection throughout the system.

Lower design pressures, such as 1,000 psig or 3,000 psig, would not provide the necessary safety margin needed for the demands of CNG applications, where pressures can reach high levels. Choosing fittings designed for 5,000 psig ensures compliance with industry standards and enhances the overall resilience of the assembly.