Texas Compressed Natural Gas (CNG) Delivery Truck Driver Practice Exam

In CNG applications, the minimum design pressure for connectors must be sufficient to handle the high pressures associated with compressed natural gas systems. A design pressure of 5,000 psig is established as the standard minimum because it is aligned with the typical operational pressures used in CNG applications, ensuring safety and reliability in the connections. Using connectors with this minimum design pressure ensures that they can withstand the stresses and potential fluctuations in pressure that may occur during operation. Higher design pressures, such as 7,500 psig or 10,000 psig, while technically stronger, are not necessary for standard CNG applications and could lead to unnecessary costs. Thus, 5,000 psig is recognized as the optimal minimum to ensure safe and effective operation without excess material costs or regulatory complications associated with using higher-rated connectors.