Piping, tubing, and fittings must withstand a hydrostatic test of how many times the rated working pressure?

The correct answer is based on industry standards for the testing of piping, tubing, and fittings in Compressed Natural Gas (CNG) systems, which require these components to be able to withstand a hydrostatic test that is typically set at four times the rated working pressure. This rigorous testing ensures that the materials can safely handle not only the standard operating conditions but also unexpected surges in pressure that may occur during operation.

Hydrostatic testing is essential for verifying the integrity of the system, ensuring that there are no leaks and that the system components can endure the maximum pressures they may be subjected to over time. By requiring a test at four times the rated working pressure, manufacturers and regulators ensure a significant safety margin, which enhances the overall safety and reliability of the CNG infrastructure.