During an initial pressure test, what should be the test pressure gas?

The test pressure gas during an initial pressure test is determined by safety standards and regulations to ensure that the system can withstand operational pressures plus a margin for safety. The requirement of 1.5 times the working pressure, but not less than 150 psi, addresses the need to evaluate the integrity of the gas line system under conditions that exceed normal operating conditions. This ensures that any potential weaknesses or defects in the piping or fittings are identified before the system is put into operation.

By setting a minimum threshold of 150 psi, this guideline ensures that even systems with a lower working pressure are subjected to adequate stress testing. Therefore, using 1.5 times the working pressure provides a balance of safety and practicality, allowing for thorough verification of the installation's durability and leak resistance, which is essential in maintaining the safety of medical gas systems.