What is the maximum operating pressure for piping that contains liquid LP-gas and requires hydrostatic relief valves?

The maximum operating pressure for piping that contains liquid LP-gas, which also requires the installation of hydrostatic relief valves, is recognized as 350 psig. This standard is established to ensure safety and effective management of the pressures associated with liquid propane systems. Hydrostatic relief valves serve as critical safety devices designed to relieve excess pressure that can occur within these systems, preventing potential failures that could lead to leaks or catastrophic failures.

Recognizing that the other pressure values exceed this standard is important; any higher pressures would necessitate different safety measures and potentially different equipment. By setting the maximum operating pressure at 350 psig, industry regulations align safety requirements with the operational characteristics of propane gas systems, ensuring that these systems can withstand typical operating conditions while minimizing risks.