What should be installed to prevent excessive pressure buildup in sections of LP gas pipe that can be isolated?

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To prevent excessive pressure buildup in isolated sections of LP gas piping, hydrostatic relief valves are the most appropriate choice. These valves are specifically designed to relieve pressure caused by thermal expansion of the gas or liquid in the pipeline, which can occur when the liquid heats up and expands.

In situations where a section of the gas piping is isolated, such as during a maintenance or repair procedure, heat can cause the gas to expand and increase pressure within that isolated section. The hydrostatic relief valves automatically open at a predetermined pressure, allowing the excess pressure to escape and thus preventing potential hazards like pipe bursts or catastrophic failures.

While pressure regulators are essential for maintaining downstream pressure within specified limits, they do not address the issues posed by thermal expansion in isolated sections. Relief valves generally serve a similar purpose but are not specifically designed for hydrostatic conditions, whereas check valves facilitate one-way flow and do not relieve pressure buildup.

This makes hydrostatic relief valves the ideal option to ensure safety and compliance with LP gas pipeline systems.

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