What is the distance from a liquid transfer's shutoff valve that requires a hydrostatic relief valve?

The requirement for a hydrostatic relief valve being located at the valve itself emphasizes the importance of safety in the handling and transfer of liquefied petroleum gas (LP gas). A hydrostatic relief valve is designed to relieve pressure that could build up in the system if the temperature changes, allowing for the expansion of the liquid gas. When the valve is positioned directly at the shutoff valve, it ensures that any potential pressure build-up is immediately addressed at the source, which minimizes the risk of overpressure scenarios that could lead to equipment failure or hazardous situations.

In this context, positioning the relief valve at the valve itself creates a direct line of defense against pressure increases, ensuring that the system functions safely and efficiently. This proactive measure aligns with regulatory standards and best practices in the LP gas industry to maintain safety at every stage of the liquid transfer process.