A ___________ shall be installed in each section of piping and hose in which liquid LP-Gas can be isolated between shutoff valves so as to relieve the pressure that could develop from the trapped liquid to a safe atmosphere or product retaining section.

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The appropriate choice for this scenario is a hydrostatic relief valve. This type of valve is specifically designed to address the challenges posed by liquid LP-Gas that can become trapped in piping systems. When liquid LP-Gas is isolated between shutoff valves, there is a potential for pressure buildup if the liquid expands due to temperature changes. A hydrostatic relief valve is engineered to relieve this pressure by allowing the trapped liquid to escape to a safe atmosphere or a product-retaining section, thereby preventing dangerous situations such as ruptures or explosions.

A pressure relief valve, while similar, typically functions to relieve excess pressure from a system, but it is not specifically tailored for liquid LP-Gas isolation scenarios. An automatic shutoff valve is designed to shut off the flow of gas under specific conditions but does not provide a mechanism for pressure relief. A check valve is meant to prevent backflow in piping systems, but it does not relieve pressure and can actually contribute to trapping liquid in certain configurations.

The function and purpose of a hydrostatic relief valve are essential for maintaining safety in systems where liquid LP-Gas is situated, ensuring that any potential buildup of pressure is handled effectively, thereby safeguarding both the equipment and the individuals working with it.

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