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Safety valves should be installed in an upright position and as close as possible to the equipment or piping they are protecting. If this is not feasible, the total pressure drop along the piping from the protected equipment or pipe to the safety valve inlet must not exceed 3% of the set pressure. This ensures optimal performance and reliable operation under relief conditions. An overhaul platform should be provided for the safety valve to facilitate maintenance and inspection. When planning the installation, consider the weight of the safety valve and whether it will need to be lifted. If necessary, a hoist or boom should be installed to assist with lifting operations safely. The inlet piping of the safety valve should use long-radius elbows to minimize flow resistance and reduce turbulence, which can affect the valve's response and accuracy. The outlet piping of the safety valve must be designed to account for back pressure. For standard spring-loaded safety valves, the back pressure should not exceed 10% of the set pressure. Excessive back pressure may affect the valve’s ability to open fully and discharge the required flow rate. When discharging into a vent line or a flare system, and the medium contains condensate or condensable gases, the safety valve outlet should be positioned above the main line. If this is not possible, proper drainage measures must be implemented to prevent liquid accumulation and potential blockage. For safety valves discharging into a closed system, the outlet piping should be connected at a 45-degree angle to the top of the discharge manifold. This helps prevent condensate from flowing back into the branch line and also reduces the back pressure on the safety valve, ensuring more accurate and consistent operation. When shut-off valves are installed on both the inlet and outlet of the safety valve, a single-gate valve should be used. The valve should remain open and sealed to prevent accidental closure. The stem should be installed horizontally to avoid the valve disc from falling off if the stem becomes eroded or loose. If a bypass valve is provided, it should be kept closed and properly sealed to prevent unintended flow during normal operation.

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