1, safety valve should be installed upright and close to the protected equipment or pipe. If not close to the arrangement, the total pressure drop from the protected equipment or pipeline to the inlet of the safety valve shall not exceed 3% of the rated pressure of the safety valve.2 Safety valves shall be provided with an overhaul platform. Arrange the weight of the safety valve to consider when lifting the safety valve may be hoisted, if necessary, should be set boom. 3, safety valve inlet pipe should be used long radius elbow. 4, safety valve outlet pipe design should consider the back pressure does not exceed the pressure relief valve certain value. For ordinary spring-type safety valve, the back pressure does not exceed 10% of the rated pressure of the safety valve 5. When the medium discharged to the vent pipe or to the flare main pipe has condensate or condensable gas, the outlet of the safety valve should Higher than the mains; otherwise, liquid draining should be taken. 6, when the safety valve inlet and outlet pipe with cut-off valve should be used in a single gate valve, and lead seal open, the stem should be installed horizontally, so stem and valve plate connected pin corrosion or loose, the valve plate down . When the safety valve with bypass valve, the valve should be sealed off.
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