1) The placement location, height, and deviation of the entrance and exit must meet the requirements of the plan, and the connection should be firm and precise.
2) All manual valves installed on insulated pipelines must not have their handles facing downwards.
3) Before installing the valve, a surface inspection must be conducted, and the valve nameplate should comply with the provisions of the current national standard "General Valve Marking" GB 12220. Valves with a pressure greater than 1.0 MPa and a blocking effect on backbone pipes should undergo strength and precision performance tests before installation, and can only be used after passing the tests. During the strength test, the test pressure should be 1.5 times the nominal pressure, and the continuous time should not be less than 5 minutes. The valve shell and packing should have no leakage to pass the test. During precision testing, the test pressure is 1.1 times the nominal pressure; The test pressure should meet the requirements of GB 50243 for the continuous duration of the test, and it is considered qualified if there is no leakage on the sealing surface of the valve disc.
4) Handwheels, handles, and transmission mechanisms are not allowed to be used for lifting and collisions are strictly prohibited.
5) Gate valves with transmission mechanisms shall be installed according to the product utilization instructions.
