Can valves be installed during the hydraulic testing of pipes?
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Can valves be installed during the hydraulic testing of pipes?
Pipeline pressure testing must be carried out in conjunction with valve pressure testing; the purpose of this testing is mainly to verify whether components such as welds, flanges, and valve seals meet the required standards. The individual pressure testing of valves is also divided into two types: one is to check the tightness between the valve stem and the valve port inside the valve, and the other is to test whether the dynamic seal between the valve stem and the valve body is up to standard when the valve is opened. These are all tests that need to be carried out step by step. For reference.
It depends on the type of valve and the test pressure for the pipeline. If the test pressure for the valve is equal to that of the pipeline, they can generally be pressurized together; however, if the test pressure for the pipeline is higher than that of the valve, it is generally not recommended to pressurize them together. There are also certain special valves that cannot be pressurized along with the pipeline
The method for calculating the test pressure of pipes is different from that of valves
Control valves, instrument valves, check valves, etc. are not pressurized together with the pipes; they are included in the tightness test at the end
Is the pipeline test pressure higher than the valve test pressure? It should be rare, otherwise if the pipes don’t leak, how would leaks in the valves be dealt with?