How to conduct pressure testing and leak detection for pipelines in engineering project construction? How to check for internal leaks in valves?
Thread Content
How to conduct pressure testing and leak detection for pipelines in engineering project construction? How to check for internal leaks in valves? For example, when the utility manager conducts a pressure test and closes all the branch valve, it is found that the main pipe cannot maintain its pressure; it is suspected that there is internal leakage in some of the branch valves. So how can one determine which branch valve has internal leakage?
Is there a drain pipe in each branch pipe? Check for the presence of liquid through the drain pipe
Valves have their own pressure testing standards, which are separate from the pipeline pressure testing
If the branch pipe is emptied first and then pressurized, and air is detected when the branch pipe is opened, it indicates that air is leaking in, meaning there is an internal leak in the valve at that location!
There are roughly several methods. The first is to measure the temperature difference before and after the valve to make a judgment; the second is to listen for any suspicious sounds. I’ve posted an in-depth article on how to determine if there is internal leakage in a valve – you can go to my homepage to read it
Why not conduct the pressure test together with the branch pipe?