A pressure test is a way to guarantee your equipment’s integrity in a non-destructive way. The pressure can be applied to pipelines, gas cylinders, fuel tanks, and many other items that require pressure in a manner that is critical to your company’s ability to maintain its work and production schedule. The pressure test allows the technician to confirm that your system is rated for the pressure needed and that there are no leaks in the pipes or tanks. The pressure may be tested with water, gas, or dry nitrogen. Here are the three ways you can prepare for a pressure test.
1. Joint Testing
Joints are critical to proof pressure and over range capacity tests. That means that the pressure exerted can be sent without altering the performance of the device, even though the upper limits may be specified and reached. When doing any joint testing, all joints should be uncovered, including any weld spots, and then examined during and after the test.
2. Expansion Joint Testing
Because of the special nature of the expansion joint, testing should be done with a temporary type of restraint applied to the joint to prevent over expansion and distortion when under the pressure load test. If a heavy liquid is used for the test, special care should be taken to prevent excess weight if the expansion joint hangs down.
3. Temporary Support Testing
If your system is designed for gas or vapors, temporary supports may be needed if the test medium used is liquid. The excess weight of the liquid compared to a gaseous form could send the system into a failure due to the load.
Your contractor or technician can help you design a pressure test that adequately measures your system without over exertion of piping or tanks. Before beginning tests, make sure the equipment you are testing is disconnected for any piping not being tested.