Pipeline inspection issues
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Dear experts: Should non-destructive testing be carried out first on well-installed process pipelines, or should hydraulic testing be done first? What are the reasons for this? Thank you!
Non-destructive testing should be carried out first, followed by a hydrostatic test. If a hydrostatic test is carried out first, high-pressure water will be forced out from the damaged part of the pipe, posing a serious danger.
As for what kind of inspection is done on pipelines, pipelines generally do not undergo hydrostatic testing; only the welds are inspected. Pipelines carrying high-pressure or toxic fluids are subject to non-destructive testing, while ordinary pipelines can be tested using kerosene penetration testing.
Hehe, it has to be done; if there are any damages, then it’s an unqualified pipe. How can it be called a pressure pipeline if it can’t even withstand water pressure! !
Of course, non-destructive testing must be carried out first to ensure the quality and strength of the weld seam, followed by strength testing
Ultrasonic non-destructive testing comes first, followed by hydraulic pressure
The quality of the pipes is inspected before they leave the factory; for pressure pipes, it is sufficient to provide a material certificate. In actual production, many pipes carry fluids that are high-temperature or toxic, making hydraulic testing difficult or even impossible to carry out.