For pipeline pressure testing in modularly constructed PAUs, how should the ends of the pipelines be sealed?
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As the title says. There has always been a question: during the construction of large modules (such as PARs), how can the process pipelines be pressure-tested before they leave the factory? Because the pipelines in the module should be welded on-site. That means there are no valves or flanges installed on the pipes in the ductwork; so how can the pipelines be sealed during pressure testing?
It’s a normal pressure test; just seal the blind flange with a flange； For those without flanges, a section of bare pipe is left to allow for welding of a pipe cap for pressure testing, or a weld-free pressure-testing plug can be used.
This post was last edited by we11we11 on 2021-6-6 at 17:40. Is pressure testing before leaving the factory necessary? Can it be done after everything has been installed on site? If pressure testing must be carried out before leaving the factory, it should be done using a blind flange as mentioned above, with the bare pipe welded to a pipe cap or end closure – I’m not sure if that’s correct. If there isn’t even a flange available, then the only option is to weld an end closure for the pressure testing?