Pipeline pressure test problem? ? ?
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Pipeline pressure test issues: The place where the new pipeline and the old pipeline meet is to change the elbow of the old line into a tee. How can I test the pressure if there are no valves near the two old lines? Can a pressure test be performed before welding the tee? If there are three intersections with three connections, do we need to film all of them? (The pipeline is designed for diesel SHB grade 10%RT) Thank you all! ! !
That's right, the pressure test of the new pipeline should be completed before the meeting, and then the interface and the weld at the interface should be inspected for flaw detection.
Completely agree with what was said above and have nothing to add.
The pipeline can be pressure tested with nitrogen and a blind plate is added to the end. But remember to purge
A pressure test can be carried out before welding the tee, but the last two openings must be 100% non-destructive tested. It is best to obtain the consent of the design unit before implementing this plan.
4# Thanks to the common people, I have never encountered pressure testing with gas before! , there is no way to install the blind plate, we can only weld it.
2# yy7565 Are all three intersections required to be tested?
5# Silent Beauty Design Unit doesn’t care about anything
The second floor is right, this is how it is handled. This welding joint can only be photographed separately in the future, because the cost of photographing is very expensive compared to the pressure test that can inspect the beam welding joint at one time, so this welding joint has also become a golden joint (GOLDEN JOINT).