Is it necessary to install an exhaust at the high point on the π-bend of the pipe tray?
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When installing π-bends on pipe racks, they sometimes end up at a higher level than the horizontal sections; is it necessary to install exhaust valves at these π-bends? It’s still just the large pipes; it seems that if the pipes aren’t very large, there shouldn’t be much air at high points like those created by π-shaped bends I’d like to ask everyone for advice, thank you
High and low points of pipelines, Haichuan Chemical Industry Forum website - https://bbs.hcbbs.com/thread-1307968-1-1.html
It depends on what the medium in the pipeline is. If the medium is gas, and a discharge valve is installed solely for pipeline pressure testing, it is not necessary to add one for media that are highly prone to leakage
It is necessary to arrange for high-point venting; after pressure testing with hazardous media, the vent valve should be replaced with a blind flange to prevent leaks and reduce the number of potential leakage points
I have seen a certain pipeline, elevated and over ten kilometers long, equipped with hundreds of bell-type compensators, each of which has a high-point vent valve. But when it was finally built, none of them were there.
Temporary ones can be set up and welded in place after pressure testing.
Temporary ones can be set up and welded in place after pressure testing.
Temporary ones can be set up and welded in place after pressure testing.
Temporary ones can be set up and welded in place after pressure testing.
Temporary ones can be set up and welded in place after pressure testing.