I built a high-pressure manifold – should I do heat treatment first, or pressure testing first?
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This post was last edited by Thank goodness you're here on 2017-8-3 at 10:18. It involves a high-pressure manifold; in simple terms, it means welding several pipe sockets onto the pipeline, sealing both ends with pipe caps, with a pressure of over 50 MPa. Then, there are various opinions on whether heat treatment or pressure testing should be done first. I’ll listen to what everyone has to say; after all, I’m not an expert either.
First carry out heat treatment followed by hydrostatic testing; just like in flaw detection, it is necessary to ensure that the welds are of acceptable quality before checking the strength! Heat treatment is also used to eliminate the stresses generated during welding or shaping!
First perform heat treatment, then flaw detection, and finally pressure testing.
Oh, it was done a few years ago by another third-party company; I remember that pressure testing was carried out first, followed by heat treatment.
With such high pressure, is it a water injection pipeline?
This is a clear requirement specified in the fixed-volume regulations; I wonder if yours is a boiler? Pipes? Still a container? But the principle should be the same, right?
I think if I lack confidence, I can try to hold back for now
No, it’s used for pressure relief during pressure testing.
Oh oh oh, thank you; this is exactly the evidence I need. However, I designed it in accordance with ASME B31.3.
It’s either a matter of confidence, or it needs to be discussed; after all, it has been done before, and if the welding quality is good this time, there should be no problems.