Heavenside1925,
We are the end user. Fabrication is complete, the vessel is stamped and I do think it was an internal decision to build it to ASME Sect VIII instead of API standards. I came in late to this project and I don't have a good answer on why Sect VIII.
Originally, we were under the...
We have a disagreement on the NDE requirements for an Atmospheric Tank built to ASME Sect. XIII, SB-575 UNS N10276, P-43 material-Hastelloy. All parties agree that the exterior welds require PT on all welds. The disagreement is on the interior welds (longitudinal, circumferential and nozzle...
The weld was 'sprayed-for lack of a better term' during weld out. PWHT has not been performed. This weld had greater than 25% deposition so I'm not worried about root cracking but it was not controlled cooling as required in 'Interruption of Welding" It was a rapid cool down, therefore I think...
metengr,
Thanks for the feedback. Your advice seems reasonable. We don't have hardness test requirements on P22 that must be met, but comparing the results of the 'quenched weld' to a couple of welds on the same line that were not 'quenched' should provide valuable information. In some cases...
Hello All,
Code is ASME B31.1 2014.
Issue is a 32" P22 Sch60 pipe weld just below flush that had water inadvertently released and 'quenched' the weld enough to cause the heat treat chart to drop below the WPS inter-pass temp. The temp. dropped from 500F to 250F briefly. 400F-600F is WPS...
metengr and weldstan,
I appreciate the replies.
It's one of those questions that can't be found specifically in the codes (at least I don't think it can) but relies on experience, best practices and common sense...of which you both have plenty.
Thanks again.
Hello All,
We are missing a component that welds in-line on a VPR (vertical pipe rack) module being constructed in the fabrication shop. The component will not available until after the pipe rack is up-ended at site. It is now horizontal and will be shipped that way. ASME B31.1
We want to weld...
The test pressure isn't always 1.5 of design pressure or MAOP. Different codes have different test criteria. Some Classes in B31.8 are only 1.1, 1.25 or 1.4 of design pressure.
B31.3 states in 345.4.2
PT=1.5 PRr
where
P p internal design gage pressure
PT p minimum test gage pressure
Rr p ratio...
