I see this has been discussed before but with no real answer. The background is: In accordance to B31.3 Table 323.3.1 A-4 requires that a specimen is prepared as "One required for each welding procedure, for each type of filler metal (i.e., AWS E-XXXX classification), and for each flux to be...
LittleInch thank you for your personal opinion. And although I do agree with you it is not much help in answering my question. So again, Is there any exemption/code case/interpretation that allows us to perform the weld, perform the hydro, and cut out the weld. All without PWHT?
We need to weld a temporary cap (P1) to a (P4) pipe for a shop hydro-test of a spool piece. The only qualified weld procedure we have requires PWHT. Is there any exemption/code case/interpretation that allows us to perform the weld, perform the hydro, and cut out the weld. All without PWHT...
We have a B31.1 weld (pipe to nozzle) to a very short nozzle on a section VIII vessel which is going to require alot of heat to go into the shell to meet the PWHT requirements. B31.1 is very vague on PWHT and temperature gradients but section VIII UW-40 is very clear about harmful gradients...
We recently purchased a cabin in central Canada. The foundation (which is identical as all the neighboring cabins) is simply wood blocks on the ground. The soil is primarily sand. I want to raise the cabin to approx 3' from ground level and insulate the foundation walls. Drilling piles to below...
We have welded a stringer pass (3/32)down hand on a SA210C waterfilled boiler tube with 7018A1. Single stringer about 2.5" in length. The welding was to repair an area of undercut (membrane to tube). Question is what effect on the base material and possible future failure could this cause? Our...
Congrats 67fordgalaxie500. Welcome to the club.
About your books. I would keep them. They are great reference and you will be kicking yourself later for selling them when your in a bind.
Depending on the size of the pipe,I have seen anywhere from 2 x Diameter for small (under 6") pipe/tube or down to 6" on large diameter pipe. The codes don't specify a minumum distance but good engineering and welding practices do. Most clients (all Canadian) that I work with have a standard of...
Usually when dealing with interpass you are trying to limit your maximum interpass temperature, so you would want to measure on the hottest part of the heat affected zone which would be the weld itself. Depending on the configuration of the weld you could use temperature indicator crayons (temp...
If you are stripping back the overlay it is a good idea to verify that you got it all with a copper sulfate solution. Spray or swab on the weld area and remove any traces of the overlay revealed by the etchant.
A large amount of the ASME materials are based on ASTM materials and as such can be used. In Section II of ASME for the appropriate material it will say if the material is equivalent to the ASTM material. Here is the excerpt form SA106 (Identical with ASTM A 106-95 except for editorial...
Calibrate a steel ruler?? I have had ISO auditors lok at me pretty funny for calibrating stuff such as rulers,tape measures.For anything basic, such as a ruler I would put a limitation on it, ie.. calibrated at first use and then only if damaged (no regular interval), or at first use then...
