GMAW Welding for B31.3
GMAW Welding for B31.3
(OP)
Can anyone comment on whether or not if GMAW welding is permitted for use in B31.3? Our company has WPS & PQR (for P#1 and P#8) on file approved for ASME Section IX. The WPS and PQR was approved by a CWI.





RE: GMAW Welding for B31.3
RE: GMAW Welding for B31.3
RE: GMAW Welding for B31.3
ASME Section IX has certain restrictions on the short circuitig mode of metal transfer that limits the thickness range for which you are qualified.
Short circuiting transfer produces rather limited heat input, thus prone to fusion type discontinuities unless the welder is properly trained and close attention to cleaning, joint preparation, and welding parameters are controlled.
The contractor must be aware of the limitations and which mode of metal transfer is being used.
Best regards - Al