Smallest allowable groove angle - 1/4" plate field weld
Smallest allowable groove angle - 1/4" plate field weld
(OP)
I'm having a 1/4" plate welded to a bin cone (angle of 15 degrees to the vertical). I'm wondering if 15 degrees is sufficient for a CJP weld of relatively thin material, or if joint prep is required to take it to 30 degrees





RE: Smallest allowable groove angle - 1/4" plate field weld
RE: Smallest allowable groove angle - 1/4" plate field weld
RE: Smallest allowable groove angle - 1/4" plate field weld
If you absolutely HAVE TO, you can use a 15 deg prep angle IF you have a good welder with good access, then you can expect an adequate weld most of the time.
You SHOULD allow (require!) two 30 deg angles so an average welder can do the job under average access conditions without significant failures IF YOU CAN do so.
RE: Smallest allowable groove angle - 1/4" plate field weld
RE: Smallest allowable groove angle - 1/4" plate field weld
We used to hang a noose from the workshop beams on the slim chance a design engineer who seemed to be from another planet actually visited our workshop.
Give your contractor (who probably has a much better idea of what he is doing than you have) a perfect option.
Nominate the joint as CJP and let them decide the included angle.
RE: Smallest allowable groove angle - 1/4" plate field weld
I suggest taking a look at AWS D1.1 for a prequalified groove detail that suits your needs. Any of the details listed for SMAW can be used with either FCAW, GMAW, as well as SMAW.
If you do nothing else, if possible, consult with the contractor that will be doing the work. Ask the contractor if he has a preference.
Best regards - Al