Is this weld possible?
Is this weld possible?
(OP)
Hey Guys;
I have 61" circular plate that I will be adding stiffeners which are 5/8" thick x 12" and they vary in depth. See attached sketch.
I am the structural checking the calcs, which are fine, but is this constructable?
The spacing between the stiffeners are less than 4", and you would have to go 12" deep, can you get the gun in there at the correct angle?
Thanks
I have 61" circular plate that I will be adding stiffeners which are 5/8" thick x 12" and they vary in depth. See attached sketch.
I am the structural checking the calcs, which are fine, but is this constructable?
The spacing between the stiffeners are less than 4", and you would have to go 12" deep, can you get the gun in there at the correct angle?
Thanks





RE: Is this weld possible?
If not, you could cut through holes in the circular plate and place the stiffeners through them, and weld from the other side, either a slot weld if the stiffener cannot project through, or a fillet weld if they can.
You will not be able to get a good weld as per your sketch.
RE: Is this weld possible?
Revise your plate/stiffener design. Having this many stiffeners results in poor constructability.
RE: Is this weld possible?
Thank you for the response.
RE: Is this weld possible?
RE: Is this weld possible?
I do not see a problem standing the resultant out of flatness on the other side.
Thanks
RE: Is this weld possible?
RE: Is this weld possible?
The stiffeners are 12" high with a 4" gap.
Regards
RE: Is this weld possible?
RE: Is this weld possible?
Increase the thickness of the plate and re-design the width of the stiffeners to reduce the number needed. This should not be that difficult to do.
RE: Is this weld possible?
rmw
RE: Is this weld possible?
Dik
RE: Is this weld possible?
It is very difficult to give a clear cut answer on your situation. Disregarding all other possible issues, the stiffeners can be welded as long as the hand can reach the height of the stiffeners. Someone has to be standing inside the pipe while welding which is not too healthy (it seems there is no end to your pipe above the round plate and stiffeners.
I would not recommend one sided welds due to weld shrinkage without a proper cooling rate that would cause weld shrinkage and therefore tilted stiffeners especially if this is done in the field and not in the shop, stay with two sided filet welds for a balanced weld shrinkage stress.
I also do not like the fact that you are trying to fit a round cut plate inside a pipe and then welding it on both sides (another accessibily issue from the other side inside the pipe). If possible, try to cut the pipe, install a very thick cap plate without stiffeners and then weld the other pipe section to the protruding cap plate from outside the pipe.
Hope this helps
RE: Is this weld possible?
I stated:
Quote
If possible, try to cut the pipe, install a very thick cap plate without stiffeners and then weld the other pipe section to the protruding cap plate from outside the pipe.
Unquote
If the cap plate becomes too thick due to the 5 foot span, (like thicker than 4 inches), then you can add a single gusset stiffener plate in the center of the pipe against the 62 inch diameter cut plate, the gusset plate will also be 62 inches wide and will be fished between the pipe wall slots on both sides of the pipe. All pipe welding for the cap plate and the stiffener gusset weld will then be filet welds from outside of the pipe. The pipe weld to the cap plate can be partial penetration with enough root face to eleminate the backer rod requirement.
RE: Is this weld possible?
RE: Is this weld possible?
RE: Is this weld possible?
Learned a lot, thanks
Tinguindin.