Weld bead callout on a print
Weld bead callout on a print
(OP)
If I have a .06" callout for a weld on a print, how would that be measured?
I have an idea, but.......
Thanks for the help.
Mike
I have an idea, but.......
Thanks for the help.
Mike





RE: Weld bead callout on a print
RE: Weld bead callout on a print
We have a thin wall pipe welded into a threaded fitting, and the callout is where the pipe is pressed into the fitting and then welded.
Mike
RE: Weld bead callout on a print
RE: Weld bead callout on a print
Or is the real question how to measure a weld that itty-bitty?
Hg
Eng-Tips guidelines: FAQ731-376
RE: Weld bead callout on a print
I would assume all he is trying to
do is assure that they have a leak
proof seal with the welding.
RE: Weld bead callout on a print
diamondjim, we are the customer. Along with the weld callout there is also a requirement to be gas tight.
Thanks
Mike
RE: Weld bead callout on a print
I probably am in error, but I have always
treated these as min requirements as to
welding specs. Machining tolerance requirements
do not apply to welding. Great question!
RE: Weld bead callout on a print
Thanks
Mike
RE: Weld bead callout on a print
RE: Weld bead callout on a print
RE: Weld bead callout on a print
BillPSU, would it be possible for you to give me a condensed version of this AWS D1.1?
Thanks
Mike
RE: Weld bead callout on a print
If the weld is convex, you're okay in terms of effect on weld throat size as calculated from leg size, though perhaps the profile might be problematic in terms of stress concentrations. AWS D1.1 isn't appropriate for very thin material. You could try AWS D1.3, the sheet code, but it sounds like you might need a pressure vessel code.
If by "not knowing where the limits of the pre-welded parts were" you mean you might have unknown fitup gap, I don't know how to help you there. The weld size needs to be increased by the amount of gap, but you have no way of checking this once the part is already welded. Sounds like you really need to set up a proper welding program including quality control and inspection at all the appropriate stages. Hire a welding engineer, or at least bring in a temporary consultant. If failure of this weld might endanger human safety, your company is acting irresponsibly by welding without really knowing what you're doing.
If you're concerned about the 0.125" vs. 0.06", oversize welds are generally not disallowed for structural reasons. They can be problematic if the welding melted through the base metal, especially with double-sided fillet welds in which the long shape of the combined nugget can lead to cracking during cooling. They can give a false sense of security if the base metal strength is less than that of the oversized weld. At least in D1.1, for materials thicker than your application, fillet welds in lap joints are required to be 1/16" smaller than the material thickness so that the the unmelted edge of the material can still be seen, becaus a melted edge might disguise an undersized fillet weld.
All in all, if someone gave you a 1/8" weld instead of a 1/16" weld, that in itself isn't a problem, but if you have an unknown fitup gap that might be reducing that 1/8" weld to something less than 1/16", you could be in trouble.
Hire a welding engineer.
Hg
Eng-Tips guidelines: FAQ731-376
RE: Weld bead callout on a print
The vendor that is welding these parts has done so for may years, and me being new to QC(for this company)I needed to do inspections that dealt with the launch of a new product which utilized exixting componants, but made with different materials, so a layout was in order.
I just may contact the vendor to see if they can shed some light on this subject for me.
Thanks
Mike