weldment dimensional tolerances
weldment dimensional tolerances
(OP)
We have a few internal "standards" for dimensions we expect when a component is fabricated by welding. It dates back to the days when we had our own fabrication shops.
Is there a modern day guideline of accuracy that can realistically be expected when multiple components are welded, then welded together?
An example might be two or three 1/2 inch thick rolled rings and partial cones, 6 to 10 feet in diameter and several feet long, stacked together and welded to a 1 inch thick top plate.
Like a hopper or cyclone.
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Is there a modern day guideline of accuracy that can realistically be expected when multiple components are welded, then welded together?
An example might be two or three 1/2 inch thick rolled rings and partial cones, 6 to 10 feet in diameter and several feet long, stacked together and welded to a 1 inch thick top plate.
Like a hopper or cyclone.
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RE: weldment dimensional tolerances
I am way behind the times with this also but we are starting to use more laser cutting of pieces and do the insert tab A into slot B type assembly so that things are placed pretty well when it is assembled.
I find that Vendors want your business and are always willing to share what they are capable of with you if you discuss it with them.
RE: weldment dimensional tolerances
Dennis Moss's PV handbook is available online to ASME members. Megyssy's (sp?) PV handbook should also. Any thing related to process towers etc. should be applicable.
Probably on something like you describe +/- 1/2 OAL and +/- 1/4 to interface features such as connections, supports, etc. would be in the ball park.
Regards,
Mike
RE: weldment dimensional tolerances
In fact what you have may be more than most folks. You could perhaps update it for the improved accuracy of the part cutting material, if any.
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