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ajn22anellie (Mechanical) (OP)
30 Sep 08 15:59
There is some confusion at my office as to the definition of the all around weld symbol.  I have not been able to find a satisfactory answer online.  Here is the question....

When two plates (one much smaller than the other )are welded together such that the large flat areas of the plates are in contact and the smaller plate overhangs the larger one, does the all around symbol imply that weld is wrapped around the smaller plate on the back side?  See picture for illustration.  

If one looks at the attached picture and please excuse the powerpoint drafting....does the all around weld symbol imply that the dashed line is welded?  

thanks in advance
MadMango (Mechanical)
30 Sep 08 16:09
That's how I interpret the all around symbol, meaning to weld all sides of the joint (even a lap joint).

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ewh (Aerospace)
30 Sep 08 17:33
I agree with MM.  It is an "all" around symbol, not a partially around symbol.  If it were a partially around weld, you would not use that symbol.  

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aardvarkdw (Mechanical)
30 Sep 08 17:55
In the case shown in your print, I would say yes it means all 4 sides. However if the vertical edges of the two plates were coplanar, it would not mean all 4 sides because one side would need to be a seam weld and not a fillet.  


TheTick (Mechanical)
1 Oct 08 12:56
It may be technically correct but I would not use it in this situation, because it is easily misinterpreted.  Take the extra 8.4 seconds to add additional weld symbols for clarity.

I prefer to restrict all-around to joints like tubes butting onto plates, where the meaning is clear.
ewh (Aerospace)
1 Oct 08 13:39
Good point, Tick.  It is never a good idea to introduce ambiguity to a drawing.  If in doubt, spell it out.

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danielthb (Electrical)
10 Oct 08 12:14
Agree with eliminating ambiguity.  So, maybe turn the fillet symbol around...?:)

ctopher (Mechanical)
10 Oct 08 12:56
This can be interpreted by different welders. To make it clear, possibly add the weld symbol to all 3 edges and not use 'all around'. If you want the underside welded, show a bottom view with another weld symbol. They both may be two different setups anyway.

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CheckerRon (Mechanical)
13 Oct 08 13:00
Agree that this means weld all around including the reverse side but it could be misinterpreted. Also as Dan says, your fillet weld symbol is backwards.
The symbol is always the same, regardless of what side the arrow is on.

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