Weld Symbol Question

By TexDon1 Date 04-10-2009 14:56

I have came across a CJP symbol that has just CJP in tail, a V on the ref. line and no dimensions, the shop has put a full pen weld at joint and then layed a fillet on the top of face. The question is does the shop need to lay a fillet weld down, when symbol don't call for it ?
I say no, but shop forman said it has always been done this way. ( Which don't mean correct ! )
Is there a ref in a code to this type of CJP symbol ?
If a fillet is needed, how is size known ?

By OBEWAN

Date 04-10-2009 15:18

CJP means complete joint penetration. There is a variation of the weld symbol you describe that would be able to specify a fillet weld on top of the v groove I think. That does not mean the method in your shop is wrong, but the documentation might need to be revised if you are worried about audit situations.

By hogan

Date 04-10-2009 15:24

TexDon1,
It depends on the joint type. Look at AWS D1.1 2.6.5 (06). If it is a T or corner than you may use a fillet to reduce stress concentrations. Hope this is what your after.

By swnorris (****)

Date 04-13-2009 13:31

TexDon1,

Does the shop need to lay a fillet weld down, when symbol don't call for it ? Not unless it's shown on the design drawing. (If your company is responsible for desining the connections, you may want to research further).... along the lines of what hogan has mentioned.

If a fillet is needed, how is size known ? The size will be determined by the Engineer of Record and it should be shown on the design drawing.

Basically, if the joint requires more than one type of weld, a symbol shall be used to specify each weld.

By 803056

Date 04-15-2009 12:10

The fillet weld in the corner of a T- or corner joint is called a reinforcing fillet weld. In the case of D1.1, where the connection is subject to cyclic stresses, the reinforcing fillet is required and it "should" be specified and it "should" include a fillet size. In the case of a static load the designer can specify a reinforcing fillet and "should" include the required weld size. If the welder puts a reinforcing fillet weld in the the corner and it isn't specified, if doesn't reduce the load carrying capability of the welded joint and there is no reason to reject it unless it interferes with a mating part.

Best regards - Al