WPS joint design 1

[Motivated Apprentice]

If I have two UPN200 to be welded, like in the photo,
Is it possible to use the weld all-around symbol without seperating each welding joint, can I take the part directly from the drawing, and use two UPN200 in design directly, In WPS according to ASME IX.

Is the joint in other photo, a butt joint or a corner joint?

Thanks

 

[r6155]

Try fillet weld.
Regards

 

[MintJulep]

You can't use all-around here because it would be ambiguous.

 

[gtaw]

Sorry, but I'm not sure I understand the question. I have no idea what UPN200 means. Is that a type of base metal? It doesn't appear to specify a shapp because it appears to relate to a structural angle and a structural channel. Are you asking as a designer or as a welder?

As a designer, I would think you would have to know the forces/loads to be transferred from one member to another and then decide what weld type would do the job, i.e., fillet on one side or a groove weld on one side or both sides? Whether a complete joint penetration groove weld is required or whether a partial joint penetration weld is sufficient? If a PJP groove weld is sufficient, what weld size is needed?

As a welder, it isn't your responsibility to design the weld. It is your job to follow the drawing and deposit the welds specified by the drawing.

Best regards - Al

 

[r6155]

UPN = C Channel

 

[gtaw]

Thanks for the clarification.

Best regards - Al

 

[DekDee]

General engineering practice is fillet weld on the internal flanges and web.
Fillet weld on the external web.
PJP or CJP (based on loading) on external flanges.

 

[Motivated Apprentice]

THANK YOU all for your help.
It is actually a galva structure(a cabin) used for transporting a 1200L storange tank. About the loads, the mechanical engineer got that covered. It only needs PJP double V fillet welds according to the engineer.

My work is to design and write the preliminary WPS. It is always revised carefully and directed by a mechanical engineer (my boss and mentor at the company) and an IWE (my mentor at the training center).
However, these two have great work loads. And I can't ask them about every detail.

And I thank god that I have this free platform to learn (which is my ultimate goal) where knowledgeable experts share their thoughts. I know that I am under-qualified, but how would I learn if I don't ask questions. (we don't have online courses and I get welding documents through my personal efforts...).