spacing requirments for the additon of a nozzel to a pressure vessel 1

[COrino]

We are designing a pressure vessel that we need to add a nozzle to. The question is what are the requirements that dictate how close a feature (the nozzle) can be with respect to an adjacent welded joint? What part of section VIII would be most applicable in determining this spacing?

 

[SnTMan]

Which Division?

 

[COrino]

Division 1

 

[SnTMan]

COrino, kind of depends on the opening and welded joint. Openings may be placed in a welded seam, see UW-14.

Opening limits of reinforcement may contain a welded joint, see UG-37, definition E1.

Opening limits of reinforcement may not contain bolt flange material, see UG-40(e).

If your work is governed by other parts, such as UHA, UNF, UHX, etc. you should consult thise parts as well.

Now, as a practical matter it is good practice to separate welds by 1 to 2 inch toe-to-toe for inspection purposes.

Regards,

Mike

 

[LCeballos]

Totally, I am in agreement with SnTMan, you are to be in compliance with paragraph UW-14.

Regards,

Luis.

 

[COrino]

Thanks for the information. Its very much appreciated.