Distance of Reinforcing Pad Weld to Channel Flange Weld - ASME VIII-1 8

[FPPE]

Hi,

I checked ASME VII-1 (UW 14) but I didn't understand if it's applicable to the case shown in the attached image. Is there a prescription in the code for the minimum distance between the weld of re-pad to the circumferential weld of the flange?
I did a research on site on this topic but in every post were mentioned the opening and this confused me.

Thank you in advance for your help.

 

[IdanPV]

Hi,
Maybe this will help:

https://www.eng-tips.com/viewthread.cfm?qid=473197

I hope this is of assistance.

 

[Cobra17]

As long as the limit of reinforcement does not go past the circ. seam and in to the flange, and the repad weld does not overlap the circ seam it's fine.

 

[Christine74]

Section VIII Div. 1 allows you to place the repad directly over the weld seam (see UG-82). In fact if you want you could even put the nozzle opening directly on the weld seam (see UW-14(a)).

What's permitted by the Code and what's considered good engineering practice are often very different things.


-Christine

 

[FPPE]

Thank you all for the help!

 

[r6155]

You must take into account the difficulty of welding in small distances and the possible repairs.
Also consider stud mounting and channel flange tightening during in-service inspections

Regards

 

[FPPE]

Thank you r6155!

 

[Krausen]

A good rule of thumb is 2” clearance from edge of weld to edge of weld. Although VIII-1 will not require this, as stated above. It looks like you may be dealing with an S&T exchanger. If so, API660 states this exact recommendation in their Appendix A, under Fabrication

 

[hacksaw]

Don't forget you'll have to allow for tool access should the main run flange need to be unbolted.

 

[FPPE]

Thank you very much Krausen and hacksaw!

 

[SnTMan]

If you placing two groove welds close together don't forget to account for the bevels

Regards

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[FPPE]

True, thank you Mike!