How close by code can two welds be made to each other?

[bizsheets]

Sorry folks, new to the forum and I believe I posted my question in the wrong area. Looking for feedback on the following thread (posted to the Welding, Bonding & Fastener engineering forum):

How close by code can two welds be made to each other?
thread725-276115

 

[pennpiper]

As we have said many, many times on many, many different Piping Forums this issue is NOT covered by any of the ASME Piping Codes.

 

[bizsheets]

pennpiper, that may have addressed my 2nd question, but I am also looking for any relevant code or standard that does address this issue. Additionally, I was looking for feedback on questions #1 and #3.

Those questions are again:

• What, if any, is the relevance to ASME B31.1 of Section VIII Part UW Reqs for Pressure Vessels Fabricated by Welding, Series UW-9, Design of welded joints, paragraph (d))?
o If a pipe was constructed to B31.1, does the boiler code VIII apply in any way to this situation?


• What relevance does NDT have to assuring that the proximity of the welds is satisfactory?
o Can NDT provide assurance that a design meets code?

 

[Mr168]

In response to your original array of questions:

-None outside of recommended practices.
-No

-None
-Not specified for B31.1

-None
-That's the entire purpose of NDE, albeit not in regards to proximity of two welds.


Long story short, B31.1 is not going to specify a minimum distance for two welds unless it refers to the minimum distance between adjacent openings (see interpretation B31.1-22-7). B31.3 won't either, with the exception of addressing overlapping reinforcement.

 

[SJones]

The little Google search box at the top of the page works wonders:

http://www.eng-tips.com/gsearch.cfm...0&ie=ISO-8859-1&q=weld+spacing&sa=Go&siteurl=

http://www.eng-tips.com/viewthread.cfm?qid=276120&page=1#0

Steve Jones
Materials & Corrosion Engineer

http://www.oilandgaspeople.com/cv/11499664

http://www.linkedin.com/pub/8/83b/b04