Re: [MW:17136] Which code states the distance between the weld .

Please refer 304.3.3 (Reinforcement for welded branch connection) of ASME B 31.3 ( on the assumption as your construction code)

Refer the definition of t=Pressure design thk of pipe. The thickness calculation for reinforcement pad is based on whether it is intersecting a longitudinal weld or not.

So as the code has given of both options (with intersecting and without intersecting), the welding is acceptable as per my opinion.

Normally the thickness of pad and welding details which is given in project standards will be on the assumption that the branch is not intersecting a longitudinal weld, If it does then the designer has to recalculate the reinforcement pad details.

As a good engineering practice, it should be avoided and it is the prime responsibility of Fabricator and site engineer to avoid this.

Please see further opinions from experts of this group before coming to a conclusion.

On Sun, Mar 17, 2013 at 2:59 PM, Anil Hegde <nottyanil@gmail.com> wrote:

Dear Expert ,

We have a 36 inch pipe which is welded type ,On it We have 12 inch connection which is coming on the ( long seam ) of the pipe .

Is There any code which says we can or cannot do welding on long seam of the pipe .

Requesting you for your positive feedback .

Regards

Anil Hegde 

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