Re: [MW:27867] minimum distance limitation between two weld joints

Nowadays most of requirements are applicable in ASME and ISO also.

THANKS & BEST REGARDS,

KG.PANDITHAN, BE, IWE,  AWS-CWI, CSWIP 3.1,

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

On Sat, May 19, 2018 at 10:59 PM, Castle73 <castillodp73@gmail.com> wrote:

Friends a warm greeting to the whole group.

I have seen different publications regarding the minimum distance between welds, in this forum regarding this debate.

Of all the comments, the one that I find most convincing is the one expressed by comrade Srirammadhan in March of 2012, which says that it must be 1.5 times the outside diameter of the pipe or 5 times the thickness of the base metal or pipe, the greater of both values.

Then the friend Veereswara Rao on April 17, 2018, asks if there is a norm of reference in this respect, in fact according to the response of the friend kannayeram gnanapandithan if there is reference to a norm that supports it (Ref BS EN 12952-5), what which I think is excellent, because it must be that way, because each criterion or rule must be backed by a rule in a certain code that is being used. In the debate that opened the friend Murat Aksoy in March 2012 I consulted for the code ASME B31.3 or EN.

Now, this same criterion quoted from the reference Ref BS EN 12952-5, can be used for ASME B31.3 ??? or can it even be used for ASME B31.8 ????

In our case we use as a criterion that the minimum distance between two welds is 1 time the outer diameter of the pipe or base metal or 12 times the thickness of the same, the greater of both values, this as best practice, but the weakness of this criterion is that it lacks support, that is, it has the weakness that it does not have or at least does not achieve an endorsement in a Standard, either in ASME Code B31.3 or B31.8.

It is for this reason that I consider Comrade Srirammadhan's comment to be strong because it has a basis and support. I also respect all the comments of the participants of this debate in the forum. But like the criterion that I stated, any criterion without endorsement of reference to norm becomes only a best practice.

I apologize if I do not know that the rest of the comments on the subject also have reference to some standard as a backup in a certain code that is being used.

Please comment and also clarify what criteria can be used for ASME B31.8.

regards
Castle

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