Weld Flange on OD of pipe?? 1

[ssctsa1]

I need to weld a slip on flange about 18 inches from the end of a 6" schedule 40 pipe so that the flange can function as anchor. This is in a cryogenic ssytem. I have done the stress analyisis as far as the loads that I will get from pipe contraction. In my opinion, there should not be any issues with this. Should I be concerned about overheating and deformation due to the fact that I will have 2 fillet welds so close to each other. Teh heat load shouldn't be any different than the 2 fillet welds that a normal slip on flange would have. As a matter fo fact, I think that welding 18" from the end of the pipe would be better because ther is more of a heat sink.

Does anyone know if I would be violating any B31.3 requirments if I did this?

Thanks in advance

 

[BigInch]

S.O. probably isn't the best idea.

How about an anchor flange?

http://www.weldfit.com/eng/specialtyfittings/catengsec4pag3.html

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