[MW:1690] Re: Longitudal seam spacing as per B 31.3

Carlos Oliveros

   Insp. Sold

Dear Friend,

4.3.2 Buttwelds
4.3.2.1 If seam-welded pipes are joined by butt welding, longitudinal weld
seams should be positioned at least 25 mm (1 in) or 30 degrees apart.
PIP PNSC0001  COMPLETE REVISION
ASME B31.3 Metallic Piping  October 2006
Fabrication and Examination

 

On dom 01/03/09 12:49 , Mukesh Kumar vijmukesh@gmail.com sent:

Dear All,

 

At one of our project, we are facing the problem of longitudnal seam to seam spacing less than 1" . In some of the cases, these are unavoidable instances like pipe to elbow at erection site.but I couldn't find any reference about it in B31.3.

 

Please advice what should be the course of action in this case.

 

Is the additional NDT and stress releiving can be done to avoid any changes in metallurgy?

 

Regards

Mukesh

LURGI

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