Longitudinal weld seams of adjoining sections (AWS D.1.1 Cl. 5.22.3)

[shafi1]

Gents,
Can someone spare their precious time in giving a solution to my below question please?

1. As per AWS D1.1 Cl. 5.22.3.1 Longitudinal weld seams of adjoining sections shall be staggered a minimum of 90°. We have a typical problem at site in which we have only 40-50°. How to resolve the issue?

2. Two 45° Elbows were welded together to get a 90° Elbow. The Elbows are 30" butt welded type as per B16.9. Now the existing welds on the 45° elbows are meeting at same location. There is no reference in B31.3 on this scenario. How to resolve? I am attaching a sketch also with this.

Thanks in advance.

 

[stanweld]

Why are you quoting from D1.1? If you are welding pipe to B31.3, what you are doing is acceptable.

 

[shafi1]

Thanks Stan, Well, the weld in question is between a jacket leg and transition piece.

This jacket is already piled in sea and a 3800 ton production station is now resting on that.

This one is designed in acc. to AWS D1.1. It is not a process piping to design in Acc. to B31.3

 

[MJCronin]

Shafi...

Since, after a long series of questions and answers, we find that your problem is a structural problem, not a process piping problem.....

I believe that you should post your question in one of the structural engineering forums, not the "piping & fluid mechanics forum"

-MJC

 

[stanweld]

You forgot to complete the requirement, "...unless closer spacing is agrred upon by the Owner and fabricator." You must obtain the Owner's permission.

 

[shafi1]

You are absolutely correct Stan. Well, we are still hunting for a solution to this.