D1.6 qualification 1

[Daveb1987]

Question 1: Since section 4.1.7 states "Qualification of WPS's for CJP groove welds in any position listed in 4.1.9 qualifies for all positions" I would think that flat or horizontal would qualify vertical BUT progression is an essential variable which requires requalification. So would this not contradict itself? Am I missing something?

Question 2: Does the qualification of any CJP groove weld geometry automatically qualify all other CJP groove welds? Example if I create a WPS for a square groove weld, does this also qualify flared bevel, single V, etc? Section 4.1.8 allows this for PJP welds but section 4.1.7 only says CJP qualification also qualifies all PJP, plug, slot and fillet welds. Also there is nothing mentioned in table 4.1 about joint geometry.

Any help would be appreciated.

Thanks,

Dave

 

[DVWE]

Great questions.

#1. Yes, this does contradict itself. This is pure speculation on my part, and I hate comparing codes, but I believe that clause was adopted from ASME Section IX. In Section IX, progression in the vertical position is a non-essential variable unless impact testing is required. See QW-405.2 and QW-405.3
This would be a great question for the AWS D1.6 code committee.

#2. In the ASME world, joint geometry is a non-essential variable. So qualification on a Vee Groove also qualifies you for every other type of Groove (square, double vee, etc.).
The way I see it, AWS could improve this code by also listing the non-essential variables similar to what ASME has done. I also believe that if a code is silent on a subject, it is considered non-essential.

Hope that helps!

 

[Daveb1987]

Thanks DVWE! Very helpful.