[MW:32805] Re: QW 200.4: Combination of Welding Procedures

"Question: While combining the two PQRs to weld a plate with the thickness(es) ranging from 1.5 mm to 16 mm."

pl, check one is semiautomatic and one is a manual process, I don't see benefits of the combination.?...

furthermore,

welding Root wirh SMAW and over it SAW OR welding Root with SAW over it SMAW does make welding complex.

On Wednesday, December 29, 2021 at 6:35:29 AM UTC+3 Sudhakar Kuppuswamy wrote:

Hi,

Currently one of my clients is having an ambiguity in applying the requirements of ASME Section 09 Clause QW 200.4: Combination of Welding Procedures, Subclause:  a & b requirements. Hence, support is required in finding an interpretation from ASME Section 09. (Interpretation in CS connect is not apparent for this clause)

Background: Two PQRs were qualified separately, PQR A is qualified with SAW process using 8 mm thickness plate and PQR B is qualified with SMAW process using 8 mm thickness plate.

Question: While combining the two PQRs to weld a plate with thickness(es) ranging from 1.5 mm to 16 mm.

Do as per QW 200.4, it is necessary to have the root pass process PQR need to be qualified on a minimum 13 mm thickness plate?

I'm pretty sure it is not required to have a root pass process PQR with minimum 13 mm thickness in the above case. However, it would be helpful if you found any interpretation on this.

Regards,

Sudhakar K CEng MWeldI,IWE.

Welding & Metallurgical Engineer,

Email: sudhak...@gmail.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/5773e14a-e4c7-4c2c-8138-cf9ea43dcc05n%40googlegroups.com.