[MW:32712] QW 200.4: Combination of Welding Procedures

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: sudhakarceng@gmail.com.

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