Dear Mr.Karthikeyan,
Please give me your opinion for the following.
Recently we have qualified one PQR with
SMAW – Root and HOT pass.
FCAW – Fill and Cap.
Base Metal thickness: 25.4mm / 10” Pipe Dia
Code : AWS D1.1,2010.
SAES-W-013.
Since SAES-W-013 Clause 5.4.2 is confirming that FCAW process shall not be used for Root and we have followed the same condition during the PQR qualification.
Our interpretations are as follows:
1. As per the AWS D1.1, Table 4.2 - If we use the plate thickness of 25mm over, qualification range will be 10mm to unlimited.
2. I have stated in the WPS that SMAW process is only for root and hot pass and FCAW for FILL &CAP.
3. Based on the SAES-W-013 and AWS Table 4.2, the QUALFICATION range for the WPS is 10mm to unlimited or 0.5 to 1.5 of base metal thickness.
4. For the combination of Welding Process ( SMAW+FCAW), The thickness limitations will not be applicable for each process since root and Hot Pass of SMAW is not for FILL & CAP
5. SMAW WELD METAL is backing for FCAW.
6. We always use the WPS as SMAW –ROOT /HOT Pass & FCAW – FILL&CAP.
Clarification required:
1. For the combination of welding process, the thickness limitation will not be for each process.
2. Base metal Qualification range will be considered for both the process. ( as below).
With Kind regards,
S.Elumalai.
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