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> pqr
tig
post Dec 8 2020, 10:19 AM
Joined: 10-Mar 11



Hi all
couple of questions if anyone can help

1.If a welder is qualified to weld p22 2cr-1/4 mol material, is he qualified to weld p11 1.25cr-0.5 mol material

2.some of our PQR are to to BS 4870 pt1 and the WPS to them are to bs EN ISO9606-1, we where told 9606 was better because it had a 3 year revalidation period but it does not cover us for fillet welds.

Is it possible to change the PQR,s to EN 15614-1 2017 because this testing standard includes fillet welds and what would it involve, would it be a paper exercise or would we have to do new procedures.

hope that makes sense

thanks in advance

tig
readywelderuk
post Jan 10 2021, 11:16 PM
Joined: 15-Oct 09



Think you are getting mixed up with PQRs Welder Quals and WPSs. You need to understand which you are looking at and what range of variables each qualifies and what your limitations are.
CChive68
post Feb 21 2021, 11:13 PM
Joined: 7-Apr 20



I am not a welding engineer but I'll have a punt at this.
1.If a welder is qualified to weld p22 2cr-1/4 mol material, is he qualified to weld p11 1.25cr-0.5 mol material
For PQRs,under ENISO15608 I think that 2%Cr/0.25%Mo is a group 5 or a group 5.2 dependent on %C and whether free of V or not. Under ENISO15608, 1.25%Cr/0.5Mo is a group 5.1? Based on this,I think that if you qualify the procedure on the 5.2,you are covered for all group 5 materials of a lower number?
For WQTs,the filler material is the essential variable for welder qualification,under ENISO9606,and both fall into FM3 so if the welder qualifies in 6g, for example, for FM3, the welder will be qualified for all positions for groove welds.


2.some of our PQR are to to BS 4870 pt1 and the WPS to them are to bs EN ISO9606-1, we where told 9606 was better because it had a 3 year revalidation period but it does not cover us for fillet welds.
Just get the welders to do a fillet test to your already qualified procedures?

Is it possible to change the PQR,s to EN 15614-1 2017 because this testing standard includes fillet welds and what would it involve, would it be a paper exercise or would we have to do new procedures.
Develop a fillet WPS from your already qualified butt procedure based on a few test single/multi-run fillets. Gather the as run data, test as applicable, VT/MT/Nick break/Macro/Hardness etc etc.

As I say, I'm not a engineer, so take professional advice before spending money.......
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