Dear Friends,
Here question is no of welders could be qualified using a single coupon ,For qualficiation of welder min 12 " weld length is required to validate a welder performance by radiography or four bend test at required positions as per code and accordingly we can qualify no of welders per coupon .For 16" pipe line coupon two welders may be qualified in order to maintain welding sequence of pipeline welding .
Best Regards,
Francis Lobo
---- Original Message -----
From: (PBR)P.BalajiRajan
To: materials-welding@googlegroups.com
Sent: Sun, 31 Oct 2010 00:40:03 +0530 (IST)
Subject: Re: Re: [MW:7960] No of Welders
Dear Dr.Paulose John, As per your statement in SEC IX QW 301.2 and API 1104 para 6.2.1 it has been not mentioned regarding the minimum number of welder to be qualified by one WPS QW-301.2 Qualification Tests. Each manufacturer orContractor shall qualify each welder or welding operator For each welding process to be used in production welding. The performance qualification test shall be welded in accordance With qualified Welding Procedure Specifications (WPS), 6.2.1 General (API 1104) For single qualification, a welder shall make a test weld Using a qualified procedure to join pipe nipples or segments Of pipe nipples. The welder shall make a butt weld in either The rolled or the fixed position. When the welder is qualifying In the fixed position, the axis of the pipe shall be in the horizontal Plane, in the vertical plane, or inclined from the horizontal Plane at an angle of not more than 45°. A welder making a single-qualification test for branch connections, Fillet welds, or other similar configurations shall follow The specific procedure specification. Sir please clarify. Here By, P.BalajiRajan, Inspection Engineer, Velosi Certification LLC, P.O 3408 Doha-Qatar. -------Original Message------- Minimum number of welders to be qualified by one WPS is - One welder. The welder who performs the PQR coupen welding is automatically becomes qualified. Please refer 2nd para of QW 301.2 of Section IX:2010 and para 621 of API 1104:2007. Regards, Dr. Paulose John QA/QC Manager, Unisis Engineering, Saudi Arabia . On Sat, 30 Oct 2010 14:15:07 , No ID Specified wrote
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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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