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Re: Re: [MW:7963] No of Welders

By Materials & Welding

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 or


Contractor 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-------

 



Date: 10/30/2010 7:57:30 PM


Subject: Re: Re: [MW:7943] No of Welders

 
Dear Mr. Arun,

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








To my knowledge there is no limit for number of welder qualification  upon one WPS, You can qualify as many as per to the requirement for your project. 

 


 

 



Here By,

 

P.BalajiRajan,


-------Original Message-------

 


From: Arun Das

Date: 10/28/10 17:39:52


Subject: [MW:7911] No of Welders

 



Sir,

 

Minimum number of welders to be qualified upon one WPS is mentioned in SEC 1X or API 1104.

We are using PIPE,16"X0.375"WT STD SCH API 5L X52

 

Thanks in advance

 

with regards,
 


Arun S Das



 

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