Re: Re: [MW:7962] No of Welders

Dear Mr. Das,
First of all, my appologies for refering a wrong para of API1104. Read 6.1 for 621.
I don't think it mandatory to have 2 welders on pipes above 12", I couldn't find any thing to support this requirement in API 1104. Whereas in Section IX it is allowed to qualify more than one welder on a single test coupon. Refer QW-306.
It is not mandatory to use two welders in pipes larger than 12" in Section IX also.

Regards,
Dr. Paulose John
QA/QC Manager
Unisis Engineering
KSA

On Sun, 31 Oct 2010 08:08:06 +0530 Arun Das wrote
>

Dear Dr.John,

As a custom for above 12" pipe we will be using 2 welders for the welding process. It is so done because of heat input and distribution factors I beleive, but my question was that do this is stated as mandatory in any of the codes or standards.

I am having 1104 20 th edition of November 2005 with me. API 1104:2007. is the modifications??

Thanks and regards,
>

Arun S Das

From: Dr. Paulose John <drpaulosejohn@rediffmail.com>
>To: materials-welding <materials-welding@googlegroups.com>
>Sent: Sat, 30 October, 2010 4:07:56 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 qualificationupon 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

To: materials-welding@googlegroups.com

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

Thanksinadvance

with regards,
>

Arun S Das

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