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Re: [MW:23862] WQT minimum requirement while using 2'' test coupen

By Materials & Welding
hi,
Minimum - 150mm.
Q W - 3 0 2 . 2 V o l u m e t r i c N D E . When the welder or
welding operator is qualified by volumetric NDE, as permitted in QW-304 for welders and QW-305 for welding
operators, the minimum length of coupon(s) to be examined shall be 6 in. (150 mm) and shall include the entire
weld circumference for pipe(s), except that for small diameter pipe, multiple coupons of the same diameter pipe
may be required, but the number need not exceed four
consecutively made test coupons. The examination technique and acceptance criteria shall be in accordance with
QW-191.

 
Thanks& Regards,
 
(Karthik)
QA/QC Manager 
CMI-Thai Services Co.,Ltd. 
50/35 Sermsuwan Road,Tambol Maptaphut 
Amphur Muang Rayong,Rayong 21150
Thailand
www.cmi-services.com 
Tel : +66 38 691 390-2 ext.103 
Fax : +66 38 682 338 
Mobile: +66 892512282 
E-mail : karthikeyan@cmi-services.com
               Karthik6684@yahoo.com



On Saturday, November 7, 2015 11:25 AM, MANIK <manik.tr2000@gmail.com> wrote:


Dear all

What is the requirements while using 2'' test coupon for WQT?
As i need to prepare 2 numbers of 2" test coupon for one welder.
I assume, it will be minimum circumferential length to be welded, if so how much?
Where shall i find the note in sec IX?

Manik
Piping Supervisor. 
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