WQT minimum requirement while using 2'' test coupen

[MANIK]

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. 

[Karthik]

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 : karth...@cmi-services.com

               Karth...@yahoo.com

--
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-weld...@googlegroups.com.
To post to this group, send email to material...@googlegroups.com.
Visit this group at http://groups.google.com/group/materials-welding.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/202ec153-896e-4bb3-a56c-f998e04eb6f3%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[James Cyrilandrew]

No need one test coupon is enough .......
2" is 60.3  multiply by 3.1425 is 189.49mm

--