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Re: [MW:23769] RE: 23760] PTC(Production Test Coupon) Requirements.

By Materials & Welding
Dear Mr. Goswami/all Experts.

Thanks for your valuable comments, regarding PTC(Production test coupon)/ Sample test coupon.

Our Manufacturing Design Code of Sphere ASME Section -Vlll Div-2, design temperature -34 deg centigrade. Materials are impacted tested at  -34 deg centigrade wıth simulated heat treatment Condition.
 Materials Details are,
Materials:-  SA537 Cl.1 ( P.No - 1 Group No-2)
Thickness:-  28 mm & 45mm
As per Section Vlll Div-2 Table No - 6.8 PWHT Shall be done materials thickness more than 38mm and above.
As per this clause our 28mm thick materials (shell) used sphere need not to be PWHT done.
Clause No-3.10.2.2 (provision of sample test coupons) calls for Sample test coupon only which under PWHT.
As per this clause we shall taken PTC only 45mm thickness used plate of sphere,  no need to do PTC for 28mm thickness used plate of sphere.
you are requested please advice in this regard.
 



On Wed, Oct 21, 2015 at 4:31 AM, pgoswami <pgoswami@quickclic.net> wrote:

Hi Mr Pinaki Boxi.

 

Production test coupons are mandatory as per ASME Sec- VII DIV-2. Please see the generic comparison of the ASME Sec –VIII codes in the following attachment (downloadable at the following web link).

 

The simulation test gives confidence about the materials , not after fabrication. Hence vessel test coupons are required.

 

Please look through following DIV-2 clauses with respect Test coupon requirements (with bullets as below).

 

Thanks..

 

 

Pradip Goswami, P.Eng,IWE

Welding & Metallurgical Engineering Specialist

Hamilton, Ontario, Canada

pgoswami@quickclic.net

pradip.goswami@gmail.com

ca.linkedin.com/pub/pradip-goswami/5/985/299

 

 

http://www.impactrm.com/glossary/ref/ASME_Section_VIII_Comparison.pdf

 

 

 

  • 3.10 MATERIAL TEST REQUIREMENTS
  • 3.10.1 GENERAL
  • 3.10.2 REQUIREMENTS FOR SAMPLE TEST COUPONS
  • 3.10.3 EXEMPTIONS FROM REQUIREMENT OF SAMPLE TEST COUPONS
  • 3.10.3.1 Standard Pressure Parts..
  • 3.10.4 PROCEDURE FOR OBTAINING TEST SPECIMENS AND COUPONS
  • 3.10.4.1 Plates.

 

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Pinaki Boxi
Sent: Tuesday, October 20, 2015 10:10 AM
To: Materials & Welding; Biplab Pal; chandan.majumdar
Subject: [MW:23760] PTC(Production Test Coupon) Requirements.

 

Dear Sir/Experts,

We are going to the manufacturing the Sphere for Liquid/unsaturated LPG.Design Code ASME Section -Vlll Div-2, design temperature -34 deg centigrade. Materials are impacted tested at  -34 deg centigrade wıth simulated heat treatment. Condition.

I have doubt regarding PTC. As per Section Vlll Div-1 if materials are under impact tested in that case PTC is mandatory. 

But as per ASME Section Vlll Div-2 it is required or not please advised me with supporting clause/documents.



--

Thanks & Regards
Pinaki Boxi.
*Manager QA/QC*
*ARP Project Site, Turkey*
*Mob :- +905351054384.

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Thanks & Regards
Pinaki Boxi.
*Manager QA/QC*
*ARP Project Site, Turkey*
*Mob :- +905351054384.

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