Query regarding valve material with dual certification

[Gurunath Hanamar]

Dear Experts,

Dear All,

We are having valve with body material requirement as A351 CF8M but we have got a body which is dual certified for A351 CF3M as well as CF8M & it is embossed on the body as A351 CF3M / CF8M.

Problem here is TPI is telling us client requirement is A351 CF8M only, so body should  be embossed with only A351 CF8M so grind CF3M embossing on the body of all the valves. 

Kindly please help me with code reference's if available regarding dual certification & acceptable clause. Else please give more information(picture) regarding dual certification & how it came into practice.

Thanks in advance for your valuable time.

ವಂದನೆಗಳೊಂದಿಗೆ / Best regards, 

Gurunath Hanamar

[Nachhattar Singh]

Dear Gurunath

 

You can grind the letters not required,

BUT – what about the certificates which are already having dual certifications. No one will accept as this is a pure falsification of the documents.

Choice is yours,  but you can always refer the case to the client and seek the clarifications.

If  being accepted then well and good otherwise ask the vendor to comply with yor PO specifications which supersede everything.

 

Nachhattar Singh

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[John Henning]

Carbon content is low enough to be below the maximum carbon of CF-3M but tensile properties are high enough to meet the minimum requirements of CF-8M.  Therefore it can be dual certified.

 

Wrought corollary is 316L and 316.  This is common practice and you will especially see it for 304 and 304L.

 

John A. Henning

Welding & Materials

 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Gurunath Hanamar
Sent: Wednesday, September 18, 2013 7:03 AM
To: material...@googlegroups.com
Subject: [MW:18696] Query regarding valve material with dual certification

 

Dear Experts,

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[navanee kumar]

Dear Expert,

 

Dual certificates always acceptable only. Example pipes have A106 Gr B,API 5l Gr b, A 53 gr b

 

But what is our requirement as per specification, that requirement  has to complied. If it is complied particular spec then how we can reject and what basis can reject?

 

 

 

 

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Thanks&Regards,
Navaneethakumar.D.
+971508938041

[Manivannan Hemu]

Dear Gurunath,

You have not mentioned to which standard/code that the valve is manufactured, however  para 2.6 of ASME B 16.34 permits the multiple grades marking of more than one specification or more than one grade of a specification provided conditions satisfying  the requirements of para 4.2.8, and 5.2.2 together with the pressure – temperature rating requirements of the grades are fulfilled. You can refer to this.

Regards,

MANIVANNAN.

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[george....@gr.bureauveritas.com]

Dual certification is a common practice.
In no case alter the original stamping

best regards

Dr. Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor
API 510 Inspector
Prelude FLNG ASME Subject Matter Expert

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[aa bb]

Dear all,

i think this is common understanding between u and client. u can directly contact client and i am sure they will accept because no technical issue at all. even grinding will be completely nonsense.

regards,

sam