[MW:3648] RE: 3639] Re: Criteria of HIC testing CSR, CTR and CLR ratio.

 

November 13, 2009

 

Please use NACE TM0284:2003. Thanks.

Pablo

SAVE TREES  - THINK BEFORE YOU PRINT

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From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ramprasad Chari
Sent: Thursday, November 12, 2009 7:31 AM
To: materials-welding@googlegroups.com
Subject: [MW:3639] Re: Criteria of HIC testing CSR, CTR and CLR ratio.

 

In my opinion,client needs to specify "crack resistance service" desired by them.Like SOHIC & SZC are to be done for some severe conditions especially applicable for Plates.HIC resistance is more critical and calls for a controlled chemistry of elements especially Sulphur level.Severity is decoded by partial pressure of H2S and its mole fraction.Again as per my understanding "generalized" compliance to NACE std may not be correct.

If you refer page 41(Annexe E) of the std,it calls for confirmation by Material Purchase i.e.Customer.

Hope I have made myself clear.

Regards

Aarpee

On Thu, Nov 12, 2009 at 8:23 AM, Bagesh Kumar <bagesh.kmr@gmail.com> wrote:

Dear All,

         I have gone through the Nace MR 0175/ISO 15156, the HIC and SCC has to be carried out on the materials according to the standard.

Now I have gone through a project specification in which the client has specified clearly the requirement of HIC Testing, SSC testing on Pipes, Fittings, and Valves separately apart from the above stated standard requirement.

Another Project specification of different client do not specify these testing separately but they desire the materials to be according to NACE MR 0175/15156,

My question remains: Is HIC and SSC testing mandatory on all piping components for SOUR Services? if yes then please get me the code reference for it.

And also illustrate the CSR (Crack sensitive ratio) other two results like CLR and CSR.

The discussion on the chapter shall be appreciated.

Thanking You.

Bagesh.

 

 

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