Thursday, September 23, 2010

Re: [MW:7171] NACE MR0175

Conformance to NACE MR0175 certifies material to be used for 'sour' gas applications which implies that material is resistant to various cracking mechanisms assoiated with H2S presence in a wet gas/liquid.If the mill is pre-qualified carrying out tests as per TM0177 standard(for SSC) and TM0284(for HIC) then mill can certify conformance.Alternatively,if the client permits you can carry out the test per heat per size to confirm conformance to NACE MR0175.For seamless pipe HIC may not be required but for welded pipe,you may have to carry out HIC as well as SSC test.Hardness is one of the criterion of max 22HRC.If hardness is not achieved in 'as 'condition in weld and HAZ,you may have to carry out PWHT to ensure that hardness is below 22 HRC.
Regards
Aarpee

On Thu, Sep 23, 2010 at 10:53 AM, Moin - QC <Syed.Moin@gerabgroup.com> wrote:

Hi,

Can somebody please explain the difference between '' Material According to NACE MR0175'' & '' Hardness according NACE MR0175''

I am purchasing some material from mill, but they said that they can meet the hardness requirement only, but cannot write '' Material accordance to NACE MR0175'' on material test certificate.

Material is seamless and welded pipe.

Thanks & Regards
SM


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