thread338-264003: valves who meet NACE MR 0175

The proposal is not strictly correct.  ISO 15156 is not a certification document; it is a document of materials requirements and environmental limitations.  Since it is the end user's responsibility to have selected the correct materials based on their knowledge of the service environment, it is extremely difficult for a supplier to certify compliance when they do not know the service environment.  You, as a specifier, must indicate which tests and inspections are required and then define that the results of such tests and inspections be incorporated into the inspection documents.  Gone are the days of simply asking for 'NACE'.

Steve Jones
Materials & Corrosion Engineer

http://www.linkedin.com/pub/8/83b/b04
 

SJones,

Thanks for your comment. This NACE certification requirement is introduced due to possible H2S presence in the flare and fuel gas system of the burners in a hydrogen plant. Our engineering are specifying NACE compliance in equipment data sheets and the detailed specifications are indicating where necessary "execution according to NACE MR 0175" and that "NDT records shall be provided". The line which I was asking is only for the Quality Control Plan. Don't you think this is sufficient for the vendor to understand what we want?

Rgrds,
JT

The vendor probably understands what you want, but can they give it to you within the letter of ISO 15156?  Your engineers appear to have done the usual: simply asked for 'NACE compliance' without reading the details of the standard.  In summary, if the end user wants 'NACE compliance', the end user must clearly state what constitutes compliance.

Steve Jones
Materials & Corrosion Engineer

http://www.linkedin.com/pub/8/83b/b04
 

NACE MR 01-75 does not address QA/ QC. So you should have QA /QC proceedures that demonstrate "NACE" compliance ( eg. frequency, method, location ,etc of hardness tests).