Re: [MW:31987] Accuracy of PMI

Dear expert, 

Truly appreciate all the comments and advise.

It really helps me to understand better on the testing method, chemical analysis and how I can explain to client. 

Indeed it's client additional requirement which I feel it's not necessary because supplier has been supplying the same batch to other NACE project as well and there is no such issue at their site. 

Thank you so much experts. 

Best regards, 

Pravin Poornachandran 

On Fri, 5 Feb 2021 at 11:06, Vinay Thattey <vinay.thattey@gmail.com> wrote:

depends on type of equipment , accuracy , calibration done . my practical experience is ... 2 to 3 % variation is possible in PMI 

On Wed, 3 Feb 2021 at 09:17, Pravin Poornachandran <htcispravin@gmail.com> wrote:

Dear expert, 

Good day. 

Recently I performed WPS for ER70S-G for nace requirement project. 

Based on welding consumable mill certificate as per EN10204 3.1, Ni <1% and these chemical analysis is conducted in authorised laboratory following the method specified in industrial code. It is laborious procedure and accurate. 

But when we perform PMI, Ni values shows 1.2-1.5, which client is questioning now. 

I did contacted consumable supplier and they are very certain Ni is less than 1%. 

Can anyone advice how should I handle this situation. 

Best regards,

Pravin Poornachandran 

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