dual pipe certificate

[AA karandish]

Dear experts,

 

As per our order vendor should supply seamless pipe to SA-333 Gr 6, but he supplied the pipe with dual material certificate of SA-106 Gr B/SA-333 Gr 6. please let us have your comment.

please note that our design code is ASME B31.3.

 

Regards,

Karandish

[elias jarjoura]

  Dear Karandish;
 ASTM spec for:  ASME SA-106 is a Standard Specification for Carbon Steel Pipe for High-Temperature Service
                         SA333-6  is a Standard Specification for Seamless and Welded Steel Pipe for Lower Temperature Service ( minimum impact value at -45degC is lower than what would have to be used to test SA106B.)
                          so u need to do charpy impacts wich should meet with certain minimum values of your design then u ll see if the material is compatibal with your system (if u gonna need the material for high or lower temperatures)  
                                        
                                                                                                                                                      regards
                                                                                                                                                Elias R Jarjoura


 

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Date: Wed, 9 Nov 2011 23:58:12 -0800
From: aa.kar...@yahoo.com
Subject: [MW:12919] dual pipe certificate
To: material...@googlegroups.com

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[Dindo]

Materials can be dual certified or even triple, as long as it meets all the criteria for what it is being certified for. SA-333-6 must have a Charpy for -50F / -46C.

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[Kristian Lund Jepsen (KUJ)]

There should be no problems – your material is in accordance with SA 333 Gr 6 (and other standards).

 

Often you will see the same if you order flanges in A105N or A350 LF2. It will be the same flange with a certificate covering both material standards.

 

It is also often we see on the same certificate compliance with certain DIN and EN standards. It is nice when material manufacturers can tailor pipes, flanges and fittings so they are in accordance with a number of standards.

 

regards

Kristian

[Fitria Rahman]

Hi Karandish, I was always thought that manufacturer only prepare 1 (one) certificate on material that you purchased. Double MTC may be issued for the same heat number, but not for each item that you purchased. If you have still doubt, you can obtain MTC validation from origin of manufacturer. I did this in several occasions and I got the answer.

Rgds

2011/11/10 elias jarjoura <elias-j...@hotmail.com>