If the mill supplying a seamless pipe is pre-qualified to supply NACE pipes,you need not carry out SSC test.Mill shall indicate NACE conformance on their TC including Hardness values.Everything depends on the customer's requirements.Many a times it is seen that Gas/liquid is not 'sour' with partial pressure of H2S so low that NACE does not apply but still customer insists for NACE conformance.As I have indicated in my previous mail,if your customer permits you,you can carry out SSC test on a pipe as per TM0177 standard and conform Nace compliance through lab test reports including hardness.You can go one step further and get micro test done as per ASTM E-45 method D and confirm absence of 'elongated MnS inclusions'.If the mill confirms NACR compliance,you do not have to carry out any other tests unless your customer has asked you additional specific tests.
Regards
Aarpee
On Sat, Sep 25, 2010 at 6:03 PM, Sivashankar Nagamanickamsundaramoorthy <poovaishankar@yahoo.com> wrote:
Hi Mr.Aarpee,Wheather SSC test is required for the Seamless pipes for the confirmation to the NACE requirements ?.RegardsSiva
From: Ramprasad Chari <ramprasad.chari@gmail.com>
To: materials-welding@googlegroups.com
Sent: Thu, September 23, 2010 1:48:58 PM
Subject: 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.RegardsAarpeeOn 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
______________________________________________________
CONFIDENTIALITY NOTICE: This electronic mail transmission may contain information that is confidential, privileged, proprietary, or otherwise legally exempt from disclosure and is intended only for the use of the recipient named above. We do not waive confidentiality in the event this mail was transmitted wrongly. If you have received this communication in error, and are not the intended recipient, you are hereby notified that you are prohibited from reading, printing, copying, or disseminating this message, any part of it, or any of the attachments it may carry. If you have received this message in error, please destroy all electronic and paper copies and notify the sender immediately of the inadvertent transmission. We would like to advise you that we would not waive any of our privilege for taking action against you in the event the confidentiality of this message has been compromised. Thank you for your cooperation
________________
This email has been scanned by the MessageLabs Email Security System.
For more information please visit http://www.messagelabs.com/email
______________________________________________________________________
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
No comments:
Post a Comment