IMO, mainly backing rings shall be of weldable quality and sulfur content < 0.05% maximum.
Below is the extraction of ASME B31.3 - 2010
Hope, I understood your question properly and the above answer is up to your expectation.
Respectfully,
Nandesh Kumar A
--- On Sun, 11/11/12, Biplab Pal <biplab.mech@googlemail.com> wrote:
From: Biplab Pal <biplab.mech@googlemail.com>
Subject: [MW:15904] Backing strip/ring material acceptance.
To: "materials-welding" <materials-welding@googlegroups.com>, "JALADHAR JENA" <jdjena2006@yahoo.co.in>, "Pinaki Boxi" <boxi.pinaki@gmail.com>, "chandan.majumdar" <chandan.majumdar@sgs.com>, "daval shaikh" <davalshaikh@gmail.com>
Date: Sunday, 11 November, 2012, 4:52 AM
Dear Experts, Our contractor is going to use the backing strip(permanent) for pipe welding. As per ASME B 31.3 the material will be acceptable if Sulpher content remains less than 0.05%. Can anybody give a light on backing strip/ring material acceptance for piping. Please provide me the references.
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Thanks & Regards
Biplab Pal
Welding Inspector E-mail: biplab.mech@gmail.com Information in this email and any attachments is confidential and intended solely for the use of the individual(s) to whom it is addressed or otherwise directed. Please note that any views or opinions presented in this email are solely those of the author and do not necessarily represent those of the Company. Finally, the recipient should check this email and any attachments for the presence of viruses. Myself accepts no liability for any damage caused by any virus transmitted by this 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/ http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm 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.
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