RE: Stress Reliving

From: <Chakraborty>
Date: Tue Feb 26 2008 - 04:42:00 EST

Dear Bhat,

For sour services, PWHT is mandatory for CS, irrespective of thickness. This is a service requirement. PWHT is also required similarly for Amine, caustic (above certain %age conc.) etc.

Regards

Chakra
-----Original Message-----
From: sudhindra bhat [mailto:sudhin_99@yahoo.com] Sent: Tuesday, February 26, 2008 2:57 PM To: <a href="/group/PipingDesign/post?postID=GVh-0PTpu4MP7BKmywXNsDtHKS-zeLIJ9aYLCnU6-SrsgZkNqOIf_TDSNp6Cx9tbyu_Cr4B2ECvoqvBFi6mvbRD-esunDig">PipingDesign@yahoogroups.com</a> Subject: Re: [PipingDesign] Stress Reliving

Dear Sabir,

Check the P- No with respect to your pipe material, which is mentioned in Appendix A1 of ASME B 31.1
With respect to the P-No refer section 131 for Welding Preheat & Section 132 for Post Weld Heat Treatment.
For A 106 Gr B , P-No is 1 ( as per 31.1) & since the pipe thickness is less than 19 mm both post weld & preheat are not required ( assuming ambient temp as minimum 21 Deg C)

With Warm Regards,
S P Bhat

sabirap < sabirap@yahoo. <mailto:sabirap%40yahoo.com> com> wrote: Gents

How to find out whether PWHT and stress reliving is required for a line.

The Pipe spec is
6'', BE, SCH XS, SMLS, A106 GR. B SOUR SERVICE Thank you,

Regards,

Sabir

---

Never miss a thing. Make Yahoo your homepage.

[Non-text portions of this message have been removed]

This Message was sent from Indian Oil Messaging Gateway. The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments.

[Non-text portions of this message have been removed]
Received on Tue Feb 26 04:42:00 2008