RE: Flattening limits for pipes

From: <Dacharaju>
Date: Mon Jun 27 2005 - 23:48:00 EDT

2002 Edition (Revision of 1999) also indicates the same limits as below: "Flattening of a bend, the difference between the maximum and the minimum diameters at any cross section, shall not exceed 8% of nominal outside diameter for internal pressure and 3% for external pressure. Removal of metal shall not be used to achieve these requirements"

regards,
D.K.M.Rao.

Shamrose Chaudhry <schaudhry@descon.com.pk> Sent by: <a href="/group/PipingDesign/post?postID=V_TmfA4KngZv0DaanroBy3xmbry4VjQv5fdSH9Bm1O4F3o0mhKYetsA-nigY3Xokc1z_flQgLbacqF1lAyxhnT5b">PipingDesign@yahoogroups.com</a> 06/27/2005 07:43 AM
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Subject
RE: [PipingDesign] Flattening limits for pipes

Hi,

I found this in 1999 eddition, Hope it will help.

K332.2.1 Bend Flattening. The difference between the maximum and the minimum
diameters at any cross section of a bend shall not exceed 8% of nominal outside diameter for internal pressure and 3% for external pressure.

Regards,

Shamrose Ch.

-----Original Message-----
From: <a href="/group/PipingDesign/post?postID=V_TmfA4KngZv0DaanroBy3xmbry4VjQv5fdSH9Bm1O4F3o0mhKYetsA-nigY3Xokc1z_flQgLbacqF1lAyxhnT5b">PipingDesign@yahoogroups.com</a> [mailto:<a href="/group/PipingDesign/post?postID=V_TmfA4KngZv0DaanroBy3xmbry4VjQv5fdSH9Bm1O4F3o0mhKYetsA-nigY3Xokc1z_flQgLbacqF1lAyxhnT5b">PipingDesign@yahoogroups.com</a>] On
Behalf Of <a href="/group/PipingDesign/post?postID=uPyPLgNEZMCluahehPZ_HzM0d0A0LKpEoLS4zJN_U8g4-nqON27sHjt4DMzwyqG2ng8whLlBMXp_4kFXMWyxZ89AHw">CHAKRABORTYP2@iocl.co.in</a> Sent: Saturday, June 25, 2005 7:12 PM
To: <a href="/group/PipingDesign/post?postID=V_TmfA4KngZv0DaanroBy3xmbry4VjQv5fdSH9Bm1O4F3o0mhKYetsA-nigY3Xokc1z_flQgLbacqF1lAyxhnT5b">PipingDesign@yahoogroups.com</a> Subject: [PipingDesign] Flattening limits for pipes

Dear All,

Hi,

I am Chakra. I work in an refinery as an Inspection Engr where among many things I have to monitor the quality of fabrication as well (welding/SR & other related things)

I have an outdated edition of ANSI 31.3 (1993 ed) at hand & I have to tell the present tolerance for pipe flattening. Please tell me the tolerance specified in the present edition for ANSI 31.3 Clause K 322.2.1

Thanks in advance

Chakra

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[Non-text portions of this message have been removed] Received on Mon Jun 27 23:48:00 2005