I recall it is a Heat treatment issue, the 50mm is taken from the below paragraphs. i.e. twice the 25mm heat affected zone. I recall the distance should be 50mm or 5 times the wall thickness.
Refer to paragraph: 331.2.6 & 330.1.4, I cannot recall where I read the 5xT.
But anyway,if the welds are within that distance you need to consider heat treatment as the heat affected zones will have overlapped.
-----Original Message-----
From: mapte@technip-coflexip.com [mailto:mapte@technip-coflexip.com]
Sent: Wednesday, 2 October 2002 14:23
To: pipingdesign@yahoogroups.com
Subject: [PipingDesign] Weld to weld clearence.
Hi,
As a convention the toe to toe distance between two welds ( circumferential
or branch ) on a pipe should be 4 times the pipe wall thickness or 50 mm (
Some say 40 mm ) which ever is greater. Generally this is mentioned in the
project specifications.
The question is where in the piping standards is it written. I went through
B 31.3 but could not find any.
In section VIII , I found the mention but can that be generalised for
piping ?
-Mandar.
Texas Flange - a good source for information on industrial flanges, all they
ask is for referrals for designs they help with.
877-610-8924.
www.texasflange.com
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
"The information contained in this email and any files transmitted with
it are confidential and intended solely for the use of the individual
or entity to whom they are addressed. If you have received this email
in error please promptly notify the sender by reply email and then
delete the email and destroy any printed copy. Additionally, if you
have received this email in error, you must not disclose or use this
information in any way."
Alcan Engineering Pty Limited.
Phone: +61 7 3218 3555 Fax : +61 7 3236 0155 Email: info@alceng.com Web : http://www.alceng.comReceived on Wed Oct 02 18:55:00 2002
This archive was generated by hypermail 2.1.8 : Mon Oct 27 2008 - 20:23:58 EDT