I would avoid going below Glenn's bench mark and if I recall you should not
have a straight spool length between welds of less than 5 times the
thickness of the pipe. A mail from Ralph from a few weeks back which I
though was very interesting
"A pipe is not a pipe, unless the its length is much larger than the
diameter (and the diameter in turn much larger than the thickness). If the
length is only slightly larger, it is a 55 gal. drum; if the diameter is
very
much larger than the length, then it is an above ground swimming pool.
-----Original Message-----
From: Glenn Dillon [mailto:glenn.dillon@task-consultancy.co.nz]
Sent: Friday, 22 March 2002 15:23
To: <a href="/group/PipingDesign/post?postID=bFpU6zeHbCyUpuouorx8BPV-E0ah6Ud-sFBchA0gKvMyQlPrm43y2-KgZ33WsfWdIyqSD7hV6ewYAXA9NnMgqRb9qdg">PipingDesign@yahoogroups.com</a>
Subject: RE: [PipingDesign] Minimum distance between Fittings
Hitesh, assume these are butt weld fittings. Fitting to fitting is preferred but where not possible I work on minimum pup spool distance of 50 mm to allow for weld effected zone and weld efficiency. Haven't had any failures yet. With steam, elbows can be highly stressed and its best to ovoid short pipe sections and layout distribution to allow fitting to fitting.
Hope these comments of some help. Best regards Glenn
-----Original Message-----
From: Ashok Dani [mailto:ashokdani@tatachem.tata.com]
Sent: Friday, March 22, 2002 4:29 PM
To: 'pipingdesign@yahoogroups.com'
Subject: [PipingDesign] Minimum distance between Fittings
Importance: High
> What is the minimum distance required between Bend-Tee or Tee-Tee for
> Steam
> line or as per B31.1?
> Thanks in advance
> Hitesh
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A L C E N G
Alcan Engineering Pty Limited.
Phone: +61 7 3218 3555 Fax : +61 7 3236 0155 Email: <a href="/group/PipingDesign/post?postID=qKGKJAvX35z4UirTjG0GpenaM5zR1s7IdGiapwHAXryU5LTk2KeyuJT990YlteNU4aSeT-MwYA">info@alceng.com</a> Web : <a href="http://www.alceng.com">http://www.alceng.com</a>Received on Fri Mar 22 00:52:00 2002
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