RE: minimum pipe spool length

M K,

When you say spool, I would interpret it as a straight piece of pipe with flanges each end.

If that's the case the minimum length (F/F) is enough distance so that the bolts can be serviced. My rule of thumb for minimum length is (2) back
to back weldneck flanges for 6" and smaller pipe. One pipe size for 8" and larger.
This I use strictly for straight pipe connections.

But when you have equipment attached on each end of the flanges, e.g. wafer check valve
one end and a butterfly valve the other, then you have to analyze the clear distance when both
valves are fully open.

Hope this help.

Ed

-----Original Message-----
From: <a href="/group/PipingDesign/post?postID=9eEZf8NyJCx7t9sldPAz3HQQMQtGXbuQFuriF3_fao6-eo6wEgLkNCokvkvX8iwYuf4dodt-QMR665FUUciAHmMN">PipingDesign@yahoogroups.com</a>
[mailto:PipingDesign@yahoogroups.com]On Behalf Of dd jdh
Sent: Saturday, January 06, 2007 1:41 AM To: <a href="/group/PipingDesign/post?postID=CuX2-c03ufiJCO4XtHlduDVfAb0BrrcBP1zLF2nfo6dTGjCJwWu_95whlRVTfnTMYxf0xXDuLyTrPhQ17rTkid6QxHujyw">pipingdesign@yahoogroups.com</a> Subject: [PipingDesign] minimum pipe spool length

hi all,

May anyone tell what will be the minimum possible pipe spool length for a butt welded end connection.

As per AWS the minimum pipe spool length required in a line is one NPS. where site condition restricts this minimum requirement, is it possible to adopt

lesser length spools.

thanks and regards,

Sadanandan.M.K

PE middle east

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Received on Mon Jan 08 08:46:00 2007