Re: minimum pipe spool length

From: <elie>
Date: Sat Jan 06 2007 - 10:25:00 EST

Other than the minimum spool lengths required for upstream/downstream piping for measurement meters, sampling equipment, pumps, compressoors, etc. Most major companies policy regarding your question is when welding, stay away from the heat effected zone of existing welds, typically 2-3 inches.

In 1988, someone posted a question to ASME 31.3 committee that was published in B31.3 Interpretations No.7 Bulletin. Here is the complete Q&A.

   Reference: Code: B31.3 Interpretations No.7 Bulletin; Interpretation 7.02    Subject: Paras. 304.3.3 and 328; Spacing of Welds    Date: May 24, 1988
   File: 831-87-03

   Question:In accordance with ASME B31.3, are there requirements or guidelines on the minimum distance between welds in a pipe?

   ASME Comittee Reply: No, except as provided in para. 304.3.3(e).

dd jdh <saduemk@yahoo.co.in> wrote:

           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 Sat Jan 06 10:25:00 2007