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PFI ES1

2010 Edition, September 1, 2010

Complete Document

INTERNAL MACHINING AND SOLID MACHINED BACKING RINGS FOR CIRCUMFERENTIAL BUTT WELDS



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Product Details:

  • Revision: 2010 Edition, September 1, 2010
  • Published Date: September 2010
  • Status: Active, Most Current
  • Document Language: English
  • Published By: Pipe Fabrication Institute (PFI)
  • Page Count: 9
  • ANSI Approved: No
  • DoD Adopted: Yes

Description / Abstract:

This Standard covers the dimensioning of solid machined backing rings and the internal machining of seamless and welded piping components for use with these rings.

Piping components must be internally machined to a close tolerance to accept solid machined backing rings. For this reason, solid machined backing rings are not recommended for use with piping components with wall thickness less than 0.562" (14mm).