PFI-ES-1 › Complete Document History
Internal Machining and Solid Machined Backing Rings For Circumferential Butt Welds

Complete Current Edition:
   2010 EDITION - INTERNAL MACHINING & SOLID MACHINED BACKING RINGS FOR CIRCUM - Jan. 1, 2010

Obsolete Revision Information:
   DOD ADOPTION 1 - FYI ONLY: DOD ADOPTED - July 8, 2004
   2004 EDITION - INTERNAL MACHINING & SOLID MACHINED BACKING RINGS FOR CIRCUM - Jan. 1, 2004
   1992 EDITION - REAFFIRMED IN 2001 - Jan. 1, 1992
   1986 EDITION - INTERNAL MACHINING & SOLID MAC - Jan. 1, 1986