PFI - Pipe Fabrication Institute

PFI ES-7

2017-09-04T18:49:40Z

PFI ES-7; Minimum Length and Spacing for Welded Nozzles PFI - Pipe Fabrication Institute This Standard covers the minimum recommended length, distance from open end on run, and spacing dimensions of adjacent welded nozzles.

PFI ES-1

2017-09-04T18:17:48Z

PFI ES-1; INTERNAL MACHINING AND SOLID MACHINED BACKING RINGS FOR CIRCUMFERENTIAL BUTT WELDS PFI - Pipe Fabrication Institute 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).

PFI ES-22

2017-09-04T18:08:18Z

PFI ES-22; Recommended Practice for Color Coding of Piping Materials PFI - Pipe Fabrication Institute The intent of this standard is to provide a system for easy identification of piping materials by general material classifications.

PFI ES-3

2017-09-04T17:33:57Z

PFI ES-3; FABRICATING TOLERANCES PFI - Pipe Fabrication Institute This standard covers general pipe shop fabricating tolerances for prefabricated piping assemblies.