PFI ES1-2010
$12.35
Internal Machining and Solid Machined Backing Rings for Circumferential Butt Welds
| Published By | Publication Date | Number of Pages |
| PFI | 2010 | 9 |
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).
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