Ovality of bent piping/tubing

rajae312 · **Posted:** Wed Oct 12, 2011 11:06 am

Hi all there!
Can any body help me locate ovality tolerance for bent piping / tubing in ASME-VIII 1 please.
if not in the specified code then what is the standard practice for the parameter defined above and referece please.
Thanks in advance.....

Javed Nasir · **Posted:** Wed Oct 12, 2011 11:17 pm

PFI ES24 shall be a good document for you regarding the ovality of pipe and tubes bending. This document is referenced in ASME B31.1.

amol · **Joined:** Mon Sep 01, 2008 2:40 pm **Posts:** 64

YOU CAN USE FOLLOWING FORMULA WHICH IS SPECIFIED IN SECTION III NB (CLAUSE NB-4223.2)

OVALITY OF PIPING AFTER BENDING SHALL NOT EXCEED 8% WHICH SHALL BE DETERMINED AS BELOW :
100 X (DMAX - DMIN.)/DO
DO- NOMINAL PIPE OUTSIDE DIAMETER
DMAX- MAXIMUM OUTSIDE DIAMETER AFTER BENDING
DMIN - MINIMUM OUTSIDE DIAMETER AFTER BENDING

Ovality of bent piping/tubing

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