Bending of pipe to ASME B31.3 : dimensions
Bending of pipe to ASME B31.3 : dimensions
(OP)
Does ASME B31.3 Module 6. "Bending and Forming" specify which should be used as bending radius for 3D bends; Nominal or outer diameter of pipe?
Thanks, Espen
Thanks, Espen





RE: Bending of pipe to ASME B31.3 : dimensions
RE: Bending of pipe to ASME B31.3 : dimensions
We may use bend radius with R/D = 1.5, following with squezee and sizing after bend.
For your reference :
1. For material Carbon Steel (P-1), post cold heat treatment is never required
2. For material P-4 and P-5A, post cold heat treatment is required if R/D < 2
3. For material P-5B, post cold heat treatment is required if :
A. R/D < 2.5 shall normalizing and tempering
B. R/D >= 2.5 shall stress relieving
Regards