Post Forming Heat Treatment Requirement
Post Forming Heat Treatment Requirement
(OP)
Dear All
I was trying to understand the requirements for PostFabrication Heat Treatment of a pressure vessel. My problem is that I do not know the strains in Table UG-79-1 are in per cent or do I have to multiply it by 100 to obtain the per cent of the strain.
I was trying to understand the requirements for PostFabrication Heat Treatment of a pressure vessel. My problem is that I do not know the strains in Table UG-79-1 are in per cent or do I have to multiply it by 100 to obtain the per cent of the strain.





RE: Post Forming Heat Treatment Requirement
RE: Post Forming Heat Treatment Requirement
Try to do a minimum effort to understand before post.
In table UG-79-1 you can see in the formula for tube and pipe bends the number 100.
Regards
r6155
RE: Post Forming Heat Treatment Requirement
RE: Post Forming Heat Treatment Requirement
Date Issued: 06/11/2001
Record Number: BC01-288
Interpretation Number : VIII-1-01-57
Question(s) and Reply(ies):
Question (1): A 2:1 ellipsoidal head is being fabricated from flat plate having a thickness t with a spherical radius of 0.90D and knuckle radius of 0.17D, where D = inside diameter of the head, based on UG-32(d) of Section VIII, Division 1. When applying UCS-79, where there is not an intermediate heat treatment performed during the forming operation, is the original center line radius equal to infinity and the final line radius equal to 0.17D + t/2?
Reply (1): Yes.
Question (2): Does the head described in Question (1), which is manufactured as a flange and dished head, and a head formed having the exact dimensions of a 2:1 ellipsoidal shape both meet the requirements of UG-32(d)?
Reply (2): Yes.
RE: Post Forming Heat Treatment Requirement
Strain is a proportion range between 0 and 1. If you like expressed as a percentage then multiply x 100
The Same is: The elongation is the increase in length of the gage length, expressed as a percentage of the original gage length.
Regards
r6155
RE: Post Forming Heat Treatment Requirement
Regards
r6155