ASME B16.5 Flange Ratings
ASME B16.5 Flange Ratings
(OP)
Hi All
I have also posted this under the ANSI Eng Tips forum - but it is applicable to ANSI and ASME
I found this post: https://www.eng-tips.com/viewthread.cfm?qid=181686... in my search to a problem I am currently looking at.
My question is was there an error in the 1973 ANSI B16.5 150# flange table for A-105 materials?
If I look at the 1973 version versus the 2017 version, using imperial units we get the following:
Temp °F - 1973 Version - 2017 Version
500F 230psi 170psi
600F 210psi 140psi
650F 205psi 125psi
The differences in allowable pressure is quite large and I can';t believe that the 1973 values are correct.
I seem to remember from around that time that there was an error in the published 1973 tables - yes I am that old!!
I have looked in the history blurb of the 2017 version of ASME B16.5 and it states: "At the same time, comments from users and changes in the ASME Boiler and Pressure
Vessel Code led to significant revisions in the Class 150 rating basis and....etc"
Any clues?
I have also posted this under the ANSI Eng Tips forum - but it is applicable to ANSI and ASME
I found this post: https://www.eng-tips.com/viewthread.cfm?qid=181686... in my search to a problem I am currently looking at.
My question is was there an error in the 1973 ANSI B16.5 150# flange table for A-105 materials?
If I look at the 1973 version versus the 2017 version, using imperial units we get the following:
Temp °F - 1973 Version - 2017 Version
500F 230psi 170psi
600F 210psi 140psi
650F 205psi 125psi
The differences in allowable pressure is quite large and I can';t believe that the 1973 values are correct.
I seem to remember from around that time that there was an error in the published 1973 tables - yes I am that old!!
I have looked in the history blurb of the 2017 version of ASME B16.5 and it states: "At the same time, comments from users and changes in the ASME Boiler and Pressure
Vessel Code led to significant revisions in the Class 150 rating basis and....etc"
Any clues?
Talk To Other Members
RE: ASME B16.5 Flange Ratings
https://www.eng-tips.com/viewthread.cfm?qid=454965
RE: ASME B16.5 Flange Ratings
I actually found the historical details document posted by LittleInch myself via a google search.
The history doesn't actually say what was done/changed in the ANSI standard, but obviously the published ratings in the 1973 version were incorrect.
Like I said above I seem to have a niggling memory of this and there was a bulletin sent out at the company i was working for (Fluor at that time) that the 150# table was incorrect.
RE: ASME B16.5 Flange Ratings