×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Basis for ASME B16.5 Flange Ratings

Basis for ASME B16.5 Flange Ratings

Basis for ASME B16.5 Flange Ratings

(OP)
Can anyone shine a light as to how the flange pressure - temp ratings in B16.5 are derived?
Calculations?
Flanges tested to destruction?
Everyone I ask doesnt actually know

RE: Basis for ASME B16.5 Flange Ratings

Yes, by calculation from established equations in Annex B of ANSI B16.5. All of the information for establishing pressure-temperature ratings is contained Annex B of ANSI B16.5. The title of this Annex is "Method used for Establishing Pressure Temperature Ratings"

RE: Basis for ASME B16.5 Flange Ratings

In ASME B16.5 - 1996 Edition, the subject is in Annex D.

RE: Basis for ASME B16.5 Flange Ratings

Wher these flanges calculate once and for all using ASME VIII div.1, appendix 2 ????/

RE: Basis for ASME B16.5 Flange Ratings

ASME flanges generally will not calculate for their stated B16.5 pressure-temperature ratings when calculated per ASME Section VIII-1.

-Christine

RE: Basis for ASME B16.5 Flange Ratings

Sorry, a mistake, so I will re-state my question:

Wher these flanges ALREDY AND BEFORHAND, ONCE AND FOR ALL FOR A RANGE OF PRESSURES AND TEMPERATURES, calculateD  using ASME VIII div.1, appendix 2 ????/

I OTHER WORDS WHAT IS THE BASIS AND THEORY BEHIND B16.5

Something I now , is that ASME VIII -Appendix 2, is based on LA FORGE (?) ....

RE: Basis for ASME B16.5 Flange Ratings

No, they are calculated per ASME B16.5.  The equations in the annex are different than the procedure used in Section VIII.

This brings up my post from the other forum.  Appendix 2 added flange rigidity as a mandatory calulation.  We design self energzing (o-ring) flanges and have never had an issue with leakage due to flange distortion.  Now, for some reason, ASME is forcing us to increase our flange thickness.  What is the reason for this change?  We have many flange in stock that are now scrap.

Also, ASME B16.5 flanges are allowed per Section VII even though they fail the Appendix 2 calculations.  This is a major contridiction.

RE: Basis for ASME B16.5 Flange Ratings

I disagree. Carefully read Mandatory Appendix 2, paragraph (c). It provides the rationale for the calculations and exemptions to using the calculations.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources