shouldnt this read as " ... B31.3 refers the designer to Appendix 2 of Section VIII Div.1," for the design of flanges. But then again Appendix 2 does not consider external loads. On occasion, cause of flange leak is due to external forces and moments (refer to as the equivalent pressure). If the culprit is the external load, then As Chris W. says the combined load must be considered (design pressure + P equiv). It is these combined load that u use to perform the Appendix 2 analysis.
-----Original Message-----
From: Ben Nottingham [mailto:bnottingham@chartertn.net]
Sent: 23 August, 2001 6:29 AM
To: PipingDesign@yahoogroups.com
Subject: RE: [PipingDesign] Failure on Relief Valve
Reaction force calc by ASME B31.1, Appendix II, has many steps and is a good
application for spreadsheet template. The calculation uses Fanno lines that
may also be determined from
http://grumpy.aero.ufl.edu/gasdynamics/fannofull.html .
Ben
-----Original Message-----
From: Rudiawan@Kvaerner.com [mailto:Rudiawan@Kvaerner.com]
Sent: Wednesday, August 22, 2001 12:33 AM
To: PipingDesign@yahoogroups.com
Subject: [PipingDesign] Failure on Relief Valve
On my project , I have the problem on relief valve system. Now the bolt on
the upstream and downstream all is loosen due to vibration. The set pressure
is 68.9 barg and the size is 6" x 8".
How to calculate the force reaction when the relief valve popping ?
How to design a good support to protect the loosing bolt cause by vibration
?
How to check the strength of flange on bolt due to reaction force on relief
valve?
Thank's
rudiawan
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Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Received on Thu Aug 23 03:30:00 2001
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