It depends on the specific industrial practice.
For Nuclear Power Plants the seismic loading is a must. Not only that the
entire rotating component (e.g. pump) is modelled in FEM and seismically
qualified. Qualification is not only checking of stress but also
clearances, deformations etc.
However it is not so for Process Plants and Petrochemicals. Depending on
the project design basis seismic loading is either considered or not . For
some projects we had to include the seismic loading and for others only
stresses were checked and not the nozzle loadings.
API does not clearly specify the category of loads for its allowable. The
matter becomes more difficult if the vendor is consulted in which case the
consequence is a known one (i.e. allowables are inclusive of the seismic
loadings to doubly safe guard the equipment).Thus it becomes the designer's
prerogative to include or not to include the seismic loadings.
From my experience of Nuclear Power, Process and Petrochemical industries
I feel including the seismic loadings is not much meaningful if the
rotating equipment itself is not seismically qualified.
Rgds
TANMOY SABUD <tsabud@yahoo.com> on 09/25/2002 05:50:30 PM
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Subject: Re: [PipingDesign] Forwarded message: Welcome to PipingDesign
DEAR RAKESH,Geoff & all members
thanks a lot. actually iam working in one of the
middle east project where seismic is more prone than
wind. the actual problem is the allowable nozzle
loading of the rotating equipment. stress is not a
problem. Do you consider seismic loading while
checking your rotating equipment?
regards
tanmoy
Texas Flange - a good source for information on industrial flanges, all
they ask is for referrals for designs they help with.
877-610-8924.
www.texasflange.com
Your use of Yahoo! Groups is subject to <a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a> Received on Thu Sep 26 00:19:00 2002
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