Re: [PMX:#] Fire Case

From: <Rajesh.Balapure@ril.com>
Date: Fri Sep 12 2003 - 07:53:00 EDT

=====>>>>
Is the piping system required to be operational during this case. If yes, then I think you should design it for the temperature.

The fire case temp. for a line was decided based on the releiving temp. at which the relief valve is designed for.Hence the unless the piping will be operational ,releif valve wont discharge the fluid at worst temp. for which it is designed for otherwise no need to design releief valve too for that temp.

======>>>>
It would have been more appropriate to have instrumentation in place that will cause a local shut down of the system instead, had it not been the flare header.

Regarding the instrument that will cause local shutdown of the system instead,
I too think it is more appropriate but I do not have any idea about it neither any more Information about it.

====>>>>

Even if you consider this to be an occasional load case. It is only the piping allowable stress that has an increment. I do not know whether the loads that is to be used for the civil design is in any way less on the same lines
----------->>>>Civil structure allowable stresses too will have an Increment,Hence it may take the loads of Fire Case as an occassional Loads.

Regards,
Rajesh V Balapure

                       "Sajit"
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                       o.uk>                    cc:       (bcc: Rajesh V
Balapure/JAMNAGAR/RIL)
                                                Subject:  [PMX:#] [PipingDesign]
Fire Case
                       09/11/2003 05:24   Importance: Normal  Sender's OU:
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                       PipingDesign

Dear Rajesh,

Can you in consultation with your process dept. describe the "Fire case". so that the group understand better.

As said by Tushar, Is the piping system required to be operational during this case. If yes, then I think you should design it for the temperature. Even if you consider this to be an occasional load case. It is only the piping allowable stress that has an increment. I do not know whether the loads that is to be used for the civil design is in any way less on the same lines.

It would have been more appropriate to have instrumentation in place that will cause a local shut down of the system instead, had it not been the flare header.

Sajit

[Non-text portions of this message have been removed]

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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 Fri Sep 12 07:53:00 2003