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Re-purposing A Heat exchanger to a Higher Temp Lower Pressure

Re-purposing A Heat exchanger to a Higher Temp Lower Pressure

Re-purposing A Heat exchanger to a Higher Temp Lower Pressure

(OP)
Hello all,

I am wanting to slight alter the operation of one of out heat exchangers.

316L Shell and tube heat exchanger

Existing rating 400F @ 180PSI
Proposed conditions maximum temp/pressure 550F @70PSI

My assumption is the temperature increase will have little effect on the pressure rating.

Is there anything required by code to operate under these conditions?

RE: Re-purposing A Heat exchanger to a Higher Temp Lower Pressure

If you are altering the design conditions, then you are performing an alteration of the vessel. You will be required to re-rate the vessel for the new conditions. It will likely be fine, but do the calculations completely anyways - if for no other reason than for your management of change purposes.

RE: Re-purposing A Heat exchanger to a Higher Temp Lower Pressure

(OP)
Figured so. Would an AI be able to do the calculations and re-stamp it?

RE: Re-purposing A Heat exchanger to a Higher Temp Lower Pressure

The AI never does calculations - that's your job. The AI confirms that calculations have been performed. Check NBIC for the requirements (assuming that you are in the US).

RE: Re-purposing A Heat exchanger to a Higher Temp Lower Pressure

(OP)
Thanks.

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