When calculating heat exchanger shell thickness according to pressure vessel formula it is found that the required thickness always much less than the original existing exchanger. I want to know the reason behind it.
Answers
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08/02/2010
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A:
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Ralph Ragsdale, Ragsdale Refining Courses, ralph.ragsdale@att.net
The pressure ratings of heat exchangers are usually dictated by the process configuration and locations of the pressure relief valves, particularly if there is a train of exchangers in the flow scheme associated with "other" vessels.
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08/02/2010
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Celso Pajaro, Sulzer Chemtech, celso.pajaro@sulzer.com
After you calculate the thickness you need to choose the higher commercial material thickness, also the maximum stress allowed for some materials was modified at the end of 90's
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