Chapter 10. Relief Sizing
The learning objectives for this chapter are to understand relief sizing for:
Liquid and vapor service.
Two-phase flow.
Fire exposure.
Liquid thermal expansion.
Relief sizing calculations are performed to determine the vent area of the relief device. Relief sizing is a complex subject with many important subtleties too numerous to present here–experts in this area must be consulted. This chapter presents only a few simple cases. Also, relief sizing technology continues to evolve with time, particularly with respect to two-phase relief sizing.
Relief devices are considered preventive safeguards since they protect process equipment from the effects of high pressure. The pressure relief device might never be used, but ...
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