Design a staggered depressurization sequence for flare systems
Emergency depressurization is one of the most important design provisions for safeguarding facilities in case of an emergency. To overcome limitations of flare system capacity during such a scenario, depressurization can be practiced in a sequential manner. Presented here are the criteria and calculation methods for designing sequential depressurization, along with guidelines for the implementation of recommended designs.
Emergency depressurization is one of the most important design provisions for safeguarding facilities in case of an emergency, such as a fire or an exothermic runaway reaction, that can cause catastrophic failure of equipment and loss of containment. Depressurization reduces failure potential by decreasing the internal stress, thereby extending vessel life at a given temperature. By reducing vessel inventory, the depressurization of a pressurized vessel minimizes the impact of vessel leakage and rupture.
A gas processing plant is typically divided into various isolatable sections (e.g., gas inlet manifolds, inlet separators, a gas sweetening unit, a gas dehydration unit, etc.), each isola
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