Jump Start: Pressure Safety Valve Sizing in Aspen Hysys

Description

Aspen Technology, Inc. 2013. — 20 p.When designing a chemical process and its equipment, safety is of substantial concern. All possible strategies should be considered to eliminate the risk of accident and injury when implementing a process design. One safety concern that occurs frequently in a plant is the over-pressurization of equipment or piping. In order to prevent dangerous bursts, explosions, and fires, pressure relief valves are designed and installed to bleed out excess liquid or vapor causing pressure build-up. Process conditions vary vastly at each location of a pressure relief valve. Because of this, and the strict regulation of safety equipment, completing a design of a pressure relief valve by hand can be a time consuming and laborious exercise. To solve this problem, Aspen HYSYS V8.3 has a pressure safety valve sizing feature, which uses data from a process simulation to help automate PSV calculations.Aspen HYSYS uses common valve design standards, most notably API 520, 521, to determine pressure relief valve sizing information and values. 25 common overpressure scenarios are included in the program and can be analyzed and sized for.