Our main business is in PRD adequacy study. When evaluating the pressure relief requirements for a facility, it is important to examine all possible means by which a pressure relief requirement may arise. All applicable scenarios for a protected system should be evaluated and calculated.

For many systems, one scenario will require the largest orifice area, while another has the highest associated inlet pressure drop, and a third scenario has the highest associated outlet pressure drop. The ability to automatically calculate multiple applicable scenarios is one of the primary advantages of iPRSM over spreadsheet based calculation tools.

iPRSM is a unique solution for the design, audit and documentation of both new and existing pressure relief systems, including the associated disposal (flare) system.

The standard overpressure scenarios as per API 521 can be automatically loaded into a Protected System in iPRSM. For further information on overpressure scenarios, please consult the API 521 guidance document.

Users are not limited to the typical API 521 overpressure scenarios and may define alternative scenarios for their facilities within iPRSM.