Effective Emergency Relief System (ERS) design helps companies meet risk-management goals, compliance requirements, and sound business practices. ioMosaic provides a total ERS solution with our comprehensive ERS design services, from reactivity testing for design basis determination to calculations for Z-axis deflection from dynamic loads.
Our team has decades of experience performing PRFS analysis and design.
Our risk-based approach helps mitigate near-unventable scenarios to a tolerable level of risk.
Better evaluate hazards in your facility with an accurate process simulation.
Delivering properly designed pressure relief systems that save both money and time.
Reasonable estimates of the expected time to failure (ettf) or expected time to yield (etty) are required and necessary for effective risk management as well as effective emergency and fire protection and response. Read this paper for a demonstration of calculating ettf or etty in fire exposure scenarios with Process Safety Office® SuperChems™.
With the increased regulatory focus on pressure relief and flare systems (PRFS) design basis, many companies are in the process of updating their existing relief systems design documentation. A very important aspect of any relief systems analysis is the correct identification of overpressure scenarios, and one way to ensure successful and accurate overpressure scenario development is to conduct this process as a team. This approach is currently in effect at many major oil and petrochemical companies including BP, Shell, Chevron Phillips, Bayer, etc., even though current relief systems recognized and generally accepted good engineering practice (RAGAGEP), does not call for this approach.
The benefits of a team-based approach to overpressure scenario development include participation and consensus from all affected disciplines: engineering, operations, instrumentation and control, maintenance, and process safety. Unique insights can be provided through operational experience, and there are opportunities to confirm correct operating and design conditions. In the same way that a process hazard analysis (PHA) is conducted using a team approach; so should the relief systems rationale.
This paper outlines the basic steps involved in overpressure scenario identification, the way that a team approach can be implemented, and the benefits of a team-based approach to overpressure scenario development.
Table 1. Common Contingencies Cross-Referenced to Type of Equipment.
This PSE module performs efficient tracking of process safety related data and analysis. A customized workflow allows for a specific operating unit or the entire facility to be studied and evaluated for compliance.
A major petroleum company recently increased production capacity and required an analysis of its existing relief systems to validate performance and design. As a result of increasing production capacity and debottlenecking studies, several refinery units were found to be operating at charge rates higher than the design basis for the relief systems documentation.
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