Pressure Relief Devices (PRDs) play a critical role in preventing overpressure events that can result in loss of containment, equipment damage, and unplanned downtime for pressure vessels, boilers, and other pressurized systems. Knowing which PRDs present the greatest risk to your facility and how often they need to be inspected is critical to mitigating the risk of PRD failure.
Pressure Relief Device Risk-Based Inspection (PRD RBI) is used to assign risk to PRDs based on probability of failure (POF) and consequence of failure (COF) calculations and can help your facility adjust its inspection intervals and resource allocations based on this calculated level of risk. However, despite the multitude of benefits PRD RBI provides, this approach has not been easily adopted by the industry due to its complexity.
Many facilities use API RP 581 methodology as a starting basis for PRD RBI. However, existing API 581 RBI PRD calculations are inconsistent, challenging to interpret, and contain errors. To address these concerns, we developed a tool with model improvements to the calculations. Additionally, the proposed updates to these calculations were submitted and accepted by the API RP 581 subcommittee and will be included in the Fourth Edition release.
Learn more about the project that resulted in the development of the tool below.