Pressure Vessels and SIF

As we have discussed many times, I am a strong advocate of the SIF approach to risk management. Growing up in the PSM arena, we realize that the entire process safety effort is built on the SIF model. However, for those unfamiliar with managing catastrophic risks, SIF can become just another “flavor of the year” safety parade. However, for those seeking a topic to build their SIF efforts, there is one area that presents numerous opportunities: Pressure Vessel Management.

Regardless of its purpose, any vessel designed to operate at pressures exceeding 15.0 psig carries an inherent catastrophic risk. It does not matter if it’s not a PSM/RMP PV; in fact, even “air receivers” pose catastrophic risks.

The vast majority of these failures come from either operating beyond its design capabilities/or a lack of proper inspections/maintenance.

Almost all the companies I worked for during my 17 years in chemicals, and most that I work for now as a consultant, have an Excel spreadsheet with every PV on site listed and its design capabilities and location. They also have them in an inspection/maintenance program, precisely like the PSM/RMP PVs.

The same applies to the Pressure Safety Valves (PSVs) that protect these vessels. They have their set points and sizing scenarios, as well as being in an inspection/testing program.

So if you’re looking for an easy SIF launch, consider focusing on your PVs as they certainly pose a SIF risk.

Note: Refer to API 510 or the NB Part 3 for your baseline guidance. If you’re a SAFTENG.net member or SAFTENG client, you can reach out to me via phone/text/email for your FREE guidance.

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