AbstractCriticality-Based Maintenance (CBM) is a prioritized approach to the maintenance of process equipment in the oil, gas, and petrochemical processing industries. CBM equally weighs process and safety issues in establishing criticality, which gives companies a return on investment for mechanical integrity efforts while establishing compliance with governmental regulations. This approach optimizes the effectiveness of mechanical integrity programs by focusing on the most important, or critical equipment items.CBM uses a criticality ranking process which is very similar to the methodology used in a process hazard analysis study. All process equipment items are evaluated and then each is given a relative value in an overall criticality hierarchy. With all equipment evaluated for criticality, prioritization of maintenance activities begins.

17 Nov 1996·Safety Engineering and Risk Analysis

“Appropriate Equivalent Methodology” for Pressure Relief System PHAs

Author: Berwanger, Patrick C. ; Kreder, Robert A.

AbstractThis article presents the “Berwanger Method”, a step by step process for designing or analyzing a pressure relief system to meet OSHA 1910.119 Process Safety Information (PSI) and Process Hazard Analysis (PHA) mandates. The author demonstrates that, to ensure safe operation and regulatory compliance, the pressure relief design information management system must be based on an equipment list. The previously common practice of using a relief device list as the basis of “verifying” the design is now recognized as incomplete because this method cannot ensure and document that all equipment is in fact protected.The author also shows how an electronic relational database can be used to maintain the design information.

Chemical Engineering Progress

Use criticality-based maintenance for optimum equipment reliability

Author: Ciliberti, V. Anthony

Here is a systematic approach to regulatory compliance and optimization of process capacity and quality.The premise is prioritizing maintenance programs based on projected consequences of equipment failure.This results in better use of limited resources for improved plant operation.

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