API 580 and ASME PCC-3: One RBI Story, Two Roles

Abstract ASME PCC-3-2022 standard and API 580 are compared in the context of implementing Risk-Based Inspection (RBI) programs for pressure equipment. Both standards define risk as a function of the probability and consequence of failure and offer guidance on using qualitative, semi-quantitative, or quantitative risk assessment methods. ASME PCC-3 provides detailed, prescriptive procedures for RBI implementation, focusing on risk categorization, damage mechanisms, inspection planning, and mitigation. It is designed for broad applicability across industries and includes a formalized process for quantifying risk and updating risk rankings. API 580, while aligned in principle, is more flexible and serves as a recommended practice tailored to the oil, gas, and chemical industries. It emphasizes integration with existing inspection and mechanical integrity programs and relies on API 581 for quantitative methodologies.