API RP 581 - Risk Based Inspection Technology

API RP 581, Risk-Based Inspection Technology, Third Edition, is a recommended practice developed and published by the American Petroleum Institute (API). Originally released in 2000 and last updated in April of 2016 (third edition), the purpose of this publication is to provide quantitative risk-based inspection (RBI) methods that support the minimum guidelines presented by API RP 580. This document details the procedures and methodology of RBI, an integrated methodology that uses risk as a basis for prioritizing and managing an in-service equipment inspection program by analyzing both the likelihood and the consequences of equipment failure. .

Risk-based inspection (RBI) is a methodology that involves quantitative assessment of the probability of failure (PoF) and the consequence of failure (CoF) associated with each equipment item in a particular process unit. A properly-implemented RBI program categorizes individual pieces of equipment by their risks, prioritizes inspection efforts, and provides guidance for risk mitigation efforts, such as changes in materials of construction, the addition of linings, changes in operating conditions, etc.

API RP 581 was based on the knowledge and experience of several global practitioners of RBI with extensive experience in its implementation. According to API 581, an RBI program has four major goals:

  1. Identify and measure risk for all covered equipment.
  2. Impart an accurate understanding of risks and risk drivers.
  3. Enable effective risk management.
  4. Reduce risks associated with operating processing facilities.


Related Topics

API 560 - Fired Heaters for General Refinery Service API 570 - Piping Inspection Code API RP 1173 - Pipeline Safety Management Systems API RP 1176 - Assessment and Management of Cracking in Pipelines API RP 571 - Damage Mechanisms Affecting Fixed Equipment in the Refining Industry API RP 576 - Inspection of Pressure-Relieving Devices API RP 579 - Fitness-For-Service (FFS) API RP 580 - Risk Based Inspection (RBI) API RP 75 - Developing a Safety and Environmental Management Program for Offshore Operations API RP 939-C - Guidelines for Avoiding Sulfidation (Sulfidic) Corrosion Failures in Oil Refineries API RP 941 - Steels for Hydrogen Service at Elevated Temperatures and Pressures International Organization for Standardization (ISO) PAS 55

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