An introduction of RBI

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Information about An introduction of RBI

Published on February 17, 2009



RBI (Risk Based Inspection) Introduction : RBI (Risk Based Inspection) Introduction Prepared By: Bashir Ahmed Khan Difference Between RBI & Others Inspection Philosophies. : Difference Between RBI & Others Inspection Philosophies. Fixed Interval Condition Based Risk Based Standard inspection or service Interval Trend Analysis Consequences not considered Reactive (Backward looking) Risk Analysis Probability and consequences Proactive (Forward looking) WHAT IS RBI (Risk Based Inspection)? : WHAT IS RBI (Risk Based Inspection)? Risk Based Inspection is a dynamic, Systematic tool for prioratising inspections according to the potential risk associated with specific equipment. RBI systematical evaluated both the probability of failure and the associated consequence of failure. WHY do We Need RBI? : WHY do We Need RBI? RBI reduce risk of high consequences failures Improve the cost effectiveness of inspection and maintenance resource Provide a basis for shifting resources from lower to higher risk equipment Evaluate current inspection plans to determine priorities for inspections Evaluate changes to basic operations as they affect equipment integrity Identify critical contributors to risk that may otherwise be overlooked Measure and understand the risks associated with current inspection programs Incorporate “Acceptable Risk” levels OBJECTIVES OF RBI : OBJECTIVES OF RBI THE PRINCIPLES OF RBI : THE PRINCIPLES OF RBI BENEFITS OF RBI PROGRAM : BENEFITS OF RBI PROGRAM OVERALL BENEFITS OF RBI : OVERALL BENEFITS OF RBI SCOPE OF API RP 580 : SCOPE OF API RP 580 Limitations of RBI. : Limitations of RBI. Human Error Natural Disaster External events (e.g., Collisions or falling object) Secondary effects from nearby units Deliberate acts (e.g., sabotage) Inherent risk in handling hazardous materials. Inspection method detectability Fundamental limitations of the Inspection method Design errors Previous unknown mechanism of Deterioration Type of RBI Assessment : Type of RBI Assessment Qualitative: Provides a broad–based risk assessment of an operating unit or a part of an operating unit, required less detail information about the facility. In this assessment using engineering judgment and experience for the analysis of probability and consequences of failure. Quantitative: Provides risk values for each equipment item and pipe segment in a operating unit, required comprehensive detail information about the facility and equipment. In this assessment using logic models, likelihood and probability data to calculate the risk of failure. Semi-qualitative: Some were between either approach. RBI Levels of Analysis : RBI Levels of Analysis In RBI system there are three (3) levels of Analysis: Level- I (Fully qualitative) It is sound screening tool that quickly highlights the high-risk equipment that users may wish to assess in greater detail. It is paramount to assess high risk areas on which to focus immediate attention. Level- II (Semi quantitative) A step closer to being a quantitative analysis than Level I, and it is a scaled down approach of Level III. Provides most of the benefit of Level III analysis, but it requires less input than Level III. Level- III (Fully quantitative) It is a full quantitative approach to RBI providing the most detailed analysis of the three levels, in this approach risk being quantified in absolute terms. Risk (Definition) : Risk (Definition) Risk Is danger an undesirable event represent for People, Environment and Economic assets. Risk In Risk Based Inspection, risk is defined as the product of two separate terms --- the Likelihood that a failure will occur and the Consequence of a failure. Risk = Probability of Failure X Consequences of Failure What is Risk Management : What is Risk Management Risk management is a process to identify, measure (quantify) and then develop plans to maintain risks at on acceptable level. It is a well known fact that, in general “80% of the failures, occur in 20% of the equipment”. Put in very simple terms (referring to the 80/20 rule), if inspection effort were double on the 20% critical items, whilst being halved on the 80% less critical, an immediately saving of 20% effort is apparent. Risk With or Without RBI : Risk With or Without RBI Risk Level of Inspection Activity Risk with RBI programs Low Risk can achieve with the application of an effective RBI program Risk without RBI programs (No Inspection) Residual Risk always present Risk can not be reduce to Zero due to Human error Natural disasters Design fault etc. ASSESSING PROBABILITY OF FAILURE : ASSESSING PROBABILITY OF FAILURE PROBABILITY OF FAILURE RATING : PROBABILITY OF FAILURE RATING ASSESSING CONSEQUENCES OF FAILURE : ASSESSING CONSEQUENCES OF FAILURE CONSEQUENCE RATING : CONSEQUENCE RATING RISK Matrix : RISK Matrix RBI FLOW CHART : RBI FLOW CHART THANKS FOR YOUR PARTICIPATION : THANKS FOR YOUR PARTICIPATION

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