The Degradation Management (Using S-RBI) Steps
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The Degradation Management (Using S-RBI) Steps
2 Articles in this category
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Written by Elsa Tolsma , Denis Tkalec , Tomislav Renic and 1 others
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Step 1 Define the Asset (and set up the Hierarchy)
Aim Before the Degradation Management can start, the Asset needs to be defined in IMS. This entails two elements: (1) the IMS Hierarchy structure needs to be set up; and (2) the asset information must be collected, verified, and stored...
Written by Elsa Tolsma , Denis Tkalec , Tomislav Renic
Updated on : 16 Aug 2024
Step 2 Identify Threats and Barriers (Define the CL)
"> "> "> "> Aim In this step (as part of the Asset definition) the CL must be defined. This includes a definition of the CL boundaries and a process description. It further includes the identification of the Threats ...
Written by Elsa Tolsma , Denis Tkalec , Tomislav Renic
Updated on : 16 Aug 2024
Step 3 Start S-RBI Analysis and Assign DMs to Components
Aim When the CL is defined ( Step 1 and Step 2 ), an S-RBI Analysis must be started. The first step of an S-RBI Analysis is to assign the appropriate Degradation Mechanisms to each Component, since the S-RBI Analysis takes place on Component l...
Written by Elsa Tolsma , Denis Tkalec , Tomislav Renic
Updated on : 16 Aug 2024
Step 4 Determine most Credible Failure Scenario
Aim When all the Barriers on the Component fail, the DM will cause a failure, i.e., a leak or a rupture. We need to establish what the most likely event is if this happens. This is called the credible failure scenario. The Susceptibility to Fail...
Written by Elsa Tolsma , Denis Tkalec , Tomislav Renic
Updated on : 16 Aug 2024
Step 5 Review the Inspection History and Credit DMs
Aim The aim of this step is to specify the last inspection date for each DM (and review and record the condition status of the Component during the last inspection). See Methodology Step 5 and Software Step 5 .
Written by Elsa Tolsma , Denis Tkalec , Tomislav Renic
Updated on : 16 Aug 2024
Step 6 Estimate RL (AR DMs and CUI)
Aim For AR DMs: Review the Inherited Circuit’s Corrosion Rates (CR) and Allowable Corrosion Rate (ACR), to select a CR and determine the Remaining Life (RL). If present, also take credit for Lining/Coating. See Methodology Step 6 and Softwar...
Written by Elsa Tolsma , Denis Tkalec , Tomislav Renic
Updated on : 16 Aug 2024
Step 7 Determine Susceptibility to Failure
Aim The Susceptibility to Failure should be assessed per DM per Component, according to the specific Special Emphasis Component / DM criteria. The StF, together with the Consequence of Failure ( Step 8 ), will determine the Criticality (...
Written by Elsa Tolsma , Denis Tkalec , Tomislav Renic
Updated on : 16 Aug 2024
Step 8 Rate Consequence of Failure
Aim Determine per Component per DM the Consequences of Failure (CoF) for the Most Credible Failure Scenario (defined in Step 4 ) for the following Consequence categories: Asset: Economic damage to the asset including consequential business lo...
Written by Elsa Tolsma , Denis Tkalec , Tomislav Renic
Updated on : 16 Aug 2024
Step 9 Review Overall Criticality
Aim To review the Overall Criticality, i.e., base risk for (each) Component – DM combination. Criticality, together with Confidence ( Step10 ) and RL ( Step 6 ), is used to determine the Maximum Inspection Interval (MII) and Inspection St...
Written by Elsa Tolsma , Denis Tkalec , Tomislav Renic
Updated on : 16 Aug 2024
Step 10 Assess Confidence
Aim Assess the Confidence in the DM’s forecast, i.e., assessment of StF and the RL (for AR DMs). Confidence, together with Criticality ( Step 9 ) and RL ( Step 6 ), is used to determine the Maximum Inspection Interval (MII) and Inspection Strat...
Written by Elsa Tolsma , Denis Tkalec , Tomislav Renic
Updated on : 16 Aug 2024
Step 11 Review Results – NID, MII, IS, Inspection Effectiveness
Aim The S-RBI deliverables are: A Next Inspection Date (NID) – mainly for AR DMs. An Inspection Strategy (IS) and sometimes Maximum Inspection Interval (MII) – for NAR DMs. A required Inspection Effectiveness* <sup> </sup>– for AR DMs. The ...
Written by Elsa Tolsma , Denis Tkalec , Tomislav Renic
Updated on : 16 Aug 2024
Step 12 Assign S-RBI Results to Schedules and/or update Monitoring Plan
Aim The S-RBI Analysis results, which were reviewed in Step 11 , tell us how and when to inspect / monitor the Components, i.e., how to verify the Barriers. Hardware Barriers are verified through Inspection Schedules at Equipment level - when t...
Written by Elsa Tolsma , Denis Tkalec , Tomislav Renic
Updated on : 16 Aug 2024
Step 13 Barrier Verification - Execute, Analyze, Document
Aim Ultimately, the aim is to verify the status of the Barriers. This is done by means of inspections and monitoring. How and when the inspections and monitoring should take place was specified in Step 12 by assigning the S-RBI results to ...
Written by Elsa Tolsma , Denis Tkalec , Tomislav Renic
Updated on : 16 Aug 2024
Step 14 Maintain Barriers
Aim The aim is to perform corrective actions, which are needed to return the Barriers status to green. See Methodology Step 14 and Software Step 14 .
Written by Elsa Tolsma , Denis Tkalec , Tomislav Renic
Updated on : 16 Aug 2024
Step 15 Review S-RBI Analysis and IOW
Aim Regularly review the S-RBI Analyses and IOWs to make sure that the most recent and applicable information is included in the assessment. This is indicated as an optional step in the cycle, only because it may happen at a frequency that ...
Written by Elsa Tolsma , Denis Tkalec , Tomislav Renic
Updated on : 16 Aug 2024
Calculators
IMS has nine S-RBI calculators interfaced to assist with the assessment. The Calculator tab in the S-RBI Assessment screen provides the following calculators: CUI, UG, tank bottom, HIC/SOHIC, Caustic/Carbonate/Amine/Sulphide/Chloride SCC. Applicab...
Written by Elsa Tolsma , Denis Tkalec , Tomislav Renic
Updated on : 09 Aug 2024
RBI NID Calculation - from Equip Start Date and Inspection Date
Below is an example of how the RBI NID is calculated. Component Start Date The Start date is a mandatory Component property that denotes the date the original Component has been put into use. It does not necessarily have to denote the actual Compo...
Written by Elsa Tolsma , Marko Knezevic
Updated on : 07 Sep 2024