RBI Components
About RBI Components
In Risk Based Inspection, you can divide asset into components whose risk you want to analyze using an RBI 581 Risk Analysis. You can divide a piece of asset into components based on shared degradation mechanisms. Each sub-part of the asset that shares the same degradation mechanisms will belong to the same RBI Component.
In APM, the information related to an RBI component is stored in the following Criticality Calculator RBI Component records:
- Criticality RBI Component - Cylindrical Shell
- Criticality RBI Component - Exchanger Bundle
- Criticality RBI Component - Exchanger Header
- Criticality RBI Component - Exchanger Tube
- Criticality RBI Component - Piping
- Criticality RBI Component - Pump Compressor Casing
- Criticality RBI Component - Tank Bottom
- Criticality RBI Pipeline Segment (only if the Pipeline Management license is active)
Heat Exchanger
Consider a Heat Exchanger, which is a piece of asset that contains the following components:
- A Cylindrical Shell that makes up the Heat Exchanger Shell section.
- A Cylindrical Shell that makes up the Heat Exchanger Channel section.
- Any number of small tubes that make up the Heat Exchanger Bundle section.
Each of the components can contain items such as Nozzles, Flanges, or Piping.
In RBI, to analyze the ways in which the exchanger can fail, you must divide the components into logical groups that represent common failure characteristics. Each group of components is a separate component and is represented by a single RBI Component record. Keep in mind that some of these groups are involved in the overhead system, and others are involved in the cooling water system.
For example, you might group the asset's components as follows:
- Heat Exchanger Shell: Includes a cylindrical shell, an inlet nozzle, an outlet nozzle, and a head, often referred to as a shell cover. The Shell is part of the Cooling Water System (blue) because the purpose of the shell is to allow water to flow over the tubes and cool the process fluid running through the channel and bundle section of the exchanger.
- Heat Exchanger Channel: Includes a cylindrical shell, an inlet nozzle an outlet nozzle and a flat head, often referred to as a dollar plate. The Channel is part of the OVHD System (yellow) because the purpose of the Channel is to funnel the process fluid in to the tubes and allow cooling of the process fluid running through the channel and bundle section of the exchanger.
- Heat Exchanger Bundle: Includes tubes, baffles, and a tubesheet. The Bundle is part of the OVHD System (yellow) because the purpose of the bundle is to provide as much surface area as possible for the process fluid in to the tubes and allow cooling of the process fluid running through the bundle section of the exchanger.
If you create an RBI 581 Risk Analysis using this example, your database contains the following records:
- Unit / Area (Functional Location record)
- Overhead System (Corrosion Loop record)
- Cooling Water System (Corrosion Loop record)
- Heat Exchanger (Asset record)
- Heat Exchanger Shell (Criticality Calculator RBI Components record)
- Heat Exchanger Channel (Criticality Calculator RBI Components record)
- Heat Exchanger Bundle (Criticality Calculator RBI Components record)
About Integration with Thickness Monitoring (TM)
This topic has been intentionally excluded from the APM product documentation website. This topic is available to you via the product documentation that is provided within the APM system.
About Using TM Analysis Values at the Thickness Monitoring Location (TML) Group Level
This topic has been intentionally excluded from the APM product documentation website. This topic is available to you via the product documentation that is provided within the APM system.
About Using TM Analysis Values at the Asset Level
This topic has been intentionally excluded from the APM product documentation website. This topic is available to you via the product documentation that is provided within the APM system.
Access an RBI Component
Procedure
Create an RBI Component
About This Task
This topic describes how to create a new RBI Component and link it to an Asset or a Corrosion Loop. You can also link an existing RBI Component to an Asset or a Corrosion Loop.
Procedure
Results
- The RBI Component inherits linked Potential Degradation Mechanisms from the RBI Corrosion Loop.
What To Do Next
Access the Inventory Group of a Component
Link RBI Components to an RBI Corrosion Loop
About This Task
This topic describes how to link existing RBI Components to an Asset or Corrosion Loop. You can also create a new RBI Component.
Procedure
Results
-
The PDMs that are linked to the Corrosion Loop are linked to the RBI Components, in addition to the ones that are directly linked to the component.
What To Do Next
Unlink an RBI Component from an RBI Corrosion Loop
Procedure
Link Potential Degradation Mechanisms (PDMs) to an RBI Component
About This Task
This topic describes how to link one or more PDMs to an RBI Component. You cannot create PDMs; you can only link them. Therefore, a PDM must already exist to be linked to an RBI Component.
Procedure
Suggest and Link PDMs to an RBI Component
Before You Begin
About This Task
The APM provides an option to automatically suggest Potential Degradation Mechanisms (PDMs) based on criteria provided in the RBI Component fields. User can then decide whether to link the suggested PDMs to the RBI Component. The suggestions are generated using the RBI Degradation Mechanism Screening Policy. Screening criteria for each PDM is referred from API 581 and API 571. Both the documents are recommended practices and provides guidelines on how to screen components for individual degradation mechanism.
Additional guidelines or good engineering practices defined within these documents are not made mandatory for suggestion purposes. Also, customers might be defining screening criteria based on historical data. Customers requiring these additional guidelines to be included for suggesting PDMs can make suitable changes to the policy. For more information, refer Policies Used to Suggest PDMs topic.
The baseline policy suggests the following Thinning and Lining Damage Mechanisms for the components based on the criteria.
- 581-Atmospheric Tank Bottom Corrosion
- 581-Cooling Water Corrosion
- 581-Soil Side Corrosion
- 581-Internal Component Lining Damage
- 581-High Temperature Oxidation
- 581-High Temperature Sulfidic and Naphthenic Acid
- 581-Sulfuric Acid Corrosion
- 581-Hydrofluoric Acid Corrosion
- 581-Hydrochloric Acid Corrosion
You can add sub-policies for each degradation mechanism type that you want to automatically suggest in the RBI Degradation Mechanism Screening Policy.
This topic describes how to use the suggested PDMs to link to an RBI Component.
Procedure
What To Do Next
Unlink a Potential Degradation Mechanism (PDM) from an RBI Component
Procedure
Link an RBI Component to a TML Group
Before You Begin
- The value in the Source of Calculated Corrosion Rates field in the RBI Component must be Component.
- The parent Asset of the RBI Component must not be a Thickness Monitoring Piping Asset.
- You must have an active license for the Thickness Monitoring module.
Procedure
Results
-
An RBI Component linked to a TML Group inherits the TM corrosion rate values from the TML Group. If the component contains an RBI 581 Thinning and Lining Damage Mechanism Evaluation, the resulting damage factor value will be based on the corrosion rate determined by the value in the Selected Corrosion Rate field.
Apply an RBI Component
About This Task
When you apply an RBI Component, you make a copy of the original record. The applied RBI Component is not automatically linked to the original RBI Component's Corrosion Loop. Instead, the applied RBI Component can be linked to the same or a different asset and then to a Corrosion Loop.
Procedure
What To Do Next
Inactivate an RBI Component
About This Task
- The icon for the RBI Component changes to in the RBI Tree.
- The value in the Component Status field is set to Inactive.
- The state of the RBI Analyses in the RBI Component are set to Archived (only if there is a valid operation from the current state of the analyses to Archived).
- The RBI Recommendations linked to the archived analyses are set to Archived. If, however, an RBI Recommendation is in the Consolidated or Superseded state, it is not set to Archived - only the master Recommendation is archived in this case.
- If the Asset associated with the RBI Component contains an Inspection Plan in the Approved sate, it is changed to the Modified state. If, however, the Use Alternative Inspection Plan Process feature is enabled, the Inspection Plan will not be changed to the Modified state; you must update the Inspection Plan to regenerate the Inspection Plan details.
- Risks linked to the Asset Strategy of the associated Asset are deleted.
- You cannot reactivate an RBI Component.
- You cannot inactive an RBI Component if the associated Asset contains an Asset Strategy in the Pending Review state.
Procedure
Delete an RBI Component
View RBI Component in the Unit Summary Workspace
Before You Begin
To view the RBI Component in the Unit Summary Workspace, the RBI Component you have selected must be linked to an RBI Corrosion Loop.