PEI Circuits - Details Page

To open a Circuit Details Page, click on the desired Circuit ID hyperlink in the Circuit main screen (or on any other screen). See IMS Details Page.

The Circuit Details Page can be divided into sections:

Header

The header of the detail page shows the name of the Circuit / Circuit ID and several navigation options.

For more information on the icons see IMS Details Page.

Details

The fields listed in this section are all described in Creating new PEI Circuits.

Setting Inheritance between Circuits and Components

A Component and a Circuit can be set up to be inherit, i.e., Components can be linked to Circuits. In this way the Component can inherit the Circuit specs as well as the CR and RCA, while the Circuit inherits the Component’s Interval Factor (IF). Also, the Circuit will automatically be linked to the Corrosion Loop (CL) to which the Component was added. For more information see Relationship between CLs, Components and Circuits.

When the Circuit inherits the IF from the corresponding RBI Component, the Corrosion Schedule’s NID will be based on the RBI IF, if the Circuit's IF Strategy is set to "SRBI". The linked Component should, in this case, be analyzed for at least one AR DM. When there is no SRBI IF the Circuit will default to the IMS IF. (For more information on how the IF Strategy determines the Circuit IF see Calc Summary tab: Corr Rates IF.)

The inheritance can be set from either the Circuit (see the figure below) or the Component Details page.

For more information on the CR calculations see: PEI Corrosion Calculations and Calc Summary. For more information on the RBI calculations (including the IF) see Risk Based Inspection (RBI) - Theory as well as Step 6 of the Degradation Management Implementation workflow.

Deleting Circuits

To delete a Circuit:

• Go to the Circuit Details Page (see IMS Details Page).

• In the Details section, click Edit.

• Uncheck the Active checkbox to make the Circuit Inactive.

• Click Save.

• Now the Delete button will also show in the Details section.

• Click Delete. Note: Deletion will not be possible if the inheritance is set. You will first need to remove the inheritance.

• A pop-up will ask you to confirm. Review the details and click OK (or Cancel). Note: You may need to first remove an Explicit object.

A pop-up message will appear stating that the deletion of the Circuit was successful.

Schedules

The Schedule section shows by default the active Corrosion Schedules for the Circuit. Each active Circuit requires one active Corrosion Schedule. When a new Circuit is being created, a (default) Corrosion Schedule is autogenerated with a safety-net of 12 months regarding the NID. You can use the filters to see the credited (inactive) Schedules.

Schedule grid:

For more information on Corrosion Schedules see PEI Schedules.

Card View

You can change from grid view to card view. To do this, click the display button  in the top right corner. Each Schedule will then be displayed as a Card.

Filter

You can use the filters to see specific Schedules. By default, it filters for the uncredited Schedules.

For more information on filters see IMS Main Screen (Grid List).

Hierarchy

The Hierarchy grid shows the Equipment, Component and Circuits assigned to this parent Equipment. A Circuit is an area of the Equipment, which is subject to similar Corrosion Rates (internal corrosion). The Components of an Equipment are designed to be assessed in RBI and can cover more than just internal corrosion mechanisms. For more information of how the hierarchy works see PEI Hierarchy.

From here you can also create a New Circuit.

Information from the included Components and Circuits is rolled-up to the Equipment level, such as earliest Remnant Life (RL), earliest Next Inspection Date (NID), based on all assigned Equipment Schedules and the Last Inspection Date (LID).

Summary / Messages

In contrast to regular Inspection Schedules that are credited using an ECH, Corrosion Schedules are credited using a Circuit Calc Summary (i.e. Summary/Messages). This section shows by default the last inspection event for crediting or recalculating the Circuit’s Corrosion Schedule. For more information see PEI Corrosion Calculations and Calc Summary.

CML and CML Measurement History

The CML section provides a list of CMLs for the selected Circuit. The CML tab shows an overview of the CMLs.

CML grid

The CML section is used to create and maintain the applicable CMLs for the selected Circuit. The grid shows a toolbar which can be used to do so.

CML toolbar

The CML Measurement History Tab

The CML Measurement History tab shows the CML Measurement History grid, the Isometrics for the selected CML (when available) and the TrendPlot. 

The CML Measurement History grid show the list of Wall Thickness (WT) Measurements per actual Measurement Point (MP), performed in each Measurement Set (MS) – Measurement date. 

CML Measurement History grid:

For more information on the Measurement quality see Data Quality (Identifying Anomalies).

CML Measurement History toolbar

Too Many CMLs

When you have many CMLs it is advices to manage this Circuit using S-IDAP, and not via the CML Measurement History. You can, however, also use the option Condense dates, as it will then make one column per year.  

Trendplot

You can also view a TrendPlot of the measurements.

To zoom in or out of a specific section of the plot:

• Click the zoom button.

• Then move the markers to the desired positions.

To see the legend of the TrendPlot, click the legend button.

Moving (copying) old Wall Thickness Measurements to "new Equipment"

It is possible to move (copy) CMLs to another Circuit. This way you can also move (copy) old wall thickness measurements to a "new Equipment". Note: A recalculation will happen at both the origin and destination Circuit.

More Information Needed?

For more information on Calc Summary and CMLs see PEI Corrosion Calculations and Calc Summary.

For more information on the trending in S-IDAP see PEI Trending and Corrosion Analysis.

For more information on EVA calculations for Heat Exchangers see PEI EVA.

For more information on the Isometrics see IMS Drawings.

Measurement Set

The inspector dictates which CMLs (and their Measurement Points (MPs)) should be measured at some point, using the configuration rules in IMS. He creates a Measurement Set (MSET) in the configurator for each Equipment where these MPs are registered and stored for Wall Thickness data.

This section shows all MSETs in which the Circuit is included and the current state of the MSET. The table below explains the data grid.

Measurement Set grid

MSET toolbar

It is important to understand the role of Measurements and MSETs in the process of crediting Corrosion Schedules. For other Schedules, we use an ECH / Condition History record to credit the Schedules and create new Schedules when they are recurring.

Corrosion Schedules are always recurring, and an active Circuit requires exactly one active Corrosion Schedule. Instead of crediting the Schedule and creating a new one using an ECH, corrosion Schedules use Measurements/MSETs and Circuit Calc Summaries to credit the Schedule and create a new one.

See also PEI Corrosion Calculations and Calc Summary and PEI Trending and Corrosion Analysis.

Measurement Set Tutorial Video

Specs

Circuit Specifications store the specific operating parameters of a Circuit and its operational status, such as the design code, design pressure, fluid type, insulation, and minimum and maximum temperature. Circuit Specifications can be inherited from the parent (i.e., Equipment). If a spec is being inherited (i.e. Inherit is set to active and shows in read mode), the spec value cannot be modified and is continually aligned with the parent specs.

For more information on the Specs section and also on inheriting Specs see IMS Details Page.

Attachments

In this section pictures, drawings, reports, and other data can be uploaded and saved to be part of the Circuit file. For more information on using the Attachments section see IMS Details Page.