PEI Trending and Corrosion Analysis

This online manual explains how to: Process, analyze and visualize Wall Thickness (WT) data from one or more Circuits from one or more pieces of Equipment or Corrosion Loops (CLs) to: Detect Anomalies in the WT readings. Flag rea...

S-IDAP uses Dynamic Linear Model (DLM) Corrosion Rate Calculations. Wall loss through corrosion by nature is a time dependent process. However, since the environmental and process conditions are usually varying over time, it is seldom a strictly lin...

The data (from multiple Circuits) can be selected from: Equipment Main Screen / Details Page, Circuit Main Screen / Details Page, or Corrosion Loop (CLs) Main Screen / Details Page. To select the data: Select the Equipment / Circuit(...

After you have selected the Circuits of interest an overview of the Equipment and Circuits is given (in View 1 (opening screen) ). Selecting the Circuits for Data Analysis The first step is to select one or more Circuits for which the data anal...

There are three views in the S-IDAP module. View 1: The opening screen The screen is divided into the following items: The Equipment and Circuits overview . Calc Summary . Approval panel . Results Tab . Measurements Tab . ...

The Results tab is available in View 1 (opening screen) . The purpose of the Results tab is to show which CMLs/MPs have Anomalies and to provide an overview of the different Corrosion Rates for the MPs. Results Grid Information In the grid, th...

The Measurements tab is available in View 1 (opening screen) . The Measurement tab shows the hierarchy, the readings and the status of the readings. In a cell, on the right side of the reading, we can have the character L, S, B, W, E, T, G, V ...

The Overview Plot tab is available in View 1 (opening screen) . With this tab selection, the screen displays the Corrosion Rate, the Remnant Life, or the Wall Thickness of each CML and their measurement position in a bar chart. So, the number of ...

The Histogram tab is available in View 1 (opening screen) . This tab displays the selected Corrosion Rate or the Remnant Life in a histogram. In the example below, higher Corrosion Rates are present in one or more Circuits. Next to the selection ...

The TrendPlot tab is available in View 1 (opening screen) . This plot shows the data based on the S-IDAP algorithm. The example above shows the following items: The plot on the right side is from the selected row in the Results tab or or Me...

The Isometric tab is available in View 1 (opening screen) . By selecting this tab, the AutoCAD isometric is displayed. Screen functionalities Colouring CMLs: You can choose to colour the CMLs using the following options from the dropdown box...

The Trendplots are are shown in the bottom of View 1 (opening screen) . Number of Plots The number of Trendplots displayed depends on the number of rows visible in the Results tab or Measurements tab . For example, if the number of rows is se...

The Reading and Edit Measurement tab is available in View 3 (grid view) . The screen displays the trending information of the measurement position. Reading Tab The data in the TrendPlot tab is shown in the grid. Example: In the grid, the...

The S-IDAP Details Page header includes several additional functions. Below is an explanation of each function: Header Functions Measurement Set Configurator Clicking this button opens the configuration measurement set page in the Equipment ...

With this option you can Approve the selected Circuit’s Calculation Summary.

Mike West and Jeff Harrison: “Bayesian Forecasting and Dynamic Models”, Springer ISBN 0-387-94725-6.

The formulas of the DLM are described below. Example DLM Metric In this example the following data will be used: In this example, every year a reading is taken but that’s not necessary, the algorithm works also for other time intervals. Let’...