Software Step 6

Updated on 09 Aug 2024
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Step 6 Estimate Remaining Functional Life (AR DMs and CUI):

Below is explained how to implement Step 6 in the Software. See also Methodology Step 6 .

Determine the Remnant Life

Note: For Tank Equipment, the Calculator tab is used for the Load Case 1 calculations. Specific specs and general data are required for the calculations.

To determine the RL:

Select the Remnant Life tab in the left section.
Click Edit.

Select the Remnant Life tab.

Review the Corrosion data:
- If you have set the Component to inherit from a Circuit in Step 1, the Actual CR (this is the Governing Rate) and Actual RCA from the Circuit’s driving CML will be shown here. Note: Inheritance can be set on either the Component or Circuit details page - see Step 1.
- Click Open to see the Equipment overview (incl. the inherit Circuit).
Select a Corrosion Type. Note: For most Equipment, this is only for information purposes. This is only used for Tank Equipment.
Specify the RCA: Either select the actual RCA by clicking the arrow, or manually enter a different value. Refer to Methodology Step 6. Note: For CUI-CS, you can specify the Design Corrosion Allowance (DCA) or Remaining Corrosion Allowance (RCA) here. Not applicable for CUI-SS.
Specify the SCR: Either select the actual CR (this is the driving CML’s Governing Rate) by clicking the arrow, or manually enter a different value. Refer to Methodology Step 6. Note: For CUI-CS, you can specify the Estimated Corrosion Rate (ECR) or the Measured External CR (MCR) here. This is not applicable for CUI-SS.
A Legal/local interval can be specified, and an additional Explanation can also be added.
Click Save when done.

Take Credit for Lining or Coating Life

To take credit for Lining or Coating Life:

Select the Lining/Coating tab in the left section.

To take credit for Lining/Coating, select the Lining/Coating tab.

If Lining/Coating is present, the associated specs should be filled in for the Component. See Step 1. This information will then be available here.
Click Edit.
Click Questionnaire and fill in the questions to determine the Lining/Coating Quality. Note: The quality is used to determine the IF_{Lining/Coating}. From this the MII_{Lining/Coating} is determined, which will extend the NID (see Step 11).

Important

The quality score must be determined for the Equipment NOT for the DM.

If this is the first time that you are filling in this tab: Select the Lining/Coating Cond. Last Insp based on the condition at the Lining/Coating Install Date.

Important

At first Lining/Coating Cond. Last Insp should NOT reflect the condition at the last inspection, but at the Install Date.

If an inspection has already been completed for the Lining/Coating, then go to the Inspection History tab: At the last inspection date, selected a value for the Lining/Coating Condition (see Step 5). Thereafter this condition will be updated here in the Lining/Coating Cond. Last Insp. Note: If the Condition is not “Good” the IF_{Lining/Coating} will be adjusted and the MII will be shortened.

Fill in the other data.
Click Save when done.

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What's Next

Step 7 Determine Susceptibility to Failure

Table of contents

Determine the Remnant Life
Take Credit for Lining or Coating Life