Note: To view categories like Release Notes, Site-Specific Documents, and Recommended Practices, click Login in the top-right corner. If you don’t have a login, sign up with your work email.

Software Step 6

  • Updated on Mar 3, 2025
  • Published on Jan 30, 2025
  • 2 minute(s) read
  • Denis Tkalec
  • Tomislav Renic
  • Elsa Tolsma

 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. For For creep and low cycle fatigue the Remnant Life assessment will be required but Selected Corrosion Rates (SCR) will not be applicable.
  • 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 IFLining/Coating. From this the MIILining/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 IFLining/Coating will be adjusted and the MII will be shortened.
  • Fill in the other data.
  • Click Save when done.