Defining CL Boundaries, Process and Potential DMs

After you have created the Corrosion Loop the CL must be further defined in the CL Details Page. To define the CL, gather and capture the information needed to define the CL Boundaries (see Corrosion Loops (CLs) - Theory), the CL process, and the CL’s Degradation Mechanisms. Do this in the different CL sections.

To define the CL:

• Open the CL Details Page (see IMS Details Page).
• As a minimum, add descriptions to the following sections:
  • Loop Description: Obtain input from Operations and the Process Engineer to detail the physical beginning and end of the loop and the Equipment/piping in the loop).
  • Process Description: Obtain input from Operations and the Process Engineer, or the Technologist to detail the relevant process conditions for degradation under normal and incidental operating modes, including historical operating modes. Include process steps and degradation precursors.
  • Corrosion Description: Obtain input from the Materials and Corrosion Engineer (MCE) to detail the expected and observed (i.e., inspection history) degradation phenomena (e.g., applied material, CRs, etc.) under all foreseeable conditions. This section should explain the relevance of the mechanisms to this CL, give input for the IOW and specify most likely inspection locations in this CL. Specific (degradation related) recommendations can be included here.
• Additionally, you can also use the following sections:
  • Potential Degradation Mechanisms: Information on expected or possible DMs that affect the CL can be captured here.
  • Operations History: A detailed description of historic operational data can be given here. Any unit upset or issues can be captured in this area to help determine any accelerated CR or any other DM that might have been trigger during abnormal operating conditions.
  • Degradation History: Information on significant inspections or events such as corrosion found, leaks, temporary leak repairs and repairs performed in this loop can be captured here.
• The last sections can be used as follows:
  • Recommendations: During the RBI workshop and Corrosion Loop review, valuable recommendations are often suggested by the team. Capture them here. For instance, additional actions or special considerations, such as start-up, shutdown, and inspection considerations (e.g. specific NDE examinations).
  • Documents: This section provides the possibility to refer to additional information / documents related to the Corrosion Loop. For new documents, a revision number, description, and document date can be set (see top section). Note: This section only refers to documents, they will not be imported.
  • Attachments: Add relevant attachments, e.g. Marked up Corrosion Loop P&IDs, Drawings, PDF documents, images, etc. here. For more options on how to add annotate Attachments see IMS Details Page.

Capture the information needed to define the CL Boundaries, the CL process, and the CL’s potential DMs in the different CL sections. 

CL sections for Recommendations, Documents and Attachments.

 

Rich Text Default

IMS offers the possibility to define and use rich text defaults for several of the above sections on the CL Details Page. For more information see IMS Details Page.

Defining the DMs

When done you can start Defining Degradation Mechanisms.

Defining Barriers

To define the Barriers see Defining Barriers (and linking to IOWs).

Assign Components to the CL

To assign Components to the CL see Assigning Components to CLs.