What is Thickness Inspection Optimization (TIO)
Mechanical integrity programs are reliant on the validity of the extensive data that is captured and analyzed through equipment inspection plans. This data is used to predict necessary repairs and replacements, measure corrosion rates, schedule future inspections, and identify circuits where more thorough inspection is necessary. As more and more data is collected and stored in a facility’s IDMS program, the asset-owner has an opportunity to harness that information and optimize the facility’s inspection activities. Over-inspection of assets that are not exposed to corrosive process conditions is an inefficient use of inspection spend. On the contrary, under-inspection of assets that are expected to experience high corrosion rates increases operating risk.
TIO Service Offerings
- IDMS Health Check
Becht a list of health check metrics to identify problematic areas of a client IDMS that should be cleaned up prior to an TIO analysis. Using a data export of the IDMS system, Becht will develop a report detailing the findings of the health check assessment and provide measurements against Becht metrics, including recommendations to resolve the identified gaps. Select examples include assets without required inspection tasks, CMLs beyond retirement life, or equipment with nominal thickness less than t-min. Becht can also assist with execution of gap closure efforts. An IDMS Health Check can benefit an inspection program at any maturity.
- Targeted Optimization paired with SME Review
This effort analyzes an IDMS dataset to identify and optimize the subset of operating equipment being over-inspected where damage is not likely and the equipment being under-inspected where damage is expected. Analysis of the damage mechanism susceptibility, equipment metallurgy, CML count, and SME input are used to review and optimize the ~20% of equipment in a unit that has the highest opportunity for optimization. Targeted Optimization pairs well inspection programs that have damage mechanisms assigned to assets/piping and field data available beyond baseline thickness.
- Statistical Analysis and Full Quantitative Optimization
An advanced statistical analysis of unit NDE data to identify opportunities for inspection optimization. Statistical methods include distribution analysis, cumulative probability plot, and outlier analysis. This assessment requires the highest quality IDMS data but provides the most thorough reporting of damage-likely assets and opportunities for reduction of inspection activities. Quantitative Optimization can benefit all types of inspection programs including fixed-interval, condition-focused, or RBI-driven.
CML Placement Services
Upon completing any level of optimization, Becht can assist clients in capturing value from identified opportunities by using Inspection SMEs to review identified isometrics and optimize inspection locations and techniques (CMLs). Becht also has IDMS expertise and drafting resources to execute associated data loading and CAD revision efforts, if desired.