Abstract
This method is based on data collected during previous expertise done on similar products. The objective is to predict reservoir and tube useful life and wall thickness using a minimum of field measurements. The method was initially developed for non-destructive inspection such as radiography and ultrasound. It can be described in eight steps: 1) Assessment of degradation severity 2) Determination of inspection method 3) Initial sample size calculation 4) Field testing 5) Results analysis 6) Probability and reliability calculations 7) Useful predictions and degradation pattern 8) Results presentation. Steps 4 to 7 can be recomputed to get a better confidence index. This method is fully computerized. Calculation and results presentation are customized based on a questionnaire fill by the project engineer.
