Page 125 - Reliability and Maintainability of In service Pipelines
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Determination of at  least two corrosion depth measures with in  time of service  Identifying the  threshold,(a 0 )  data.  depth corrosion








                                                               of availability



                           Identify the time variant formulation of the degradation  process (Eq. 4.15)  Parameter approximation by using one of the methods (MLE or method of moments), to find shape parameter α and scale parameter λ) by using Eqs. (4.17 & 4.18) or (4.20 & 4.21)  Calculation of probability  of failure, (Eq. 4.14)  of  case  th














                                                        Sensitivity analysis  (GDD) degradation distributed









                                                               Gamma



                                                               4.3
                                                               Figure
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