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Abstract : |
Major causes of pipeline leakage are corrosion (internal or external), or mechanical failure attributed to stress corrosion cracking (SCC) and fracture. Leak arrival process can be modelled as either power intensity process or log linear intensity process. In this paper generalized models of long run expected cost of pipeline operation are proposed. These models can be used to forecast the average cost of operation in a given planning horizon, they can also be used in a variety of economic decision making processes such as economic tradeoff of installing a cathodic protection system, replacement versus continuing the maintenance, as well as they can become the basis of selecting among various technical alternatives. These models and decision rules are developed for both power intensity and loglinear intensity processes. The solution of the models are given in terms of nondimensional variables and cost parameters., |
