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    Stochastic modelling of perfect inspection and repair actions for leak-failure prone internal corroded pipelines

    237496_237496a.pdf (1.115Mb)
    Access Status
    Open access
    Authors
    Ossai, C.
    Boswell, Brian
    Davies, I.
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Ossai, C. and Boswell, B. and Davies, I. 2016. Stochastic modelling of perfect inspection and repair actions for leak-failure prone internal corroded pipelines. Engineering Failure Analysis. 60: pp. 40-56.
    Source Title
    Engineering Failure Analysis
    DOI
    10.1016/j.engfailanal.2015.11.030
    ISSN
    1350-6307
    School
    Department of Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/42549
    Collection
    • Curtin Research Publications
    Abstract

    To enhance the performance of any facility, reduce cost and failure probability involves proper inspection and repair decisions. To be able to establish the cost of repair and inspection of corroded pipelines at different stages of the corrosion defect depth growth, Markov modelling technique was adopted. This model formulated an inspection and repair technique, which has the potentials of aiding policy makers in maintenance management of internally corroded pipelines. The transition states were determined using the Remaining Useful Life (RUL) of the pipelines whilst Weibull distribution was used for calculating the corrosion wastage rates at the lifecycle transition phases. Monte Carlo simulation and degradation models were applied for determining future corrosion defect depth growth, in a bid to establish periodic inspection and repair procedures and their costs. Data from an onshore pipeline inspected with Magnetic Flux Leakage (MFL) in-Line-Inspection (ILI) technique was used to test the validity of the model. The results obtained indicate that the model has practical applications for inspection and repairs of aged-internally corroded pipelines.

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