The reliability estimation of buried pipeline with corrosion defects is presented. The reliability of corroded pipeline has been estimated by using a theory of probability of failure. And the reliability has been analyzed in accordance with a target safety level. The probability of failure is calculated using the FORM (first order reliability method). The changes in probability of failure corresponding to three corrosion models and eight failure pressure models are systematically investigated in detail. It is highly suggested that the plant designer should select appropriate operating conditions and design parameters and analyze the reliability of buried pipeline with corrosion defects according to the probability of failure and a required target safety level. The normalized margin is defined and estimated accordingly. Furthermore, the normalized margin is used to predict the failure probability using the fitting lines between failure probability and normalized margin.
[1]
Rehan Sadiq,et al.
Probabilistic risk analysis of corrosion associated failures in cast iron water mains
,
2004,
Reliab. Eng. Syst. Saf..
[2]
M. Ahammed,et al.
Probabilistic estimation of remaining life of a pipeline in the presence of active corrosion defects
,
1998
.
[3]
Robert E. Melchers,et al.
Structural Reliability: Analysis and Prediction
,
1987
.
[4]
Robert E. Melchers,et al.
Probabilistic analysis of underground pipelines subject to combined stresses and corrosion
,
1997
.
[5]
U-Sik Kim,et al.
The Evaluation of Burst Pressure for Corroded Pipeline by Full Scale Burst Test
,
2002
.
[6]
Achintya Haldar,et al.
Reliability Assessment Using Stochastic Finite Element Analysis
,
2000
.