A study on the reliability assessment methodology for pipelines with active corrosion defects

Markov chain modelling for time evolution of internal pitting corrosion distribution of oil and gas pipelines

“…If the deterministic corroded pit growth in this work is assumed to follow a linear random model which have been used by researchers to model different kinds of physical systems including pipelines deterioration [26,[35][36][37][38], then the progression of the deterministic pit depth ( ( )) will be of the form shown in Equation (23).…”

A comprehensive framework for evaluation of piping reliability due to erosion–corrosion for risk-informed inservice inspection

“…However, after the corrosion rates have been established, the rest of the approach can be applied to other corrosion mechanisms in a similar way. Since First Order Reliability Method (FORM) is being widely used in Structural Reliability Analysis problems, the authors also propose the same approach [2]. After estimating the base failure probability, Markov approach has been employed as suggested by Fleming et al [3 -5].…”

“…For this case, a different limit state function needs to be formulated. The third limit state function is defined as difference between pipe line failure pressure P f and pipeline operating pressure P op [2].…”

“…For the scope of this paper, two models namely modified B31G and Shell 92 are addressed. According to modified B31G model, P f is defined as [2]: According to Shell-92, the failure pressure can be defined as [2]: For this case, the depth of corrosion is defined as…”

Research of Pipeline Pressure Based on the Reliability Theory

“…Therefore, according to the reliability Corresponding author: Lihang Wang, master's degree, research fields: reliability and safety analysis of oil and gas pipeline. theory, to calculate the operating pressure of the pipeline is more reasonable, and can improve the transmission pressure and pipeline transport efficiency [3].…”