Continuous integrity evaluation of corroded pipelines using complemented FEA results – Part II: Procedure application

• Published in: The International journal of pressure vessels and piping 2017-02, Vol.150, p.33-51
• Main Authors: Varga, László, Fekete, Gábor
• Format: Article
• Language: English
• Subjects: Continuous integrity assessment diagram (CIAD); Corrosion defect orientation and location; Finite element (FE) serial calculation; Load carrying capacity (LCC); Verification; Virtual transitional section (VTS)
• ISSN: 0308-0161; 1879-3541
• DOI: 10.1016/j.ijpvp.2016.12.011

The general objective of this paper is to execute the continuous integrity evaluation of corroded pipelines with the developed procedure has been presented in the Part I. This aim was performed with a large dataset of complemented finite element analysis (FEA) results and burst test values can be found in the References. The numerical investigations have been done with an assumed sample-case taking spherical and spheroid shaped characteristic and mobile defects into account. The most important achievements are the supplemented ductile failure analysis, the continuous suitability of the weak link, the strain-based design criteria and the continuous integrity assessment diagrams. •Finite Element Analysis (FEA) examinations are performed for selection of a sample-case to investigate corrosion defects.•Serial calculations are carried out to determine the continuous suitability of the corroded pipeline sections.•We investigate the shape and size effects of corrosion defects on load carrying capacities (LCCs) of defective pipelines.•Continuous integrity assessment diagram (CIAD) showing the decreasing competent LCCs in the operation time is introduced.•Verification of the proposed method is performed by comparing the FEA results with burst pressure values measured.