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Technical Evening- ADVANCED ENGINEERING CRITICAL ASSESSMENT IN STRUCTURAL INTEGRITY MANAGEMENT – 19 of June – FREE!
June 19, 2018 @ 4:15 pm - 5:30 pmFree
ADVANCED ENGINEERING CRITICAL ASSESSMENT IN STRUCTURAL INTEGRITY MANAGEMENT
Assessing crack-like defects is one of the key components in structural integrity management for pipelines and for general onshore/offshore facilities. Typically, the criticality of the crack-like defect is assessed through application of Engineering Critical Assessment (ECA). Conventionally, this assessment is carried out based on the Failure Assessment Diagram (FAD) approach using guidelines in standards such BS7910 or API579.
The use of FAD-based approach was originally standardized for nuclear power plant and then extended into applications in oil and gas industry. The approach is semi-analytical and has very low computational cost, which make it attractive in the oil and gas industry. The FAD-based approach itself is essentially stress-based and has been proved to be overly conservative past pipeline projects. However, application of this approach for a strain based design is still questionable (for both conservatisms and non-conservatisms) and needs justification as well as modifications.
This presentation presents two state-of-the-art developments for ECA, namely Probabilistic ECA (PECA) and Strain-Based ECA (SBECA). Both developments target more accurate assessment of the criticality to enable relaxation of unnecessary design or installation conditions. PECA is an effort to reduce the unnecessary conservatisms due to a very low joint probability of occurrence of bounding values for key parameters. Meanwhile, SBECA is an effort to utilize the strain hardening regime of material more accurately. Discussions on how these two advanced ECA frameworks can be applied in phases of a project and associate cost-effectiveness will also be presented.
Brief bio of the presenter:
Dr. Joe Tran is a Senior Engineering Specialist at INTECSEA Perth Office. He has more than ten years of experience in Finite Element Analysis (FEA), specialized in fatigue, damage/failure analysis and fracture mechanics. He has a solid background in fracture mechanics and FEA and significant working experience in Engineering Critical Assessment (ECA) as well as in Fitness-for-Service (FFS) studies.
He has performed ECA and FFS for subsea pipelines, ranging from C-Mn pipes to CRA Clad/Lined pipes, and onshore facilities, such as storage tank and fittings, using various techniques, from using analytical solution approach to developing three-dimensional fracture mechanics-based numerical model. Additionally, Joe has performed probabilistic approach for various ECA and FFS projects.
Additionally, he is hosting a JIP on strain based ECA, which is participated by operators, installation contractors and standard writer. He is also developing the PECA framework for an operator.