Dr. Jens P. Tronskar M.Sc., PhD, CEng, SenMWeldI, IWE, FSWS obtained his M.Sc. degree in Materials’ Physics and Physical Metallurgy from the Technical University of Norway (NTH) and was conferred Doctor of Philosophy (PhD) in Applied Fracture Mechanics by the National University (NUS) of Singapore. Dr. Tronskar is a certified International Welding Engineer (IWE), a senior member of The Welding Institute and a UK‐Engineering Council Charted Engineer (C.Eng.). He was elected Fellow of Singapore Welding Society (FSWS) in 2015. Presently he is Senior Vice President and Chief Technology Officer for DNV GL’s Oil & Gas Technology Centre in Singapore. He has more than 35 years of experience of materials technology research, failure investigations and deterministic/ probabilistic fracture mechanics analyses/ Fitness‐For‐Service analyses of structural, piping/process components and pipelines for the offshore and onshore oil & gas industry. The experience includes deterministic and probabilistic fracture mechanics and Fitness‐For‐Purpose and Engineering Critical Assessment of welds in C‐Mn, CRA and CRA clad materials. The environmental and loading conditions have included sour service, vortex induced vibration (VIV), lateral buckling and large strain associated with pipeline reeling and lateral buckling. Dr. Tronskar has been involved in materials evaluation and testing for many North Sea field development projects since the early 80s. Since 1994 he has been based in Asia and has been involved in similar work for offshore and onshore projects in South East Asia, China, Australia and Middle East. Dr. Tronskar has been project sponsor and manager for a large number of pipeline ECAs and FFS projects. Dr. Tronskar has presented papers at international conferences in Europe, America, South America, Australia and Asia. He has published more than 70 journal articles and peer reviewed conference papers on materials technology, welding and deterministic and probabilistic fracture mechanics analyses.
Dr Shashi B. Kumar, PhD, received his Doctor of Philosophy (PhD) degree in fracture and fatigue of composite materials and adhesively bonded structures from the School of Mechanical and Aerospace Engineering (MAE), Nanyang Technological University (NTU), Singapore. Prior to his PhD degree, he received Bachelor of Technology (B. Tech.) degree in mechanical engineering from Indian Institute of Technology, Kanpur (IITK), India. He worked as research associate at IITK after receiving his B. Tech. degree, in area of Finite Element Analysis (FEA) and Non‐Destructive Testing (NDT) such as immersion ultrasonic testing (IUT) and computerized tomography (CT). Currently he is working out of Det Norske Veritas Pte. Ltd. in Singapore (DNV GL Singapore) as principal consultant and Technical Lead in Asset Integrity Solutions Section organized under Oil & Gas Technology Centre (OGTC). He has more than 10 years of experience in materials (both steel and composite material), NDT/ advanced NDT (UT/MT/PT/PA-UT/AUT), fracture mechanics, FFS assessments, ECA, welding, material testing, FEA, pipeline technology, waiver of PWHT, etc. Dr. Kumar’s group has been group leader from 2007-2011 and head of section from 2011-2012 for structural integrity solutions section, responsible to provide various services related Fitness‐For‐Service assessment philosophy such as Engineering Critical Assessment (ECA), Fitness‐For‐Service (FFS) and Fitness‐For‐Purpose (FFP), Non‐Destructive Testing (NDT) projects related to pressure vessels, pipelines, offshore structures and ships in Asia, Pacific and Middle East division for DNV GL. Dr. Kumar has published his research contributions in more than ten (10) articles in peer‐reviewed journals on mechanics of materials, pipeline defect assessments (PDA), Engineering Critical Assessments (ECA) etc. and presented in more than fifteen (15) international conferences in Asia, Australia and the United States.
Codes for design and construction of pressure vessels, pipelines, offshore structures, bridges and buildings, process plants etc.
contain acceptance criteria that are based on workmanship standards that may be somewhat arbitrary. During the construction phase or in service, there may be situations where materials properties or observed defects do not meet the strict code requirements. In such cases a Fitness‐For‐Service assessment can be applied. Such an approach is nowadays becoming accepted by many codes as it is recognized that the requirements or acceptance criteria inherent in the codes may be unnecessarily conservative. Using this alternative approach it can be shown that the structure or component can be acceptable if the conditions for failure are not reached within its service life. There are many possible damage or degradation mechanisms which must be considered. These include brittle and ductile fracture, fatigue, environmental assisted cracking and creep at higher temperatures.
There are now several publications and recommended practices available that describe the Fitness‐For‐Service and ECA approaches.
- British Standard, BS 7910: 2013 "Guide on the methods for assessing the acceptability of flaws in metallic structures".
- API 579‐1/ ASME FFS‐1 “Fitness‐For‐Service” June 2016
- DNV GL Recommended Practice F‐101 “Corroded Pipe” May 2017
- DNV GL Recommended Practice F‐108 “ October 2017
- DNV GL ST F‐101 “Submarine Pipeline Systems” October 2017.
DNV GL has developed a course programme focusing on the practical application of Fitness‐For‐Service and ECA particularly for pipelines and structures. The course also covers a brief introduction of finite element analysis (FEA) to determine the stress and strain input to the analysis and covers advanced flaw modelling and J‐integral analysis to derive the crack driving force and limit loads. It is intended that the participants attending this course shall become confident in performing Option 1 and 2 analyses according to BS 7910: 2013 and that they also will be introduced to Option 3, which uses numerical analysis to generate a FAD and ductile tearing assessments.
The course will cover the theoretical background for elastic and elastic plastic fracture mechanics and the fracture assessment diagram (FAD) methods, fatigue crack growth and tearing analysis. Further the course will also give insight into the practical aspects of elastic‐ plastic fracture toughness (CTOD, J) testing of weldments and the requirements to non‐destructive testing for flaw sizing and development of alternative flaw acceptance criteria for pipeline installation. The first three days (Days 1‐3) of the course also covers applications involving high strain due to lateral buckling, reeling installation and high temperatures in clad pipelines and effect of fatigue loading due to vortex induced vibration (VIV) associated with free spans.
Who should attend?
The course is aimed at welding and inspection, structural, mechanical, construction, design and maintenance engineers requiring more knowledge of the application of fitness‐for‐purpose assessment methods for structures, piping/ pipelines and pressure vessels.
We can also conduct a customized in house training course (IHT) and present it at your office as required.
Kindly note that seats are limited and early registration would be appreciated. As a corporate scheme, 3 or more candidates from the same company would be entitled to discount of 25% as a group rebate.