NON-DESTRUCTIVE TESTING SOCIETY(SINGAPORE)
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EVENTS
Nanyang Technological University, Singapore Dear NDTSS Members, We are pleased to invite you to attend a technical talk on “"Thermographic NDT and its applications".
ABSTRACT OF THE TECHNICAL TALK Topic "Thermographic NDT and its applications" A brief introduction will be given describing technical issues. An overview of a thermographic camera, which has a variety of lenses for different focusing distances, will be given. The capabilities and sensitivity of the technique will be described. Its main sensitivity is to subsurface delaminations not too far from the inspection surface in non-metallic materials such as fibre reinforced composites in aircraft structures. Another application is for determining lack of adhesion between non-metallic coatings and a metallic substrate. Lack of adhesion in microelectronic components is also possible. Advantages and disadvantages of the technique compared with other NDT techniques will be presented. Some finite element and theoretical modeling to predict results will be described. Research projects by NTU final year project students and a PhD student, Dr Bai Weimin, will be presented.
Dr Stephen Wong has been a lecturer in Nanyang Technological University, Singapore for 15 1/2 years, mostly with the School of Mechanical and Production Engineering, where he presents course modules and conducts research in Non-Destructive Testing. Prior to this he worked for 11 years in the UK, conducting research and development and auditing sub-contractors in NDT. During this latter period he worked 2 years for Clarke Chapman - International Combustion Plc Ltd, a pressure vessel fabrication company and 9 years for Rolls Royce Plc Ltd, a gas turbine engine fabrication company. He has a PhD in Physics from the University of Manchester Institute of Science and Technology, UK and has published over 40 papers in various journals and conferences mainly in non-destructive testing. He is a Member of the Overseas Advisory Panel for the British Institute of NDT for Singapore and is a Technical NDT auditor for the Singapore Laboratory Accreditation Service. He has collaborated with various companies (including RSAF and GE, USA) on NDT projects for many years.
ABSTRACT OF THE TECHNICAL TALK The speaker will present an overview of the ACFM technique, covering basic principles, advantages (and disadvantages), example applications in oil and gas and other industries. He will go on to cover more recent advances in array technology and applications in the rail industry, thread inspection, and hostile environments.
ABOUT THE SPEAKER Dr Martin Lugg studied Physics at Oxford University, and then did a PhD in Astrophysics. He then took a Post-Doc Research Assistantship in 1982 at University College London, working on A.C. Potential Drop modelling under Dr. Roy Collins and Professor Dover.
Mr. A.Venkat Mr. Francis
The 5th technical talk on Advanced (Digital) Ultrasonic Flaw Detectors (UFD) was presented by Mr.A.Venkat. Mr. Francis gave a presentation on `Fundamentals of Video scope, Its applications and Current Developments´. Both Presentations effectively highlighted and demonstrated the enhanced features of modern equipments (UFD & Video scopes) that is used in wide range of industries. SPEAKER : MR. A. Venkat (Regional Manager, NDT Instruments Pte Ltd, Singapore) ABSTRACT OF THE TECHNICAL TALK Patented Color-coded display of legs for angle beam inspection (eg. welds) - for easy identification of defect location Direct sizing of defects based on DAC curves. A-Scan Compare mode to facilitate periodic inspection / before and after repair reports. A-freeze mode for foolproof inspection. Additional data logger for corrosion thickness logging Flaw location with display of all coordinates, sound path, projection distance etc Amplitude evaluation in dB referred to a previously recorded reference echo or as per AWS D1.1 In addition to the technical talk some of the latest NDT equipments will be on display. Equipments which will be on display for hands-on/demonstration are: Mike - Thickness meter with integral probe,USM35 and Alloy Analyser XMET
ABOUT THE SPEAKER Mr. Venkat has an electronics engineering degree from India and has worked in the NDT field for more than 12 years. He has worked in the middle east for 10 years serving the Petrochemical / oil/gas industries. Presently working as Regional Sales Manager with NDT Instruments Pte Ltd, he is responsible for sales of NDT products in ASEAN countries. He is also certified by Krautkramer to ASNT LEVEL II in UT to effectively sell their range of UT products.
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The 2nd Annual General Meeting (AGM) (After the Revival of the Society in 2003)
The 2nd Annual General Meeting of the Non-Destructive Testing Society was held on Friday, 30th July 2004 at the Cell Room of CDANS COUNTRY CLUB. A Technical Talk on Paint Coating was presented by Mr. Tony Chioh before the AGM and followed by dinner at CDANS restaurant. Two New members and Two Honorary Auditors of the council were elected followed by the re-election of existing members. Nine (9) Corporate Members and 114 Ordinary Members were enrolled with us as on 30th July 2004. A discount of S$5.00 was offered to the members (except corporate members) who applied for membership before the AGM on 30th July 2004 as per the executive committee meeting held on 16th June 2004. AGM 2004 AGENDA:
ABSTRACT: The speaker, Mr. Tony Chioh, has been working within the Paint industry for the past 28 years. He is a specialist in Painting & Inspection and has vast experience in the areas of painting and inspection. In this presentation, he will be sharing his vast experience and technical expertise on paints with the members of the audience. In this talk the audience will gain the basic knowledge of paints, its chemical properties and its various generics. He will be touching on the topic of corrosion & various methods of corrosion prevention. Corrosion prevention of steelwork is a tricky business and will require details and lessons on Pre-Treatment, Paint Application and right up to Inspection & Control. However not all paint jobs will be smooth sailing, thus we will need to know what kind of Paint Failures are expected and what are the potential pitfalls . The talk will end with an introduction to the latest technology within the marine industry like Anti-Fouling and Cathodic Protection
Mr Tony Chioh is an engineer by profession and completed his education in 1968. He then went on to Ngee Ann Technical College, where he had further certification on Corrosion Control and is an accredited Corrosion technician by the National Association of Corrosion Engineers. Tony then spent the next 20 years working within the coatings industry, for Major Marine companies, undertaking major projects, working with Shipyards and vessels and gathered a staggering amount of experience and exposure that few could match. Currently he is the Technical Support Manager for the Protective Department within Jotun (Singapore) Pte Ltd, handling key projects within the department
Annual General Meeting 2003
AGENDA: 1. Technical Talk 2. Financial report 3. Voting in of new Committee Members 4. Election of Honorary Auditor 5. Changes to constitution requested 6. Any Other Business 7. Refreshments
ABSTRACT: The speaker, Dr.Oruganti Prabhakar, has been working in the areas of coating thickness measurement, cast composite testing and brake lining testing at the School of Materials Engineering for the past 5 years. In this lecture some of the results obtained in the application of nondestructive testing to measure coating thickness will be presented. Superalloys are used as a turbine blade material for high temperature applications. They are usually coated with nickel aluminide intermetallics for high temperature properties. It becomes necessary to measure the thickness of the coating by some nondestructive technique. The problem is complicated by the fact that the base material and the coating are both electrically conducting. The conventional techniques like RT, UT and ET along with thermography and magnetic properties were tried out in the NDT lab at NTU to determine their sensitivity for this application. The standard specimens were provided by an industrial company in Singapore. It is found that the eddy current, magnetic properties and the thermography techniques offer the most viable methods to determine the coating thickness. In the case of magnetic properties determination, a reasonable relationship can be seen between the coercivity, remanance, flux density and energy product readings and the coating thickness. As the coating thickness increases, the magnetic properties mentioned earlier increases. Good correlation between phase angle and coating thickness was recorded when using high frequencies in the case of eddy current testing. Thermography yielded very encouraging results to determine the coating thickness. Both regular pulse thermography and lock-in thermography were employed and the results are very encouraging. A simulation of the thermography method for this coating was also carried out for different heating methods. The results showed that thermography can be a useful tool to determine the coating thickness in superalloys.
Dr.Oruganti Prabhakar obtained his B.Tech and Ph.D degrees in Metallurgical Engineering from the Indian Institute of Technology, Madras, India. He was trained in Germany in the areas of Non-Destructive Testing and Metal Casting from 1 December 1970 to July 1972. Subsequently he has also worked at Virginia Polytechnic and State University, USA (stationed at NASA, Langley, Hampton) for two years from 1980 to 1982. Presently he is working in Singapore as "Senior Fellow' in the School of Materials Engineering at NTU, Singapore, since July 1998. Formerly he was a Professor at the Department of Metallurgical Engineering at IIT, Madras. He was also the Head of the Department from 1987 to 1991. Dr.O.Prabhakar has been teaching and carrying out research in the areas of Non-Destructive Testing and Metal Casting for the past 35 years. He has guided 13 Ph.Ds, 5 M.S and 12 M.Tech projects in these areas. He has published about 50 technical papers in refereed journals and presented 42 papers in conferences. In particular, he has worked in the area of applying ultrasonic techniques for quality and damage assessment in materials. He was in charge of the Non-Destructive Testing and Metal Casting Laboratories at IIT, Madras. He was the recipient of a number of awards in India. He has conducted orientation courses for ASNT Level III examinations in India. He has extensive experience in advising and carrying out projects for industries in India in the fields of NDT, Metal casting and Industrial metallurgy.
ABSTRACT OF THE TECHNICAL TALK Carbon Steel tubes in Heat Exchangers, Boilers, Air Fin Coolers are most common in the Petrochemical Industry. Carbon Steel, an inexpensive material has good mechanical properties and heat transfer capabilities. However, it is often employed in conditions involving steam or water on one side of the tube which can be rated as one among the most corrosive environments. Over the years with shrinking maintenance budgets and longer intervals between plant shutdowns the need for reliable inspection of these units has increased. With the advent of digital processing technology several enhancements to the inspection equipment based on Remote Field Eddy Current, Magnetic Flux Leakage, Ultrasonic IRIS and Laser Optical techniques have taken place. Each of these inspection techniques has its own merits and demerits. This presentation presents a brief overview of the various techniques available for carbon steel inspection discussing their merits and demerits through various case-studies and presenting a methodology of selecting the right combination of techniques to achieve reliable inspection results. Mr. K.S.Venkataraman holds a Master's degree in Non Destructive Testing from the Brunel, University, UK. Has a total experience of 11 years in several advanced NDT inspection techniques. He initially specialized in the application of Time of Flight Diffraction technique for complex geometries and has presented several papers on the same. His current interests include the development of reliable inspection procedures and tools for Tubular Inspection as in Heat Exchangers and Air Fin Coolers and has experience in various systems based on Remote Field Eddy Current, Magnetic Flux Leakage and Ultrasonic IRIS. Also of interest is the application of Ultrasonic Guided Wave Inspection for rapid screening of plant piping. He has been with the Escon group of companies since their inception in this region in 1992 and is currently in-charge of the Special NDT group of the company.
ABSTRACT OF THE TECHNICAL TALK There are many applications of science and engineering that are advancing rapidly today as a direct result of more powerful computing hardware and consequential advances in signal processing. One of these advances has been associated with guided wave non-destructive testing (NDT) or long range ultrasonic testing (LRUT). The system described in this paper is one of the few at the forefront of long range ultrasound guided wave technology. Mr. Michael Trinidad holds a Diploma of Engineering (Non Destructive Testing) from the Advanced Materials Testing Centre, Australia. He has a total experience of 12 years in several advanced NDT inspection techniques and is certified level III by AINDT, ASNT, ASNT ACCP and RWTuV with additional API qualifications. He initially was trained in the Australian military (Army) at the NDISL (Non Destructive Inspection Laboratory as an aircraft NDI technician. After his military tenure he has been involved in several specialist NDT and inspection fields. Career highlights have been specialised training in MFL steel wire rope inspection and instigation of an Australia Standard on the method, Long Range Ultrasonic Testing and supervising construction on the current world's tallest building. He has been with the International Refinery Service's group of companies mostly since 1996 and is currently the Business Development Manager in-charge of Specialised NDT inspections.
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