In September 2011, SGS is offering in Singapore and Malaysia two free seminars introducing a variety of Advanced Ultrasonic Testing techniques that form an important element in the SGS portfolio of Non-Destructive Testing (NDT).

The half-day seminar on September 6, 2011 is in Singapore, where SGS expert Norbert Trimborn provides an overview of Time of Flight Diffraction (ToFD), Guided Wave, and Phased Array techniques.

Two days later, on September 8, 2011, SGS offers a further and more in-depth seminar in Malaysia, this time lasting a full day. Again featuring presentations by Norbert Trimborn, this free seminar offers more time for practical demonstrations and discussion, as well as an introduction to the related topics of Asset Integrity Management (AIM), an overview of Risk-Based Inspection, and Corrosion Monitoring.

Participants will have an excellent opportunity to meet national and international experts, profit from their knowledge, and learn about experiences gathered around a whole spectrum of innovative testing methods used in a variety of applications, industries, and geographical regions.

About Advanced Ultrasonic Testing

Ultrasonic Testing uses high-frequency sound waves to detect and identify flaws, and it may be applied to measure the remaining thickness of materials that are subjected to corrosion. Ultrasonic Testing equipment works on the principle of sending a pulsed beam of ultrasound from a transducer, which is placed on the surface of the object being tested. This wave will be reflected by any imperfection or from the back of the material’s wall that is subjected to corrosion. Capturing and analyzing the return sound collects useful information, which is displayed on the screen of the ultrasonic inspection equipment. The ultrasonic testing may be applied manually with one single handheld probe or mounted in a motorized, encoded manipulator to test the object. Multiple probes can be applied as well in the scanners.

Time of Flight Diffraction (ToFD) has established itself as a widely used tool for the detection and sizing of flaws in welds and is now seen as the most accurate and effective NDT technique in determining such defects. ToFD can be used for pre-service and in-service inspection of several objects. It is applied on fine-grained coarse materials to detect flaws, and it shows excellent capabilities to size the defects by using the diffraction waves generated by them. With the existing acceptance criteria worldwide, such as ASME and EN, it makes the inspection easy and fast to apply. Thin materials, as well as heavy wall thickness objects, can be inspected in one single run. ToFD generates a permanent record which may create a basis for future in-service inspections as well.

In contrast to spot measurement techniques, the Guided Wave technique screens 100% of the volume of the piping inspected for metal loss features, such as corrosion and erosion. The Guided Waves application generates waveforms in both directions of the pipe, and is therefore an inspection technique which can inspect lots of meters in both directions. If there is corrosion present in an object, it will reflect this waveform and generate a signal. However, the piping lays on supports and has lots of welds; both are creating reflections as well, the software is capable to distinguish relevant indications from non-relevant. The technique will be used as a fast screening tool for corrosion detection. The piping can be in operation, insulated, and even buried.

Another technique introduced is Phased Array, which is an advanced method of Ultrasonic Testing. Phased Arrays are generated by using several elements in the same transducer, which allows beam steering and different depth focalizations in materials. It can be used as a standalone technique or even in a combination with others. Applications are in the in-service inspections, as well as the pre-service examinations. With Phased Array, multiples zones of interest can be examined with one single probe. If there are geometrical limitations, a Phased Array can inspect areas of interest which are not possible to inspection with conventional probes. The Phased Array configuration can be adapted in such a way that coarse-grained materials are to be inspected as well.

About SGS Industrial Services

SGS Industrial Services is one of the major business lines of the SGS Group, a global service provider for technical verification, inspection, testing, and conformity assessment. SGS has a worldwide track record with proven performance on new construction, pipeline installation, in-service inspection, and expansion projects, such as the total Non-Destructive Testing solution provider.

SGS continuously develops its services and applications. SGS Non-Destructive Testing Services are not only integrated with our Asset Integrity Management, but also with our Material Testing Laboratories, and they seamlessly fit into our Supply Chain Services. The services are packaged around your assets and production processes and can be utilized whenever required.

SGS experts share their knowledge and experience with clients offering a complete suite of NDT training courses based on SGS network around the world suitable to customer needs also at company locations finding individual testing solutions for companies individual needs.

For more information about NDT services, or to register for the above seminars, please contact:

SGS Industrial Services
Jiyoung Yoon
Business Assistant Global NDT

SGS Nederland B.V.
Industrial Services
Malledijk 18

t: +31 181 693 612
f: +31 181 693 585


SGS is the world’s leading inspection, verification, testing and certification company. SGS is recognized as the global benchmark for quality and integrity. With more than 67,000 employees, SGS operates a network of over 1,250 offices and laboratories around the world.