·Table of Contents
·Methods and Instrumentation
Documented remaining wall thickness with ultrasonics, quickly and intelligently
Author : Roland Kierspel, Krautkrämer GmbH & Co. oHG, Germany
Co-Author : Winfried Roggendorf, Krautkrämer GmbH & Co. oHG, Germany
Heiko Witte, Ingenieurbüro Witte, Germany
Practical examples taken from industry for corrosion and erosion testing on containers and pipelines. State of the art application software offer many possibilities for such thickness measurements and enable data processing and documentation to be made effectively, easily and economically. Measurement readings can be statistically evaluated according to different criteria and analysed over a long period; different graphic presentations are available for evaluated data.
The conditions for this advance were achieved by improved measurement technology and the further development of processor technology, e.g.:
- Different measurement and evaluation methods with through-layer measurement with simultaneous display of layer and tube wall thickness.
- Patented measurement of wall thickness with unknown sound velocity without having to produce reference pieces.
- Measurements at high temperatures with special couplants and coupling monitor capability to avoid misinterpretation of the measurement.
- Minimum value measurement for automatic recording of the minimum thickness within a rapid measurement set.
- Graphical B-scan presentation, e.g. inner side of the tube with critical wall thickness measurements.
- Use of different probes in order to optimize the test (frequency, element diameter, temperature range, probe type and dialog capability, surface condition of the test object).
- Bar code reader for automatic allocation of the measurement reading of the required location for documentation.