Crack detection tools

Kiefner, J. F., Hyatt, R. W. and Eiber, R. J., Metal Loss, Crack Detection Tools Targeted , ibid., 69-71, 24 April (1989)... 

Crack detection tools are typically designed for longitudinal crack detection, but they can also be adapted to circumferential crack detection. 

UT crack detection tool generates an ultrasonic signal into the pipe wall that is reflected off the internal and outer surfaces of the pipe. If a crack is detected, the signal reflects back along the same path of the tool. Since a liquid couplant is required between the sensors and the pipe wall, this tool works only with liquid pipelines. 

The measurement applications of density weighted drying profiles, water ingress, water phase transitions, crack detection, chlorine, sodium and lithium imaging applied to cement-based materials can be easily translated to other porous media. Density weighted MRI will no doubt prove to be a powerful tool in material science research. 

This technique is also known as scanning acoustic tomography. This is a powerful tool for spotting delaminations, cracks, and other anomalies non-destructively. Not only does acoustic microscopy detect the failures but it can also provide the specific location of the problem. SAM high-resolution images and advanced diagnostic tools are used to ... 

Additionally we may conclude that low-pressure integral permeability is a quick and easy to use tool for crack (defect) detection and leads to detailed structural characterization of asymmetric membranes. Furthermore, permeability experiments give a rough but reliable measure of the maximum pore size of the structure under study. 

Transverse MFL tools magnetize the pipe wall around its circumference to detect cracks, such as longitudinal seams cracks and longitudinal seam corrosion. This tool is similar to... 

Electromagnetic acoustic tools are particularly adapted to the detection of cracks in dry gas pipelines. This tool generates ultrasonic signals without requiring liquid couplant to transfer the ultrasound into the steel. These tools are new to the pipeline inspection industry, so their effectiveness has not yet been determined. 

December 1956-January 1957 Removal of typical flanges for metallographic examination to detect possible stress-corrosion cracks. Further tests of remote-maintenance tools... 

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