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| View Original: | Wet magnetic particle testing on a pipeline.jpg (2324x1624) | |||
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| Keywords: Wet magnetic particle testing on a pipeline.jpg A technician performs magnetic-particle inspection MPI on a pipeline to check for stress corrosion cracking The technique used here involves black particles in a wet suspension sprayed onto a surface prepared with white contrast paint a technique known in the trade as black and white MPI In the left picture the technician is holding a magnetic yoke horseshoe-type electromagnet against the pipe while spraying the liquid onto the magnetized area between the poles In the right picture the technician watches the liquid flow while checking for indications of cracking which would appear as small black lines No indications of cracking appear in this picture; the only marks are the 'footprints' of the magnetic yoke and drip marks In these pictures the pipe is sitting on a steel support in a shop after being removed from service for testing own original text self-made 1 2012-07-10 Davidmack wikipedia en <br/> Licensed under the GFDL by the author; Released under the GNU Free Documentation License Cc-zero GFDL Original upload log en wikipedia Wet_magnetic_particle_testing_on_a_pipeline jpg wikitable - 2012-07-10 16 57 2324×1624× 596586 bytes Davidmack A technician performs magnetic-particle inspection MPI on a pipeline to check for stress corrosion cracking The technique used here involves black particles in a wet suspension sprayed onto Pipelines Men at work Inspection equipment | ||||
