Hydrogen Blistering Inspection with Phased Array

Hydrogen blistering usually occurs in ‘sour’ systems where oil or gas contain large amounts of hydrogen sulphide. At high temperature when hydrogen atoms diffuse into the steel, hydrogen molecules then form an internal defects or inclusions that usually migrate to become a small delamination. Over time, this can form voids or ‘blisters’ which may eventually generate enough pressure to rupture the metal.

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Inspecting using Phased Array L-SCAN gives an unambiguous means of detecting regions of hydrogen blistering.

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