FIELD: oil and gas industry.
SUBSTANCE: at first a crack in the outer layer of double-layer tank is detected and welded. Then an opening is made in the outer layer of the tank through which slurry is fed under pressure between the layers of the tank. The slurry leaks through the cracks in the inner layer and paints the surface of the cracks.
EFFECT: increased efficiency of crack detection in the inner layers of double-layer tanks.
1 dwg
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