During a surface check of Statoil's gas processing plant in August at Kårstø near the Norwegian city of Stavanger, something very wrong was discovered just beneath the surface. Or, more correctly, on the surface.
In one spot on the tank which holds propane gas under a pressure of 15-16 bars, the wall was just two millimeters thick. Extensive rust damage had corroded the wall far below the 22 millimeter thickness it should be.
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