September 2021, Vol. 248, No. 9


Increased Safety for Natural Gas Pipelines

By Andreas Thieme, Dillinger  Local hard zones, also called hard spots, are small areas (only a few tenths of a millimeter in thickness) on the surface of steel plates.   Dillinger's eddy current testing system. Photo: Dillinger Formed on pipes transporting sour natural gas, local hard zones can cause sudden stress corrosion cracking in the through thickness direction. To detect and eliminate these local hard zones reliably during plate production, Dillinger, Europe's leading heavy plate manufacturer, developed a special eddy current testing system.  This method is now recognized by various oil and gas companies. First, pipes made of D-TECT-b

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