MOL Comfort

Japanese classification society ClassNK is claiming a “world-first” breakthrough finding in the required crack arrest toughness of steel plates used in the construction of ultra-large container vessels (ULCVs).

In response to the huge increases in containership sizes over the past decade and the need to ensure their structural reliability, in January 2013  the International Association of Classification Societies (IACS) released its “Unified Requirements” for the use of extremely thick steel plates, outlining a minimum brittle crack arrest toughness value of 6,000 N/mm 3/2 ...

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  • Dave McCrae

    July 30, 2016 at 12:20 am

    We encountered this problem in 1976 in Perry Nuclear Plant Emergency Cooling Water Intake Structures. The crack initiation was traced to weld joint design, and lamellar tearing within the plate. 🙂