In "Recommended Practice for LNG Aboveground Storage" and "Recommended Practice fo LNG Inground Storage", the allowable compressive stress of knuckle plate is linked to the allowable tensile stress. According to the change of the safety factor of allowable tensile stress in ASME Boiler and Pressure Vessel Code, the safety factor in these Practice has been restudied. In connection with the restudying, the integrity of the knuckle plate is investigated.
