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Tanker Technology The benefits, according to ABS, are many and include: • reduced risk of structural failure, • safer, longer-lived tanker struc- tures, • lower life cycle maintenance and repair costs, • more effective use of steel. Final Report Upon completion of the survey and analysis work a final report is issued, including: a summary of gen- eral findings and facts noted during the condition survey of the vessel's hull, machinery and equipment as defined in the work plan; a detailed list of all structural and mechanical components surveyed with their corresponding rating and related written description in conjunction with photographs; results from the SafeHull Structural Evaluation ad- dressing the current vessel condi- tion of the tanker with regard to strength, fatigue and buckling; iden- tification of critical areas in con- junction with the current condition of the tanker and the projected char- acteristics of these areas for the period of interest as defined by the client; and recommendations for present and future structural en- hancements for consideration by the owner to ensure continued service- ability and the hull structure. For additional information on the applications of the SafeHull System for both newbuilds and existing ves- sels, from ABS, Circle 5 on Reader Service Card New Sulzer Diesel Ltd PO Box 414 CH-8401 Winterthur Switzerland Telephone: (052) 262 49 £ Telex: 896 659 NSDL CH Telefax: (052) 212 49 17 Sulzer Diese The restated criteria in the guides will also include design criteria to assist the designer in the selection of initial design scantlings, which will be checked against the evalua- tion criteria, and can allow for a more streamlined ABS review pro- cess and a more rapid means for exploring innovative designs while maintaining safety and efficiency. SafeHull: Its Application For Existing Vessels As originally envisioned, the fo- cus of SafeHull was for new vessels. However, during the product's de- velopment ABS clearly recognized its potential value for existing tank- ers. This led to, at the beginning of this year, the introduction of the SafeHull System for use with exist- ing tankers. Called ABS SafeHull Condition Assessment Services, it can apply advanced, dynamic-based structural evaluation criteria to assess corro- sion and fatigue on the strength of a tanker structure. Utilizing this information, criti- cal areas can be identified and solu- tions regarding structural enhance- ment can be made. Administered by the affiliate ABS Services Inc. (ABS MS), the Assess- ment Service offers two packages. One package comprises three el- ements—Condition Assessment Survey, Verification of Gaugings and Structural Evaluation and Rec- ommendations. The second package focuses on the third element, which is based on SafeHull technology. In the Condition Assessment Sur- vey, an ABS survey team conducts a survey to assess the condition of the vessel's hull structure, machinery, piping, electrical systems, boilers and accommodations. The survey also examines the extent of steel wastage, as well as the condition of coating and corro- sion systems. To correctly gauge global and lo- cal hull strength, accurate thick- ness measurements are necessary. Once completed and accepted by ABS, the information is utilized in the SafeHull Structural Evaluation. Using vessel gauging informa- tion, the SafeHull evaluation is con- ducted based on a comparison of its "as built" condition with up-to-date gaugings utilizing the same state- of-the-art ABS SafeHull criteria as that used for new vessel design. Buckling, strength, ultimate strength and fatigue assessments are included in the evaluation. Dependable power for your ships May, 1994 Circle 242 on Reader Service Card New Sulzer Diesel US I 200 Park Avenue New York, NY 10166-0068 Telephone: (212) 949-0700 Telex: 496 16147 NSD NEW YORK Fax: (212) 949-0871 RTA-series low-speed engines 1480-48600 kW ZA40S medium-speed engines 3600-12960 kW S20 medium-speed engines 420-1440 kW
