ISO INTERNATIONAL STANDARD 6555 Second edition 1988-11-01 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEKAYHAPOAHA OPTAHW3ALMH NO CTAHAAPTM3ALMM Shipbuilding - Topping winches Construction navale -- Treuils d'apiquage Referencenumber ISO 6555 : 1988 (E) Not for Resale ISO 6555 : 1988 (E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISo, also take part in the work. ISo collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 6555 was prepared by Technical Committee ISO/TC 8, Shipbuilding and marine structures. This second edition cancels and replaces the first edition (ISO 6555 : 1981), of which it constitutes a minorrevision. International Organization for Standardization, 1988 C Printed in Switzerland ted without license from IHS Not for Resale INTERNATIONAL STANDARD ISO 6555 : 1988 (E) Shipbuilding -- Topping winches Scope ISO 4413 : 1979, Hydraulic fluid power -- General rules for the 1 application of equipment to transmission and control systems. This International Standard specifies requirements and characteristics of lightly powered and externally powered top- ISO 7825 : 1985, Shipbuilding - Deck machinery -- General ping winches as used in derrick cargo-handling gear. The lightly requirements. powered topping winches include winches with electric or hydraulic drive. IEC 92 : 1965 to 1988, Electrical installations in ships. IEC 529 : 1976, Classification of degrees of protection provided 2Normative references by enclosures. The foliowing standards contain provisions which, through reference in this text, constitute provisions of this International 3 Definitions Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged For the purposes of this International Standard, the definitions to investigate the possibility of applying the most recent given in IS 3828 and the following definitions apply. editions of the standards listed below. Members of IEC and iSO maintain registers of currently valid International Standards. nominal size: Figures derived from the drum load and 3.1 holding load, used in designation and marking. ISO 2408 : 1985, Steel wire ropes for general purposes Characteristics. drum load: Maximum load in a topping rope measured 3.2 ISo 2944 : 1974, Fluid power systems and components at the drum exit while hauling-in the rope at the nominal speed, Nominal pressures. the first layer of the rope being wound onto the drum. ISo 3828 : 1984, Shipbuilding and marine structures - Deck 3.3 messenger rope: Rope used for transferring torque machinery - Vocabulary. from a powered winch to an externally powered winch. Figure 1 -- Examples of lightly powered right-hand topping winches Copyright International Organization for Standardization Not for Resale sefromIHS