Overview
ISO 18296:2014 - Ships and marine technology - Ship-shifting winches - specifies design, operation, safety, performance and inspection rules for ship‑shifting winches with electric or hydraulic drive. It targets winches used for longitudinal and transverse movement or precise positioning of engineering and offshore vessels, and may be used as a reference for inland operation. The standard covers mechanical design, control and protection systems, testing and product designation.
Key topics and technical requirements
- Design & strength
- Allowable calculated stresses for drive parts (limits given for normal and extreme loading conditions).
- Material and structural requirements for drive parts and drums.
- Steel wire ropes & drum geometry
- Recommended rope constructions (e.g., 6×36WS‑IWRC or 6×41WS‑IWRC, tensile grades cited) and drum sizing rules:
- Minimum drum diameter: ≥ 16 × rope diameter
- Drum running length: ≥ 10 turns per layer
- Flange projection rules for with/without rope guide
- Drive types & controls
- Requirements for electric and hydraulic drives (electrical per IEC 60092; hydraulic per ISO 4413).
- Speed control must be adjustable from stop to maximum and adjustable while working.
- Brakes & safety
- Normally closed drum brake; power‑operated brakes must allow manual override.
- Holding load requirements: electric winches - 1.5× drum load; hydraulic - 1.25× drum load (subject to purchaser agreement).
- Over‑torque/impact protection (overcurrent for motors, overpressure for hydraulics).
- Minimum ingress protection for weather‑deck electrical equipment: IP56 (IEC 60529).
- Performance & testing
- Preferred drum load series and nominal hauling speeds listed (e.g., 50–800 kN; speeds 0.1–0.5 m/s).
- Acceptance testing includes type tests and individual tests; inspection and marking rules (breaking strength range of rope visible on winch).
- Operation & human factors
- Remote operation requirements, emergency stops, and clear directional markings for controls.
Applications and users
ISO 18296 is intended for:
- Shipbuilders and naval architects specifying deck machinery
- Offshore vessel operators and marine engineers for positioning and station‑keeping tasks
- Winch manufacturers and equipment purchasers preparing technical specifications
- Classification societies and surveyors for acceptance and inspection
- Maintenance teams using inspection and testing rules
Keywords: ISO 18296, ship‑shifting winches, ship shifting winch, deck machinery, offshore vessel positioning, hydraulic drive winch, electric winch, winch safety.
Related standards