Overview
EN ISO 6115:1996 (ISO 6115:1988) - Shipbuilding: Trawl winches - specifies requirements and characteristics for single‑drum and double‑drum trawl winches used in fishing operations. The standard covers winches with electric, electro‑hydraulic, hydraulic, diesel‑hydraulic or externally powered drives, and defines design, control, protection and performance criteria for safe, reliable deck machinery.
Key topics and technical requirements
- Scope and definitions: Applies to main trawl rope drums (single and double) and associated auxiliary drums; defines nominal size, drum load, design torque and nominal rope winding diameters.
- Drive and control systems: Requirements for electrical drives (IEC 92), hydraulic drives (ISO 4413) and enclosure protection (IEC 529 IP56). Local and remote control provisions, with direction of hand‑wheel motion specified for hauling‑in.
- Spooling and drum design: Spooling gear required on main drum for uniform winding; drum diameter ≥ 14 × design rope diameter; flange projection rules when spooling gear fitted or not. Design rope basis: 6 × 24 steel wire rope per ISO 2408.
- Brakes and overload protection: Automatic braking systems, selective brakes for declutchable drums, and requirements for braking torque (total braking torque ≥ 1.5 × design torque). Overload protection shall act at ≤ 1.5 × drum load and include time‑interval devices to prevent transient overload issues. Regenerative and friction braking performance and ratings are specified.
- Performance and speeds: Smooth speed control or stepped control allowed; minimum hauling‑in speed not to exceed 15 m/min. Paying‑out speeds defined for regenerative and friction braking modes.
- Ambient and strength requirements: Designed to operate in typical deck temperatures (open deck −25 °C to +45 °C; enclosed −10 °C to +45 °C unless agreed otherwise). Structural stress limits, basic calculations and material strength margins are specified.
- Instrumentation and signalling: Optional tension, rope‑length and electrical/hydraulic measurement instruments; signalling for operational status, overloads, brake engagement and faults.
- Acceptance tests: No‑load running, hauling‑in at design torque, test at 125% drum load, brake tests at 1.5 × design torque, and checks for abnormal noise, temperature and operation.
Applications and users
- Shipbuilders and marine equipment manufacturers specifying or building trawl winches.
- Fishing vessel owners and operators seeking compliance, safety and performance assurance.
- Naval architects, classification societies and regulatory bodies for design verification and acceptance testing.
- Maintenance and service teams using the standard for inspection, testing and retrofit decisions.
Related standards
- ISO 2408 (steel wire ropes), ISO 4413 (hydraulic systems), ISO 3828 (deck machinery vocabulary), ISO 6482 (warping ends), ISO 2944 (nominal pressures), ISO 7825 (deck machinery requirements), IEC 92 and IEC 529 (electrical installations and enclosures).
Keywords: EN ISO 6115:1996, trawl winches, shipbuilding standard, deck machinery, winch safety, winch design, trawl rope, marine equipment.
