Overview
ISO 7825:2017 - Shipbuilding - Deck machinery - General requirements provides the common technical and safety characteristics that apply to all types of deck machinery not fully covered by specific product standards. Applicable to ships in all navigation zones, this second edition (2017) updates environmental, material, drum and surface-protection requirements and supersedes ISO 7825:1985. Key uses include design, manufacture, installation, inspection and maintenance of anchoring, mooring, hoisting and hatch‑cover equipment.
Key topics and technical requirements
- Scope and applicability: Common requirements for all deck machinery on ships in all navigation zones.
- Environmental conditions: Designed to operate between −25 °C and +45 °C; resist damp conditions, salt mist, mould, vibration, inclination and sea/wind loads. Specified ship inclination allowances (heeling ±15°, rolling ±22.5°, trimming ±5°, pitching ±7.5°).
- Material and construction: Carbon content limits for welded castings and forgings (e.g., ≤0.23% for welded carbon steels; higher limits for non‑welded castings subject to approval). Welding procedures per ISO 15607; asbestos prohibited.
- Drums and spooling: Minimum flange diameter tied to rope diameter/length; spooling rules require overlapping layers, and specified clearances (e.g., 1.5× cable diameter for steel, 1.0× for synthetic where no spooling gear).
- Operation & safety: Requirements for control ergonomics and forces - lever travel limits (max 600 mm one‑way or 300 mm each side), pedal travel (≤250 mm) and maximum operator efforts (e.g., brake lever ≤160 N, handwheel forces for continuous/short operation). Push‑button control conventions, permanent operational markings and guards for external gears and hot surfaces (>50 °C).
- Inspection & lubrication: Accessible inspection points for gears, bearings and brakes; lubrication nipples per ISO 7824, accessible level checks and drainage; lubrication effective up to 15° inclination.
- Surface protection: Surface preparation to ISO 8501-1 grades (Sa2½ or St3 as applicable) and agreed coating thicknesses.
- Hydraulic & electrical: Hydraulic systems per ISO 4413; shipboard electrical per IEC 60092; minimum weather‑deck electrical protection IP56 (IEC 60529).
- Markings: Permanent product and manufacturer identification and designation according to product standard.
Applications and users
ISO 7825:2017 is used by:
- Shipbuilders and naval architects for deck machinery specification and procurement
- Marine equipment manufacturers and system integrators for design and testing
- Classification societies, ship operators and vessel inspection departments for compliance and survey
- Marine engineers and maintenance teams for installation, inspection and safe operation
Keywords: ISO 7825:2017, deck machinery, shipbuilding standard, drums, lubrication, surface protection, marine safety.
Related standards
Normative references in ISO 7825:2017 include: ISO 3828, ISO 4413, ISO 7824, ISO 8501‑1, ISO 15607, IEC 60092, IEC 60529.
