ISO 17941:2015

Overview

ISO 17941:2015 - Ships and marine technology - Hydraulic hinged watertight fireproof doors - defines requirements for the design, manufacture and acceptance of hydraulic hinged watertight fireproof doors used on ships, floating structures and ocean engineering. The standard covers classification and designation, materials, test methods, marking, packaging, transport and storage for watertight doors with working water pressure up to 1.0 MPa. Annexes include schematic diagrams for manual, hydraulic and electro‑hydraulic and electrical systems.

Key topics and technical requirements

• Scope and designation
  • Applicable for door types R (right‑hand) and L (left‑hand) and fire‑protection ratings A‑60, A‑30, A‑15, A‑0.
  • Standard designation format example: “Hydraulic hinged watertight fireproof door ISO 17941–A60R1800×750 – 0,5”.
• Dimensions and clear opening
  • Nominal sizes referenced to ISO 3796 clear openings; alternate sizes may be agreed between purchaser and manufacturer.
• Materials and construction
  • Minimum mechanical properties are specified (e.g., door panel yield strength 355 N/mm2; tensile 490–620 N/mm2). Insulation and structural materials must be non‑combustible meeting the IMO FTP Code (Annex 1, Part 1).
• Sealing and tightness
  • Sealing contact verified by powder contact test; hydrostatic test at the working pressure (offshore test = working pressure + 5 m water head) with no leakage.
• Hydraulic and electrical systems
  • Hydraulic components (pumps, cylinders, accumulators, piping, valves) comply with Administration or Classification Society rules; Annex A/B contain schematic diagrams.
  • Hydraulic system must withstand 1.5× working pressure without leakage.
• Control and performance
  • Control panel functions: “Close all doors”, “Local”, “Close individually”.
  • “Close all doors” must close all open doors within 60 s; powered closing times and manual backup (hand pump) are specified (manual closing ≤ 90 s; accumulator to operate 3 cycles at cut‑in pressure).
• Fabrication and finish
  • Weld quality to AWS D1.1/D1M; surface preparation at least ISO 8501‑1 Sa2½; anti‑corrosion coating and proper packaging, transport and storage requirements included.

Applications and users

ISO 17941:2015 is intended for:

• Shipyards and naval architects specifying watertight, fire‑resistant doors
• Door manufacturers and OEMs producing hydraulic hinged watertight doors
• Classification societies, flag administrations and surveyors performing acceptance tests
• Offshore and marine engineers for floating platform access control and compartmentation Practical applications include machinery spaces, accommodation boundaries, and watertight bulkhead penetrations where combined watertight integrity and fire resistance are required.

Related standards

• ISO 3796 - clear openings for external single‑leaf doors
• ISO 8501‑1 - surface preparation (Sa2½)
• IEC 61162‑1 - maritime digital interfaces (referenced for electrical systems)
• AWS D1.1/D1M - structural welding code (weld quality)
• IMO FTP Code (2010) - fire‑resistant materials and components

Keywords: ISO 17941:2015, hydraulic hinged watertight fireproof doors, watertight doors, ships, marine technology, hydrostatic test, fire resistance, hydraulic system, door control.