ISO 3434:2012

Overview

ISO 3434:2012 - Ships and marine technology: Heated glass panes for ships' rectangular windows - defines requirements for construction, optical performance, heating circuits, tolerances, tests, marking and designation of heated laminated glazing used for ship windows (wheelhouses, bridges and lookout/manoeuvring stations). The standard covers heated panes intended for service temperatures down to −40 °C and addresses safety and visibility during frost and snow conditions.

Key topics and technical requirements

• Scope: Construction characteristics, optical qualities, heat circuit, tolerances, tests, marking and designation for heated series windows per ISO 3903.
• Optical requirements: Clear main vision area (50 mm peripheral exemption), no tinted glass, no perceptible colour distortion of signal lights, effective de-misting/de-icing and wiper compatibility.
• Construction and materials: Laminated assemblies with a carrier pane (thermally toughened per ISO 21005), a cover pane (toughened or semi-toughened), an interlayer (e.g., PVB) and a heating element (thin wire, conductive film or coating). Two types: Type A (two laminated panes) and Type B (three laminated panes).
• Edge protection: Sealed edge bonding (silicone, rubber, polysulfides etc.) to prevent moisture ingress and provide insulation (edge bond not thicker than 3 mm).
• Dimensional tolerances: Thickness and flatness/parallelism tolerances (flatness max 3 mm/1 000 mm; parallelism max 1 mm/1 000 mm).
• Heat output (typical):
  • 7–9 W/dm² - effective down to −12 °C
  • 12–15 W/dm² - effective down to −28 °C
  • 17–21 W/dm² - effective down to −40 °C
• Electrical / safety: Supply per IEC 60092-101; moisture-proof connection boxes min. IP22; overheating protection to limit surface temperature ≤ 50 °C with single (S) or group (G) regulation.
• Testing & certification: Electrical dielectric test (1 min: AC 1 000 V + 2× rated voltage, min 1 500 V, 25–100 Hz), mechanical strength per ISO 614; testing labs should comply with ISO/IEC 17025.
• Marking & designation: Standardized triangular mark showing total thickness, heat output, voltage ID and type (A/B).

Applications and users

• Practical for shipbuilders, naval architects, marine glazing manufacturers, suppliers of heated windscreen systems, ship electrical installers, and port/commissioning inspectors.
• Use cases: wheelhouse and bridge windows, lookout windows, pilot stations and any enclosed manoeuvring/viewing positions where de-icing and clear visibility are critical.

Related standards

• ISO 3903 (ships’ ordinary rectangular windows), ISO 21005 (toughened safety glass), ISO 614 (strength testing), IEC 60092-101 (ship electrical installations), IEC 60529 (IP codes), ISO/IEC 17025 (lab competence).

Keywords: ISO 3434:2012, heated glass panes, ships' rectangular windows, marine windows, de-frosting, bridge windows, heat output, electrical connections, laminated glass, marine glazing.