ISO 3434-2012 pdf free download.Ships and marine technology一Heated glass panes for ships’ rectangular windows.
ISO 3434 specifies construction characteristics, optical qualities and heat current circuit, as well as the tolerances, tests, marking and designation of heated glass panes for ships’ rectangular windows of the heated series according to ISO 3903.
It includes the conditions to comply with the safety of ships in times of frost and/or snow, particularly during manoeuvres in port.
Heated glass panes are used on ships principally for the windows of wheel-houses and bridges, as well as in enclosed locations used for look-out and manoeuvring purposes. This International Standard specifies heated glass panes which are intended for use at temperatures down to —40 °C.
2 Normative references
The following cited documents are indispensable for the application of this document. For dated references, the edition cited applies only. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 554:1976, Standard atmospheres for conditioning and/or testing — Specifications
ISO 614, Shipbuilding and marine technology — Toughened safety glass panes for rectangular windows and side scuttles — Punch method of non-destructive strength testing
ISO 3903, Ships and marine technology — Ships’ ordinary rectangular windows
ISO 5779:1987, Shipbuilding — Ordinary rectangular windows — Positioning
ISO 21005, Ships and marine technology— Thermally toughened safety-glass panes for windows and side scuttles
IEC 60092-101, Electrical installations in ships — Part 101: Definitions and general requirements
IEC 60529:2001 Degrees of protectiOn provided by enclosures (IP Code)
3 Optical requirements
3.1 Requirements
When heated glass panes are installed in windows, they shall comply with the requirements in 3.2 and 3.3.
All the optical requirements shall apply independent of the kind of temperature control (for example, a thermostat).
However, these optical qualities are not required at the periphery of the glass pane within a distance of 50 mm width, see Figure 1.
3.2 Visibility
Heated glass panes shall ensure perfect visibility in all weather, avoiding the formation of mist or frost, in relation to the heat output, see Table 3. In addition, they shall ensure maximum efficiency of the windscreen wipers when operating in conditions of frost and/or snow. They shall not cause any significant reduction in the ability of a person to see with the naked eye or binoculars when a distant object is observed at normal line of vision through the glass. National and international regulations must be considered.
Tinted glass shall not be used.
3.3 Discoloration
Heated glass panes shall not cause any deterioration in perception of colour, or perceivable discoloration of objects. in particular colours of signal lights and lights on buoys.
4 Construction of glass pane
4.1 General
A complete mountable heated glass pane that meets the requirements of this International Standard is an assembly consisting of laminated glass panes and a durable mounted device for the electrical connection.
4.2 Composition and materials
Samples of the composition of the laminated glass panes are shown in Table 1 and Figure 2.SO 3434 pdf free download.
Tags: Ships and marine technology
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