Rocks & mirror
WÄRTSILÄ
Encyclopedia of Marine and Energy Technology

W

181 results

Weather deck

marine

A deck which is completely exposed to the weather from above and from at least two sides, (SOLAS).

Weather forecasting

energy

Weather forecasting is the application of science and technology to predict the conditions of the atmosphere for a given location and time.

Weather station

energy

A weather station is a facility, either on land or sea, with instruments and equipment for measuring atmospheric conditions to provide information for weather forecasts and to study the weather and climate.

Weather vane

energy

An instrument used for showing the direction of the wind, also known as wind vane or weathercock.

Weatherhead

energy

A weatherproof service drop entry point where overhead power or telephone wires enter a building, or where wires transition between overhead and underground cables.

Weathertight

marine

Weathertight means that in any sea conditions water will not penetrate into the ship, (ICLL).

Weathertight door

marine

A door fitted in a structure above the freeboard deck. It must be of adequate strength and able to maintain the watertight integrity of the structure.

Web

marine

A flat plate with a flanged or stiffened edge.

Web frame

marine

A deep-section built-up frame which provides additional strength to the structure.

Webinar

energy

A method that can be used to present information or conduct a meeting via an online link with participants that are unable to attend a face to face meeting.

Weight

energy

Weight is the force exerted on an object by gravity.

Weir

energy

A weir or low head dam is a barrier across the width of a river that alters the flow characteristics of water and usually results in a change in the height of the river level.

Weld defects

marine

The most common type of discontinuities are: cracks, incomplete fusion, slag inclusions, porosity, undercut. Imperfections of welding connections can be isolated or clustered.

Weld metal corrosion

marine

A preferential corrosion of the weld deposit due to an electrolytic action between the weld metal and base metal.

Weldability

marine

The capacity of a material to be welded under the imposed fabrication conditions into a specific, suitably designed structure and to perform satisfactorily in the intended service.

Welder

marine

One who performs a manual or semiautomatic welding operation.

Welder certification

marine

A written certification that a welder has produced welds meeting a prescribed standard of the performance.

Welder qualification test

marine

To ensure that a welder possesses the necessary skils to produce a sound weld he must complete a test piece which is representative of conditions that will be encountered during production welding.

Welding

marine

A joining process that produces coalescence of materials by heating them to the welding temperature, with or without application of pressure or by the application of pressure alone, and with or without the use of filler metal.

Welding machine

marine

The equipment used to perform the welding operation. For example: spot welding machine, arc welding machine, and seam welding machine.

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