Flange is a commonly used word in engineering and mechanical fields, pronounced /flændʒ/. Its spelling is derived from the Old French word "flanc," meaning "side." The letter "g" in "flange" is silent because it follows the letter "n," which causes the sound to be nasal, resulting in the sound of the /ʒ/ consonant. This word is often used to describe a projecting flat rim or edge on a piece of machinery that makes it easier to attach it to other parts.
A flange is a mechanical device that is typically circular in shape and is used to connect two components or objects together securely. It is commonly found in machinery, pipelines, and plumbing systems. The primary function of a flange is to join or support parts, ensuring a leak-proof and rigid connection between them.
Often made of metal or plastic, a flange features a flat, raised, or threaded surface with holes or bolts around its circumference. This design allows it to be bolted or screwed to a corresponding surface on another object or component, creating a tight seal and preventing movement or separation under extreme pressure or vibration.
Flanges can serve various purposes, including connecting pipes, valves, pumps, or other equipment, as well as facilitating the attachment of accessories such as filters, gauges, or expansion joints. Their versatility enables easy installation, maintenance, and disassembly of systems while maintaining structural integrity and preventing leaks.
Furthermore, flanges come in different types and designs, each catering to specific applications and operating conditions. Common types include slip-on, threaded, welding neck, blind, lap joint, and socket weld flanges, among others. These variations allow for flexibility in selecting the appropriate flange based on factors such as material, size, pressure rating, and temperature requirements.
Overall, flanges play a pivotal role in numerous industries, providing secure connections and ensuring the smooth operation of various systems and equipment.
A raised or projecting rim of anything, as of a railway-wheel, or a pipe.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
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The word "flange" originated in the 17th century, derived from the Old French word "flanchir" which means "to bend". It was used to describe a projecting rim or edge, often present on wheels or other mechanical parts. The term later transitioned into Middle English as "flange" with the same meaning. It refers to a protruding or raised edge that helps provide support, strengthening, or attachment to another object or surface.