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jacket, 1
1. A metal or cloth covering over the heat insulation which is applied to exposed heating pipes and ducts.
2. An outer casing around a pipe or vessel, the space between being filled with a fluid for cooling, heating, or maintaining a fixed temperature.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Head porter Mel Brookes, smartly decked out in breeches, socks, a white shirt and an overjacket, runs a guided tour to the Abbey on Sundays and offers an amusing commentary on the historic building.
2) in the latter's New York studio: "For this purpose he dressed himself in the costume which he deemed most appropriate to his character," a cloth shirt, a fringed shawl overjacket, with tomahawk and a large medal awarded him by George Washington.