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A colourless gas, chemically inactive used for shielding the weld from atmosphere in welding.
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Related Terms |
SEAL WELD
A weld used primarily to obtain tightness and prevent leakage.
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BACKING RING
A strip of thin plate used on the inner surfaces of the abutting ends of pipe, tubes, or plates which are butt-welded. Its purpose is to prevent irregularities at the base weld and to permit penetration at its root.
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BUTT WELD
A circumferential weld in pipe fusing the abutting pipe walls completely from inside wall to outside wall.
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SOCKET FITTING
A fitting used to join pipe in which the pipe is inserted into the fitting. A fillet weld is then made around the edge of the fitting and the outside wall of the pipe.
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CRATER
1) The central magma outlet tube of a volcano. 2) A ground depression caused by explosion, impact or remnant from extinct volcano. 3) A depression in a weld as the result of molten metal displaced from the weld point.
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HOSE TEST
The method by which a seam or weld is tested for watertightness, by applying a jet of water from a hose from one side, and checks made from the other side for any seepage, or passage of water.
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WELD
A hot melt method of fusing metals.
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BEAM CLIP
A device for attaching a pipe hanger to its associated structural beam when it is undesirable to weld the pipe hanger to supporting structural steelwork. Also known as girder clamp; girder clip.
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COVER PLATE
A pane of glass in a welding helmet or goggles which protects the colored lens excluding harmful light rays from damage by weld spatter.
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MERCURY BAROMETER
An instrument which determines atmospheric pressure by measuring the height of a column of mercury which the atmosphere will support; the mercury is in a glass tube closed at one end and placed, open end down, in a well of mercury. Also known as Torricellian barometer.
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