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Welding Glossary


 * Gas Metal Arc Welding (GMAW) ** – Gas Metal Arc Welding is an arc welding process, which produces coalescence of metals by heating them with an arc between a continuous filler metal (consumable) electrode and the work. Shielding is obtained entirely from an externally supplied gas or gas mixture. Some methods of this process are called MIG or Co2 welding (non-preferred terms). See MIG Welding.


 * Gas Metal Arc Welding-Electrogas (GMAW-EG) ** - A variation of the gas metal arc welding process using molding shoes to confine the molten weld metal for vertical position welding.


 * Gas Metal Arc Welding-Pulsed Arc (GMAW-P) ** - A variation of the gas metal arc welding process in, which the current is pulsed. See also pulsed power welding.


 * Gas Metal Arc Welding Short Circuiting Arc (GMAW-S) ** - A variation of the gas metal arc welding process in which the consumable electrode is deposited during repeated short circuits. See also short circuiting transfer.


 * Gas Shielding Arc Welding ** - A general term used to describe gas metal arc welding, gas tungsten arc welding, and flux cored arc welding when gas shielding is employed.


 * Gas Tungsten Arc Welding (GTAW) ** - An arc welding process, which produces coalescence of metals by heating them with an arc between a tungsten (non-consumable) electrode and the work. Shielding is obtained from a gas or gas mixture. Pressure may or may not be used and filler metal may or may not be used. (This process has sometimes been called TIG welding, a non-preferred term.) (2) **Gas Tungsten Arc Welding-Pulsed Arc (GTAW-P)** - A variation of the gas tungsten arc welding process in which the current is pulsed. See also Pulsed Power Welding.


 * Globular Transfer (arc welding ** ) - A type of metal transfer in which molten filler metal is transferred across the arc in large droplets.


 * Gouging ** - The forming of a bevel or groove by material removal. See also back gouging.


 * Grinders**


 * Groove ** - An opening or channel in the surface of a part or between two components, which provides space to contain a weld.


 * Groove Angle ** - The total included angle of the groove between parts to be joined by a groove weld.


 * Groove Face ** - That surface of a member included in the groove.


 * Groove Radius ** - The radius used to form the shape of a J- or U-groove weld joint.


 * Groove Type ** - The geometric configuration of a groove.


 * Groove Weld ** - A weld made in the groove between two members to be joined. The standard types of groove welds are as follows:
 * Double-Bevel-Groove Weld
 * Double-Flare-Bevel-Groove Weld
 * Double-Flare-V-Groove Weld
 * Double-J-Groove Weld
 * Double-U-Groove Weld
 * Double-V-Groove Weld
 * Single-Bevel-Groove Weld
 * Single-Flare-Bevel-Groove Weld
 * Single-Flare-V-Groove Weld
 * Single-J-Groove Weld
 * Single-U-Groove Weld
 * Single-V-Groove Weld
 * Square-Groove Weld


 * Ground Connection ** - An electrical connection of the welding machine frame to the earth for safety. See also work connection and work lead.


 * Ground Lead ** - When referring to the connection from the welding machine to the work, see preferred term Work piece Lead.


 * Gun ** - arc welding gun. In semi-automatic, machine and automatic welding, a manipulating device to transfer current and guide the electrode into the arc. It may include provisions for shielding and arc initiation.

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