flash welding

a method of welding metal edge-to-edge with a powerful electric flash followed by the application of pressure.
Also called flash butt welding.
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flash welding

butt welding by creating an electric arc between the two pieces which melts and joins them; used for joining segments of metal pipe 
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Example sentences
Flash welding machines shall be equipped with a hood to control flying flash.
Flash welding was accomplished by forming a steel sheet into a cylindrical shape.
The welding processes described are forge, ultrasonic, and flash welding.
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