Method of welding the end of a first pipe to the end of a second

Details Method of welding the end of a first pipe to the end of a second Method of welding the end of a first pipe to the end of a second

1995-08-11

1997-10-14

Shaw, Clifford C.

Electric heating

Metal heating

Of cylinders

21912511, B23K 912

Patent

active

056768575

ABSTRACT:
A new system for welding sections of pipe together to form a long, continuous pipeline. A welding bug is mounted on a guide track which goes around the circumference of the pipe. The welding bug is provided with a wire feeder, a motor to drive the wire feeder, and driving motor for driving the bug around the track. One may vary the speed of the bug and the wire feeder while the bug is continuously driven around the track. The welding head on the welding bug is powered by a surface-tension-transfer power source. The initial or root pass is made external of the pipe.

REFERENCES:
patent: 4144992 (1979-03-01), Omae et al.
patent: 4273988 (1981-06-01), Iceland et al.
patent: 5227601 (1993-07-01), Black
Stava, "A New, Low-Spatter Arc Welding Machine", excerpted from AWS Welding Journal, no date.
"Evans Automatic Welding Systems Inc. Houston, Texas introduces The Good Line".

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