Other

Valentin A Kotov

Boris E Paton

Igor K Pokhodnya

Mikhail R Unigovsky

Orest M Serafin

Valery N Shlepakov

Veniamin S Rotenfeld

Mark Z Sheinkin

Jury I Saprykin

Vladimir I Slepchenko

Vladimir E Paton

Mikhail G Belfor

Efim Y Leschinsky

Alexandr G Mazel

Leonid N Kopylov

Andrei N Kutovoi

Vasily Y Dubovetsky

Jury A Gavriljuk

A method and apparatus for welding girth joints in pipelines using two welding heads comprises the steps of moving each of the welding heads upwards around the pipeline along the respective section of the girth joint, feeding a welding wire to each of the welding heads so that the welding wire is fed substantially tangentially with respect to the surface of the pipe, and forming a circumferential weld by moulding it to hold the molten metal of the welding bath in the welding zone. An apparatus for carrying out the method for welding girth joints in pipelines comprises an annular track structure having at least two carriages mounted thereon which are connected with drives adapted to impart a translatory motion to the carriages. Each of the carriages carries a welding head provided with a welding wire feeder and a weld moulding member arranged opposite to the joint being welded. The welding wire feeder includes a guiding nozzle extending under the weld moulding member, with its axis being oriented tangentially to the surface of the pipe to feed the welding wire into the welding zone through the groove of the joint.

Method for welding girth joints in pipe lines

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Kyiv, Ukraine

Valentin A Kotov