WELDING METHOD FOR SEAM OF INSIDE SURFACE OF METALLIC PIPE HAVING BENT PART

PURPOSE:To smoothly weld a gap on the inside surface at a seam from inside in the welded piping of a metallic pipe having a bent part. CONSTITUTION:In the shielding gas 2 that is poured for filling inside a bent pipe 9 from the welding equipment including a driving device which is attached to the en...

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1. Verfasser: SHIMIZU SADAO
Format: Patent
Sprache:eng
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Zusammenfassung:PURPOSE:To smoothly weld a gap on the inside surface at a seam from inside in the welded piping of a metallic pipe having a bent part. CONSTITUTION:In the shielding gas 2 that is poured for filling inside a bent pipe 9 from the welding equipment including a driving device which is attached to the end part of a piping parts, an insulated flexible tube 3 is inserted which is provided with a guiding plate 7 and capable of freely passing the curve of the pipe; an arc is generated from an electrode 6, which is attached to a core bar 5 at the tip end of a built-in inner wire 4, and a revolution is transmitted to smoothly perform the welding-all-around of a seam part 10.