To surely join and cover corrosion-resistant metallic plates by applying corrosion-proof resin at intervals on the surface of a steel pipe pile, coiling a corrosion- resistant metallic plate on the steel pipe pile, and performing the resistance seam welding of the corrosion-resistant metallic plate and the steel pipe pile in a nonapplied part by applying a pressure.
After applying a hardening adhesive on the rear of a corrosion-proof resin strip 1 by a container 2, the strip 1 is wound and stuck on the surface of a steel pipe 3 in a spiral shape. The width of the corrosion-proof resin strip 1 is narrower than that of a corrosion-proof metallic plate 4. Nonapplied parts with no resin applied are formed at regular intervals W. The corrosion-resistant metallic plate 5 of a band plate which becomes a backing strip, is let out on the steel pipe 3 with the titanium plate 4. The metallic plate 5 is coiled on the nonapplied parts of the steel pipe 3 in a spiral shape. After coiling the tip part 4a of the titanium plate 4 and the end part 5a of the metallic plate 5, they are welded on this side of a roll 10 by a resistance seam welding machine 11. Another end part 4b of the titanium plate 4, another end part 5b of the metallic plate 5 and the steel pipe 3 are welded by a resistance seam welding machine 12. Welding can be surely performed because welding is performed in the nonapplied parts.
KANEUCHI ISAO
ADACHI TADAMI
FUKANO SHINJI
MATSUOKA KAZUMI
GOTO NOBUHIRO
KANAI HISASHI
AKASAKA MASAYOSHI
TAKAHASHI YASUO
KINOSHITA KAZUHIRO
NIPPON STEEL CORP