Nitto-denko Corporation

Nippon Kokan Co., Ltd.

Nippon Kokan Kabushiki Kaisha

Nippon Kokan Koji Kabushiki Kaisha Kanagawa

Akio Kida

Yoshihiro Okano

Norio Shoji

Toshiyuki Namioka

Minoru Komura

Kiyotaka Hirahara

Ryouichi Ikeda

A method for applying a corrosion-protective coating, with a heat-shrinkable tube, to a joint between welded end portions of corrosion-protectively coated steel pipes, has a configuration comprising the steps of: preparing a coating implement having a releasant layer formed on the outer circumferential portion of the heat-shrinkable tube, and a heating layer formed on the outer circumferential portion of the releasant layer; positioning the coating implement so as to cover the welded portion of the joint and its adjacent portions; thermally shrinking the coating implement in a state in which the gap between the coating implement and the aforementioned portions is kept in a vacuum; and removing the releasant layer and the heating layer, whereby the aforementioned portions are corrosion-protectively coated by the heat shrinkage of the tube.

Method for applying corrosion-protective coating to joint between

In a joint between welded end portions of corrosion-protectively coated steel pipes, a heat-shrinkable tube is positioned so as to cover the outer circumference of a welded portion and the outer circumferences of its adjacent portions, and the heat-shrinkable tube is thermally shrunk in a state in which a gap between the heat-shrinkable tube and the aforementioned portions is kept in a vacuum so that the aforementioned portions are corrosion-protectively coated with the heat-shrinkable outer layer of the heat-shrinkable tube thus thermally shrunk.

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Tokyo, Japan

Akio Kida