METHOD FOR MANUFACTURING ELECTROSEAMED METAL TUBE, AND ELECTROSEAMED METAL TUBE

Number of patents in Portfolio can not be more than 2000

United States of America

APP PUB NO 20200009680A1
SERIAL NO

16482639

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Provided is a method for manufacturing an electric resistance welded metal pipe by butting side ends of a metal strip against each other and then welding the side ends by high frequency heating to manufacture an electric resistance welded metal pipe, each side end being provided with an inner surface side corner portion located on an inner surface side of the electric resistance welded metal pipe, wherein the method comprises a step of forming an inclined surface at the inner surface side corner portion before butting the side ends of the metal strip; and wherein the side ends are butted and welded to each other such that the inclined surface remains on an excess metal of the metal pipe after electric resistance welding and a discharged metal is not welded to the excess metal.

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Patent Owner(s)

Patent OwnerAddress
NIPPON STEEL NISSHIN CO LTD4-1 MARUNOUCHI 3 CHOME CHIYODA-KU TOKYO 1008366
NIPPON STEEL NISSHIN PIPE CO LTD4-1 MARUNOUCHI 3-CHOME CHIYODA-KU TOKYO 1000005

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akiduki, Makoto Tokyo, JP 1 0
Igawa, Shigenobu Aichi, JP 1 0
Makihara, Yasumasa Aichi, JP 1 0
Omosako, Kouji Tokyo, JP 4 3
Tanaka, Ryota Aichi, JP 12 18

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