JPS5674380A - Method of welding spiral welded steel pipe and its device - Google Patents

Method of welding spiral welded steel pipe and its device

Info

Publication number
JPS5674380A
JPS5674380A JP14947279A JP14947279A JPS5674380A JP S5674380 A JPS5674380 A JP S5674380A JP 14947279 A JP14947279 A JP 14947279A JP 14947279 A JP14947279 A JP 14947279A JP S5674380 A JPS5674380 A JP S5674380A
Authority
JP
Japan
Prior art keywords
steel pipe
spiral welded
welded steel
side edge
forming
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP14947279A
Other languages
Japanese (ja)
Other versions
JPS5933069B2 (en
Inventor
Kazutoshi Kakita
Mitsuo Narasaki
Yoshihiro Hara
Yukio Yoshida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP14947279A priority Critical patent/JPS5933069B2/en
Publication of JPS5674380A publication Critical patent/JPS5674380A/en
Publication of JPS5933069B2 publication Critical patent/JPS5933069B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To produce a spiral welded steel pipe at high efficiency by the use of high frequency heating by exerting pressing force to the steel pipe under forming and welding and forming the butt part to a minus gap style.
CONSTITUTION: One or both of the inside surface tracer 7 of forming and molding equipment and outside surface roll stand 8 are screwed down in the direction of an arrow 12, and a minus gap is given at both side edge surface at the welding point 9 of spiral welded steel pipes. In this state, the end part of the preceding steel pipe 3 heated by the high-frequency power supply device provided just before the welding point 9 and the mutually opposing two side edge faces of a half-molten or molten state of a striplike steel plate 1 are pressure-welded. With this method, the need for lap margin owing to the working of the two side edge faces is eliminated and the high-speed production of the spiral welded steel pipe is made feasible.
COPYRIGHT: (C)1981,JPO&Japio
JP14947279A 1979-11-20 1979-11-20 Welding method and device for spiral welded steel pipes Expired JPS5933069B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14947279A JPS5933069B2 (en) 1979-11-20 1979-11-20 Welding method and device for spiral welded steel pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14947279A JPS5933069B2 (en) 1979-11-20 1979-11-20 Welding method and device for spiral welded steel pipes

Publications (2)

Publication Number Publication Date
JPS5674380A true JPS5674380A (en) 1981-06-19
JPS5933069B2 JPS5933069B2 (en) 1984-08-13

Family

ID=15475879

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14947279A Expired JPS5933069B2 (en) 1979-11-20 1979-11-20 Welding method and device for spiral welded steel pipes

Country Status (1)

Country Link
JP (1) JPS5933069B2 (en)

Also Published As

Publication number Publication date
JPS5933069B2 (en) 1984-08-13

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