JPS555165A - Production of seamed pipe - Google Patents

Production of seamed pipe

Info

Publication number
JPS555165A
JPS555165A JP7782878A JP7782878A JPS555165A JP S555165 A JPS555165 A JP S555165A JP 7782878 A JP7782878 A JP 7782878A JP 7782878 A JP7782878 A JP 7782878A JP S555165 A JPS555165 A JP S555165A
Authority
JP
Japan
Prior art keywords
pipe
parts
circumferential groove
heated
rolls
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.)
Pending
Application number
JP7782878A
Other languages
Japanese (ja)
Inventor
Nobuaki Hiraoka
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
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP7782878A priority Critical patent/JPS555165A/en
Publication of JPS555165A publication Critical patent/JPS555165A/en
Pending legal-status Critical Current

Links

Landscapes

  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

PURPOSE: To enable the seamed pipe to be produced at high efficiency to a high quality equivalent to that of electric-welded tubes by locally heating the butt edge parts of an open pipe formed from heated skelp up to its melting temperature and pressure contacting said parts with pressure rolls provided with a circumferential groove on the portion corresponding to the edge part.
CONSTITUTION: The skelp 2 having been heated to about 1000 to 1300°C in a heating furnace 1 is formed to an open pipe 2a by perpendicular forming rolls 3. Next, the pipe is introduced into a heating unit such as high frequency induction heating unit 4 or the like, where both edge parts 2b are locally heated to a melting temperature of about 1400°C. Thereafter, these parts are bonded immediately by horizontal pressure rolls 5 provided with a circumferential groove 8 in the portion opposing to the pipe seam part. The pipe then subsequently pass through drawing rolls 61, 62... whereby it is drawn to a desired size. AT the amset, the outside beads 2C overhanging to the circumferential groove 8 are cut away with a bead cutter 7.
COPYRIGHT: (C)1980,JPO&Japio
JP7782878A 1978-06-26 1978-06-26 Production of seamed pipe Pending JPS555165A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7782878A JPS555165A (en) 1978-06-26 1978-06-26 Production of seamed pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7782878A JPS555165A (en) 1978-06-26 1978-06-26 Production of seamed pipe

Publications (1)

Publication Number Publication Date
JPS555165A true JPS555165A (en) 1980-01-16

Family

ID=13644892

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7782878A Pending JPS555165A (en) 1978-06-26 1978-06-26 Production of seamed pipe

Country Status (1)

Country Link
JP (1) JPS555165A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58122124A (en) * 1982-01-12 1983-07-20 Nippon Steel Corp Forming method of forge welding steel pipe
US4945743A (en) * 1988-03-23 1990-08-07 Sumitomo Metal Industries, Ltd. Apparatus for manufacturing electric welded pipes under hot conditions
US5005395A (en) * 1988-03-23 1991-04-09 Sumitomo Metal Industries, Ltd. Method of manufacturing electric welded pipes under hot conditions

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58122124A (en) * 1982-01-12 1983-07-20 Nippon Steel Corp Forming method of forge welding steel pipe
US4945743A (en) * 1988-03-23 1990-08-07 Sumitomo Metal Industries, Ltd. Apparatus for manufacturing electric welded pipes under hot conditions
US5005395A (en) * 1988-03-23 1991-04-09 Sumitomo Metal Industries, Ltd. Method of manufacturing electric welded pipes under hot conditions

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