JPS55100830A - Smoothing method for metallic pipe - Google Patents

Smoothing method for metallic pipe

Info

Publication number
JPS55100830A
JPS55100830A JP742279A JP742279A JPS55100830A JP S55100830 A JPS55100830 A JP S55100830A JP 742279 A JP742279 A JP 742279A JP 742279 A JP742279 A JP 742279A JP S55100830 A JPS55100830 A JP S55100830A
Authority
JP
Japan
Prior art keywords
pipe
metallic pipe
corrugated
smooth
tensile strength
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
JP742279A
Other languages
Japanese (ja)
Inventor
Ryosuke Hata
Fumio Imaya
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric 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 Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP742279A priority Critical patent/JPS55100830A/en
Publication of JPS55100830A publication Critical patent/JPS55100830A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To smooth the inner surface of the pipe, on purpose to contrive the reduction of the fluid resistance, by impressing an inner pressure, for generating a tension unexceedable the breaking tensile strength of the pipe material, on the metallic pipe, after laying the corrugated metallic pipe.
CONSTITUTION: The corrugated metallic pipe, advantageous for the transportation purpose, is brought into the erection site, and is laid down through the treatment like as the jointing work, setting work, etc.; after that, a hydraulic pressure, equivalent to 60W100%, for example, of the breaking tensile strength of the pipe material before being corrugated, is impressed on the inside of the pipe, and is kept as it is for about 5W60min. According to this method, almost corrugation disappears from the pipe wall, and the smooth pipe is obtained; therefore, its fluid resistance can be reduced.
COPYRIGHT: (C)1980,JPO&Japio
JP742279A 1979-01-25 1979-01-25 Smoothing method for metallic pipe Pending JPS55100830A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP742279A JPS55100830A (en) 1979-01-25 1979-01-25 Smoothing method for metallic pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP742279A JPS55100830A (en) 1979-01-25 1979-01-25 Smoothing method for metallic pipe

Publications (1)

Publication Number Publication Date
JPS55100830A true JPS55100830A (en) 1980-08-01

Family

ID=11665425

Family Applications (1)

Application Number Title Priority Date Filing Date
JP742279A Pending JPS55100830A (en) 1979-01-25 1979-01-25 Smoothing method for metallic pipe

Country Status (1)

Country Link
JP (1) JPS55100830A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4871145A (en) * 1983-02-23 1989-10-03 Finn Martinsen A/S Device for extension of aluminum ducts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4871145A (en) * 1983-02-23 1989-10-03 Finn Martinsen A/S Device for extension of aluminum ducts

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