JPS6453715A - Heat transfer pipe - Google Patents

Heat transfer pipe

Info

Publication number
JPS6453715A
JPS6453715A JP20785687A JP20785687A JPS6453715A JP S6453715 A JPS6453715 A JP S6453715A JP 20785687 A JP20785687 A JP 20785687A JP 20785687 A JP20785687 A JP 20785687A JP S6453715 A JPS6453715 A JP S6453715A
Authority
JP
Japan
Prior art keywords
pipe
heat transfer
transfer pipe
heat
cracks
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
JP20785687A
Other languages
Japanese (ja)
Inventor
Hiroyuki Doi
Yoshimitsu Hida
Masayuki Sukegawa
Hiroshi Fukui
Yukio Nakagawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP20785687A priority Critical patent/JPS6453715A/en
Publication of JPS6453715A publication Critical patent/JPS6453715A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent the deterioration of the thermal efficiency of a heat transfer pipe and development of cracks by forming a metallic layer having the softer property and equal or more superior heat conductivity than inner and outer pipes. CONSTITUTION:The heat transfer pipe is composed of the inner pipe 5 and outer pipe 6 and formed of a ferroalloy steel prescribed heat treated. Then, in the clearance between the inner pipe 5 and the outer pipe 6, an alloy layer 7 is formed by mechanical or metallurgical means out of any one of Cu, Al, Ni, Fe and Ag or based on these metals. At this time, because the materials forming the alloy layer 7 are soft and their heat conductivities are equal or more sperior to the pipe 5, 6, the deterioration of the thermal efficiency is prevented. Further, as the metallic layer 7 exists, the development of the cracks of the heat transfer pipe is prevented.
JP20785687A 1987-08-21 1987-08-21 Heat transfer pipe Pending JPS6453715A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20785687A JPS6453715A (en) 1987-08-21 1987-08-21 Heat transfer pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20785687A JPS6453715A (en) 1987-08-21 1987-08-21 Heat transfer pipe

Publications (1)

Publication Number Publication Date
JPS6453715A true JPS6453715A (en) 1989-03-01

Family

ID=16546665

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20785687A Pending JPS6453715A (en) 1987-08-21 1987-08-21 Heat transfer pipe

Country Status (1)

Country Link
JP (1) JPS6453715A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5297410A (en) * 1991-12-10 1994-03-29 Bundy International Limited Method of manufacturing a multiple-walled tube
WO2001043895A1 (en) * 1999-12-14 2001-06-21 Carlieuklima Spa Method to produce radiating tubes and relative radiating tubes for radiancy heating lines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5297410A (en) * 1991-12-10 1994-03-29 Bundy International Limited Method of manufacturing a multiple-walled tube
WO2001043895A1 (en) * 1999-12-14 2001-06-21 Carlieuklima Spa Method to produce radiating tubes and relative radiating tubes for radiancy heating lines

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