JPS54157708A - Heat treatment for increasing strength of pipe - Google Patents

Heat treatment for increasing strength of pipe

Info

Publication number
JPS54157708A
JPS54157708A JP6574178A JP6574178A JPS54157708A JP S54157708 A JPS54157708 A JP S54157708A JP 6574178 A JP6574178 A JP 6574178A JP 6574178 A JP6574178 A JP 6574178A JP S54157708 A JPS54157708 A JP S54157708A
Authority
JP
Japan
Prior art keywords
pipe
outside
heated
take place
heat treatment
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
JP6574178A
Other languages
Japanese (ja)
Inventor
Yoshimi Sato
Tasuku Shimizu
Kunio Enomoto
Kensho Matsuda
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 JP6574178A priority Critical patent/JPS54157708A/en
Publication of JPS54157708A publication Critical patent/JPS54157708A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/02—Rigid pipes of metal

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

PURPOSE: To prevent stress-corrosion cracking by the procedure in which an object to be heated is kept beforehand inside a pipe and then heated to a high temperature so as to produce a temperature difference between the outside and inside surfaces of the pipe, whereby causing a tensile yield to take place in the inside and also a comrpressive yield to take place in the outside.
CONSTITUTION: The fluid 7 heated is put in the inside of the pipe 2, and then the outside surface of the pipe 2 is heated to higher temperature by means of the heating coil 3 so as to produce a temperature difference between the outside and inside surfaces, whereby causing a tensile yield to take place in the inside and also a compressive yield to take place in the outside. Thus, it is possible to increase the strength and also to prevent the occurrence of stress-corrosion cracking in the pipe.
COPYRIGHT: (C)1979,JPO&Japio
JP6574178A 1978-06-02 1978-06-02 Heat treatment for increasing strength of pipe Pending JPS54157708A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6574178A JPS54157708A (en) 1978-06-02 1978-06-02 Heat treatment for increasing strength of pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6574178A JPS54157708A (en) 1978-06-02 1978-06-02 Heat treatment for increasing strength of pipe

Publications (1)

Publication Number Publication Date
JPS54157708A true JPS54157708A (en) 1979-12-12

Family

ID=13295736

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6574178A Pending JPS54157708A (en) 1978-06-02 1978-06-02 Heat treatment for increasing strength of pipe

Country Status (1)

Country Link
JP (1) JPS54157708A (en)

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