GB1005251A - Heat treatment of welded pipes - Google Patents

Heat treatment of welded pipes

Info

Publication number
GB1005251A
GB1005251A GB896963A GB896963A GB1005251A GB 1005251 A GB1005251 A GB 1005251A GB 896963 A GB896963 A GB 896963A GB 896963 A GB896963 A GB 896963A GB 1005251 A GB1005251 A GB 1005251A
Authority
GB
United Kingdom
Prior art keywords
bend
welds
heat treatment
elbow
heat
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.)
Expired
Application number
GB896963A
Inventor
Leonard Terence Johnson
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.)
Kemwell AG
Original Assignee
Kemwell AG
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 Kemwell AG filed Critical Kemwell AG
Priority to GB896963A priority Critical patent/GB1005251A/en
Publication of GB1005251A publication Critical patent/GB1005251A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Thermal Insulation (AREA)

Abstract

<PICT:1005251/C6-C7/1> Welds joining iron or steel pipes to an elbow or bend connecting them are stress-relieved by applying a layer of exothermic composition only to the region of the welds, and enclosing the welds and the elbow or bend in a box-like structure of heat-insulating material which is spaced from them by an air gap. As shown in Fig. 1, pipes 1 and 2 are welded at 4 and 5 to bend 3, exothermic composition 6 being applied to the weld area. The whole of the exothermic material and the bend are enclosed in housing 7 built up of heat-insulating slabs, which may consist of asbestos compositions, furnace aggregate, grog or sand. Specification 898,232 is referred to.
GB896963A 1963-03-06 1963-03-06 Heat treatment of welded pipes Expired GB1005251A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB896963A GB1005251A (en) 1963-03-06 1963-03-06 Heat treatment of welded pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB896963A GB1005251A (en) 1963-03-06 1963-03-06 Heat treatment of welded pipes

Publications (1)

Publication Number Publication Date
GB1005251A true GB1005251A (en) 1965-09-22

Family

ID=9862796

Family Applications (1)

Application Number Title Priority Date Filing Date
GB896963A Expired GB1005251A (en) 1963-03-06 1963-03-06 Heat treatment of welded pipes

Country Status (1)

Country Link
GB (1) GB1005251A (en)

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