JPS5633921A - Joint corrosion preventing method of coated steel pipe buried - Google Patents

Joint corrosion preventing method of coated steel pipe buried

Info

Publication number
JPS5633921A
JPS5633921A JP10905379A JP10905379A JPS5633921A JP S5633921 A JPS5633921 A JP S5633921A JP 10905379 A JP10905379 A JP 10905379A JP 10905379 A JP10905379 A JP 10905379A JP S5633921 A JPS5633921 A JP S5633921A
Authority
JP
Japan
Prior art keywords
coated
steel pipe
joint
sheet
welding
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.)
Granted
Application number
JP10905379A
Other languages
Japanese (ja)
Other versions
JPS5754286B2 (en
Inventor
Tatsuaki Takeuchi
Norio Shoji
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan 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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP10905379A priority Critical patent/JPS5633921A/en
Publication of JPS5633921A publication Critical patent/JPS5633921A/en
Publication of JPS5754286B2 publication Critical patent/JPS5754286B2/ja
Granted 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
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/18—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
    • F16L58/181—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings for non-disconnectible pipe joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/18—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using tubular layers or sheathings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/38—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor by liberation of internal stresses
    • B29C63/42—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor by liberation of internal stresses using tubular layers or sheathings
    • 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
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/02—Welded joints
    • F16L13/0254—Welded joints the pipes having an internal or external coating
    • F16L13/0272—Welded joints the pipes having an internal or external coating having an external coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0049—Heat shrinkable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B29L2009/003—Layered products comprising a metal layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

Abstract

PURPOSE:To prevent corrosion effectively at the joint buried of a steel pipe coated with a high-grade anticorrosion material by welding the joint after it is coated on the circumference thereof with a heat-shrinking plastic sheet surrounding the beveled section through a backing strip and covered with a waterproof clamping plate to be tied therearound. CONSTITUTION:The joint of a steel pipe is coated with an adiabatic material 5 in the proximity of the beveled section 3 after a backing strip is brought into contact with the circumference thereof which is clear of a coating layer 2 of a high-grade anticorrosion material. The adiabatic material layer is covered with a thermoplastic resin sheet 11 and then, coated with a heat-shrinking resin sheet 8 spreading over both coating layers 2 and 2 of pipes to be connected. To press the resin sheet 8 evenly, it is clamped with a clamping plate 14 in which a high-foaming soft plastic sheet 12 having a concave section 15 is bonded on a steel plate 7 or the like through a low-foaming hard plastic sheet 13. Under such a condition, while a welding is made at the beveled section 3, the sheet 8 is shrinked by the welding heat and adheres to the pipe body and the coating layers with an adhesive coated on the inner surface thereof.
JP10905379A 1979-08-29 1979-08-29 Joint corrosion preventing method of coated steel pipe buried Granted JPS5633921A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10905379A JPS5633921A (en) 1979-08-29 1979-08-29 Joint corrosion preventing method of coated steel pipe buried

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10905379A JPS5633921A (en) 1979-08-29 1979-08-29 Joint corrosion preventing method of coated steel pipe buried

Publications (2)

Publication Number Publication Date
JPS5633921A true JPS5633921A (en) 1981-04-04
JPS5754286B2 JPS5754286B2 (en) 1982-11-17

Family

ID=14500404

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10905379A Granted JPS5633921A (en) 1979-08-29 1979-08-29 Joint corrosion preventing method of coated steel pipe buried

Country Status (1)

Country Link
JP (1) JPS5633921A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6245990U (en) * 1985-09-06 1987-03-20
JPH0273985U (en) * 1988-11-22 1990-06-06

Also Published As

Publication number Publication date
JPS5754286B2 (en) 1982-11-17

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