FR2159724A5 - Plastic clad pipes mfr - by heat shrinking prefabricated (polyethylene) sheath onto heated pipe - Google Patents

Plastic clad pipes mfr - by heat shrinking prefabricated (polyethylene) sheath onto heated pipe

Info

Publication number
FR2159724A5
FR2159724A5 FR7140242A FR7140242A FR2159724A5 FR 2159724 A5 FR2159724 A5 FR 2159724A5 FR 7140242 A FR7140242 A FR 7140242A FR 7140242 A FR7140242 A FR 7140242A FR 2159724 A5 FR2159724 A5 FR 2159724A5
Authority
FR
France
Prior art keywords
sheath
pipe
prefabricated
pref
polyethylene
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
FR7140242A
Other languages
French (fr)
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.)
SIGNUND FRANK
Original Assignee
SIGNUND FRANK
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 SIGNUND FRANK filed Critical SIGNUND FRANK
Priority to FR7140242A priority Critical patent/FR2159724A5/en
Application granted granted Critical
Publication of FR2159724A5 publication Critical patent/FR2159724A5/en
Expired 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
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/10—Coatings characterised by the materials used by rubber or plastics
    • F16L58/1009—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe
    • F16L58/1027—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe the coating being a sprayed layer
    • 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
    • B29C63/0065—Heat treatment
    • B29C63/0069—Heat treatment of tubular articles
    • 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

Abstract

Method comprises placing a pipe inside a prefabricated sheath of similar length and slightly larger diameter and made of a relatively corrosion-resistant heat shrinkable plastic material, and heat shrinking the sheath to a tight fit onto the pipe. Pref. the sheath is pressurised with hot air during insertion of the pipe to sustain the shape of the sheath, and may be suspended vertically over a mandrel which can also accept the pipe and emit hot air. Pref. the supporting base can spin to ensure uniform heating. The sheath is esp. of polyethylene, pref. an irradiated grade, e.g. by the 'Raychem' (RTM) process. Esp. suitable for corrosion protection of steel pipes for conveying hydrocarbons or similar fluids. Can be used to apply sheaths =0.5 mm. thick, but more usually >=1 mm. Prefabricated sheating is more free of pores or thickness variation than cladding applied as coatings from fluidised bed or flame spray techniques.
FR7140242A 1971-11-10 1971-11-10 Plastic clad pipes mfr - by heat shrinking prefabricated (polyethylene) sheath onto heated pipe Expired FR2159724A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7140242A FR2159724A5 (en) 1971-11-10 1971-11-10 Plastic clad pipes mfr - by heat shrinking prefabricated (polyethylene) sheath onto heated pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7140242A FR2159724A5 (en) 1971-11-10 1971-11-10 Plastic clad pipes mfr - by heat shrinking prefabricated (polyethylene) sheath onto heated pipe

Publications (1)

Publication Number Publication Date
FR2159724A5 true FR2159724A5 (en) 1973-06-22

Family

ID=9085586

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7140242A Expired FR2159724A5 (en) 1971-11-10 1971-11-10 Plastic clad pipes mfr - by heat shrinking prefabricated (polyethylene) sheath onto heated pipe

Country Status (1)

Country Link
FR (1) FR2159724A5 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0483657A1 (en) * 1990-10-27 1992-05-06 Dynamit Nobel Aktiengesellschaft Process for fabrication a sheathed detonating cord
US5225621A (en) * 1990-10-27 1993-07-06 Dynamit Nobel Aktiengesellschaft Process for producing a jacketed fuse and fuse product

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0483657A1 (en) * 1990-10-27 1992-05-06 Dynamit Nobel Aktiengesellschaft Process for fabrication a sheathed detonating cord
US5225621A (en) * 1990-10-27 1993-07-06 Dynamit Nobel Aktiengesellschaft Process for producing a jacketed fuse and fuse product

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Legal Events

Date Code Title Description
ST Notification of lapse