EP0166385A2
Expired / Lapsed
EP
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Flexible composite pipe for high-temperature fluids
Assignee: Furukawa Electric Co Ltd
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Filing: 1985-06-20
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Granted: —
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Expires: 2005-06-20
Abstract
Abstract A flexible composite pipe for transporting a high-temperature fluid of the invention has an inner pipe (3) for passing a high-temperature, high-pressure fluid therethrough, a reinforcing layer (4, 5) formed around the inner pipe (3), and a protective sheath layer (6) formed around the reinforcing layer (4, 5). The inner pipe consists of a material which is selected from a polyvinylidene fluoride copolymer resin, a blend thereof with a polyvinylidene fluoride resin, or a composition based on the polyvinylidene fluoride copolymer resin and which has, when hot pressed into a sheet, an Izod impact strength of 10 kg-cm/cm or more and an apparent Young's modulus in tension of 90 kg/mm 2 or less.
Inventors
- 👤 Kazuo Sadamitsu
- 👤 Yoshiyuki Makino
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 23:25
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/78; B29C53/583; F; F16; F16L; F16L11/00; F16L11/04; F16L11/08; F16L11/081; F16L11/083; F16L11/10; F02; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
100 words
A flexible composite pipe for transporting a high-temperature fluid, comprising: an inner pipe (3) consisting of a pipe obtained by extruding one member selected from the group consisting of polyvinylidene fluoride copolymer resins, blends thereof with polyvinylidene fluoride resins, and compositions based on the polyvinylidene fluoride copolymer resins, which have, when hot pressed into a sheet, an Izod impact strength of not less than 10 kg-cm/cm and an apparent Young's modulus in tension of not more than 90 kg/mm2; a reinforcing layer (4, 5) formed around said inner pipe; and a protective sheath layer (6) coated around said reinforcing layer.
Claim 2
Dependent Claim
100 words
A flexible composite pipe for transporting a high-temperature fluid, comprising: an inner pipe (3) consisting of a pipe obtained by extruding one member selected from the group consisting of polyvinylidene fluoride copolymer resins, blends thereof with polyvinylidene fluoride resins, and compositions based on the polyvinylidene fluoride copolymer resins, which have, when hot pressed into a sheet, an Izod impact strength of not less than 10 kg-cm/cm and an apparent Young's modulus in tension of not more than 90 kg/mm2; a reinforcing layer (4, 5) formed around said inner pipe; and a protective sheath layer (6) coated around said reinforcing layer.
Claim 3
Dependent Claim
46 words
A flexible composite pipe according to claim 1, further comprising an outer layer (7) which is formed around said inner pipe (3) and which consists of a resin having a rigidity at high temperatures which is higher than that of the material of said inner pipe.
Claim 4
Dependent Claim
51 words
A flexible composite pipe according to claim 2, characterized in that the resin of said outer layer having a rigidity at high temperatures which is higher than that of the material of said inner pipe is one member selected from the group consisting of a polyester elastomer and a polyamide resin.
Claim 5
Dependent Claim
51 words
A flexible composite pipe according to claim 1, further comprising an outer layer (7) which is formed around said inner pipe and which consists of gap-wound thin metal tape in at least two layers such that gaps of each layer of said thin metal tape are covered by each overlying layer.
Claim 6
Dependent Claim
62 words
A flexible composite pipe according to claim 1, 2 or 4, further comprising a plastic tape layer (2) wound around a flexible interlocked pipe (1) obtained by interlocking metal strips; and wherein said reinforcing layer (4, 5) formed around said inner pipe (3) is obtained by winding a wire, a strip or a band of a metal or a fiber reinforced plastic.
Claim 7
Dependent Claim
44 words
A flexible composite pipe according to claim 5, characterized in that said reinforcing layer (4, 5) consists of a profile reinforcing strip wound at a short pitch, and flat reinforcing strips wound in different directions in at least two layers at a long pitch.
Claim 8
Dependent Claim
40 words
A flexible composite pipe according to claim 6, characterized in that said reinforcing layer (4, 5) consists of fiber reinforced plastic reinforcing layers, and said reinforcing strips wound at the long pitch have a section with a number of ribs.
Claim 9
Dependent Claim
46 words
A flexible composite pipe according to claim 5 or 6, characterized in that said reinforcing layer (4, 5) comprises two, inner and outer reinforcing layers, and a grease is injected in said inner and outer reinforcing layers (4, 5) and a plastic film is inserted therebetween.
References Cited (Backward Citations)
No citation records indexed.
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