F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
F16L 9/12 (2006.01) B29C 70/20 (2006.01) B32B 1/08 (2006.01) F16L 21/00 (2006.01) F16L 21/06 (2006.01) B29C 67/14 (1990.01) B32B 1/10 (1990.01)
Patent
CA 2109300
DOUBLE-WALL COMPOSITE PIPE AND COUPLING STRUCTURE ASSEMBLY AND METHOD AND APPARATUS FOR MAKING SAME ABSTRACT A double-wall composite pipe comprises a permeable annulus structure separating impermeable inner and outer walls. The permeable annulus structure has micro-fractures formed therein that function to reduce the flow rate and pressure of fluids leaking through the inner wall to thus inhibit fluid leakage. The annulus structure resists the stresses produced by internal fluid pressures and other service loads. The inner and outer walls will remain permanently impermeable while the pipe annulus structure undergoes stress-induced dimensional changes. A coupler assembly mechanically connects each longitudinally adjacent pair of pipes together and comprises two semi-cylindrical half-couplers, a compressible seal ring, a cylindrical retaining sleeve, and a flexible boot that encloses and seals the assembled half-couplers. A leak detecting sensor may be located at the coupler assembly. A preferred method and apparatus for making the pipe and coupler assembly are also taught.
Charles Edward Kaempen
Riches Mckenzie & Herbert Llp
LandOfFree
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