Abstract: A rubber hose includes a distinctly colored inner wear indicator integrated into its liner, wherein a distance b of the inner wear indicator from the inner surface of the liner is less than 40% of the liner's thickness v, and height h of the wear indicator, measured perpendicularly to a longitudinal axis of the hose, falls between 1% to 90% of liner thickness v, or even from 10% to 40% of the liner thickness v. The inner wear indicator may have concentric sectional surface area of the inner wear indicator may even gradually decrease in the radial direction as a function of distance from the longitudinal axis. The rubber hose may be connected at one end to a plunger pump and connected at a second to a common manifold, in an oilfield pump system, or used in any hose application in an oilfield fluid pump system.

Abstract: A high-pressure, large-bore bonded flexible rubber pipe resistant to aggressive chemicals and gases, particularly for conveying gas or oil, the flexible pipe having a liner made of poly(vinylidene-fluoride) homopolymer or copolymer wherein a hydrogenated nitrile rubber-based, peroxide-vulcanized rubber compound 2 is bonded to the poly(vinylidene-fluoride) liner, which has a Mooney 05, 150° C. scorch time of at least 10 minutes. Further, a method for manufacturing such hoses, the method including vulcanization performed at a temperature of at least 160° C.

Abstract: A high-pressure, large-bore bonded flexible rubber pipe resistant to aggressive chemicals and gases, particularly for conveying gas or oil, the flexible pipe having a liner made of poly(vinylidene-fluoride) homopolymer or copolymer wherein a hydrogenated nitrile rubber-based, peroxide-vulcanized rubber compound 2 is bonded to the poly(vinylidene-fluoride) liner, which has a Mooney 05, 150° C. scorch time of at least 10 minutes. Further, a method for manufacturing such hoses, the method including vulcanization performed at a temperature of at least 160° C.

Abstract: A high-pressure, large-bore bonded flexible rubber pipe resistant to aggressive chemicals and gases, particularly for conveying gas or oil, the flexible pipe having a liner made of poly(vinylidene-fluoride) homopolymer or copolymer wherein a hydrogenated nitrile rubber-based, peroxide-vulcanized rubber compound 2 is bonded to the poly(vinylidene-fluoride) liner, which has a Mooney 05, 150° C. scorch time of at least 10 minutes. Further, a method for manufacturing such hoses, the method including vulcanization performed at a temperature of at least 160° C.

Abstract: The invention relates to a hose comprising a steel coupling (1), in which the structural elements of the hose, namely the reinforcing plies (4), liner (12), carcass (7), and cover (9) are bonded. The main feature of the invention is that the reinforcing plies (4) of the hose, which are partially or entirely bonded with rubber, are embedded in the adhesive resin layer in the coupling device (1) assembled to the vulcanized hose.

Abstract: A rubber hose provided with an outer metal armouring and a vulcanised and/or adhesively bonded coupling, in particular a flexible rubber hose provided with reinforcing plies, wherein the armouring is constituted by a flexible metal stripwound metalpipe with an interlocked profile (7, 9, 10, 15, 16) which is spliced at least from tow sections and fits with a minimal gap on the hose below.

Abstract: A rubber hose provided with an outer metal armouring and a vulcanised and/or adhesively bonded coupling, in particular a flexible rubber hose provided with reinforcing plies, wherein the armouring is constituted by a flexible metal stripwound metalpipe with an interlocked profile (7, 9, 10, 15, 16) which is spliced at least from tow sections and fits with a minimal gap on the hose below.

Abstract: The invention relates to a hose comprising a steel coupling (1), in which the structural elements of the hose, namely the reinforcing plies (4), liner (12), carcass (7), and cover (9) are bonded.