| Patents for F16L 9 - Rigid pipes (18,006) |
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| 08/12/1992 | CN2112743U Reinforced fibreglass tube composed integrally with flange |
| 08/06/1992 | DE4139649A1 Thick-walled plastic tube - obtd. by extruding two tubes vertically down into cooling bath and comprising thick scrap plastic outer and virgin polyethylene@ inner |
| 07/29/1992 | EP0202256B2 Method of construction for a covered structure |
| 07/29/1992 | CN2111423U Wind pipe |
| 07/29/1992 | CN2111422U Metal skeleton plastic pipe |
| 07/28/1992 | US5133163 Conduit containing construction block |
| 07/10/1992 | CA2055314A1 Bellows pipe construction and method of manufacture |
| 07/07/1992 | US5127442 Plastic tube formed by spiral winding of hollow section |
| 07/01/1992 | EP0492623A1 Process for making an electric-resistance-welded steel pipe with high strength |
| 07/01/1992 | EP0492129A1 A multi-layer plastic pipe and its method for manufacturing |
| 06/30/1992 | US5125691 High pressure gas pipeline having concentric tubes and vent tubes |
| 06/23/1992 | US5123492 Method and apparatus for inspecting subsurface environments |
| 06/16/1992 | CA1303518C Plastic tube with solid cross-ribs on the outer surface, a mouldingdevice therefor; installation comprising such a device and a method for moulding a plastic tube |
| 06/10/1992 | EP0489137A1 Production pipe having an integrated hydraulic line. |
| 06/10/1992 | CN1061843A Fibre-concrete special pipe |
| 06/03/1992 | CN2106286U Aluminium round pipe improved structure for bicycle |
| 06/02/1992 | CA1302184C Intake manifold and method of making the same |
| 06/02/1992 | CA1302034C Method of and machine for winding tubes from strip |
| 05/31/1992 | WO1992009840A1 Tube joint, in particular for composite tubes |
| 05/31/1992 | CA2074938A1 Pipe connection particularly on composite pipes |
| 05/29/1992 | WO1992008923A1 Locatable magnetic plastic duct and process of making same |
| 05/27/1992 | CN2105410U Rule for making expansion graph of elbow and t-joint of pipe |
| 05/20/1992 | EP0485651A1 Tool for polyfusion welding of extruded plastic-aluminium compound pipes with fittings or moulded parts |
| 05/19/1992 | CA1301057C Tubing collar |
| 05/06/1992 | CN2103713U Metal tube with glass fibre reinforced plastics liner and equipment thereof |
| 05/05/1992 | US5110644 Composition material tube substantially insensitive to the variations of length under the effect of the internal pressure |
| 05/05/1992 | US5109889 Pressure-resistant helical corrugated pipe |
| 05/05/1992 | US5109888 High-pressure metallic pipe provided with connecting head part and method for formation thereof |
| 05/05/1992 | CA1300048C Low load pipe for pipe jacking |
| 04/29/1992 | EP0482277A1 A method of manufacturing a pipe section, a pipe section and a joint between two pipe sections |
| 04/28/1992 | CA1299545C Light weight flexible coaxial vapor recovery hose |
| 04/25/1992 | WO1992008072A1 Process for joining workpiece part made of plastic |
| 04/25/1992 | CA2071643A1 Process for joining workpiece part made of plastic |
| 04/23/1992 | DE4032906A1 Use of steel tape for mfr. of pipes - contg. chromium@ nickel@ and iron@ |
| 04/22/1992 | EP0481368A2 Partial elimination of copper plate from steel strip by mechanical means |
| 04/22/1992 | CN2102424U Closed assembled prefabricated slide tube |
| 04/21/1992 | US5106443 Process for the manufacture of pipe from composite materials based on epoxy resins and 1,7-bis-(1-(2'-aminoethyl)-1,3-diaza-2-cyclopenten-2-yl)heptane |
| 04/21/1992 | US5106235 Watering system |
| 04/14/1992 | US5103870 Carbon deposition preventive double-layered tube for handling carbonaceous compounds |
| 04/09/1992 | DE4030844A1 Oval or circular, hollow fluid conductor - has jacketed outer tube, formed by spiral winding and reading of sheet meal strips |
| 04/08/1992 | CN2101155U High-temp. resistant direct built-in type thermo-insulating tube |
| 04/01/1992 | EP0477216A1 Arrangement in a drainage system |
| 04/01/1992 | CN2100540U Composite tube |
| 03/31/1992 | US5099888 Impact protected, sealed, double-walled pipe body |
| 03/31/1992 | US5099874 Residential waste water disposal system |
| 03/28/1992 | CA2028091A1 Ventilating duct which excludes light |
| 03/24/1992 | US5097870 Composite tubular member with multiple cells |
| 03/18/1992 | EP0475412A2 Carbon fiber-reinforced plastic pipe-shaped article and process for producing the same |
| 03/18/1992 | CN1015924B Concrete compound pipe and its method of manufacture |
| 03/17/1992 | US5095942 Plastic self-insulating ductwork system |
| 03/11/1992 | CN2098600U Metal pipe with non-uniform wall thickness |
| 03/10/1992 | US5094273 Ventilation ducting |
| 03/04/1992 | CN2097935U Antiputrefactive pipe with inside bell socket head |
| 03/03/1992 | US5092710 Underground tubular structural system and process for producing it |
| 02/26/1992 | EP0472293A1 A pipe and a process for its production |
| 02/25/1992 | US5091230 Tube of composite material with a fibrous thermoplastic coating and process for manufacturing such a tube |
| 02/19/1992 | CN2096680U Drainage antirot tube |
| 02/19/1992 | CN2096679U High-strength wear-resisting compound tube |
| 02/17/1992 | CA2031423A1 Fabric duct system using segments with coupling means |
| 02/12/1992 | EP0470606A1 Antistatic fuel line |
| 02/12/1992 | EP0470605A1 Stable length polyamide pipes provided with a glass-fiber reinforced middle layer |
| 02/12/1992 | CN1015493B Indoor drainage pipe and its manufacture |
| 02/10/1992 | CA2048715A1 Polyamide fuel lines having a glass fiber reinforced middle layer |
| 02/10/1992 | CA2048704A1 Antistatic fuel line |
| 02/09/1992 | CA2022844A1 Porous pipe and process for producing same |
| 02/06/1992 | WO1992001885A1 Composite pipe with one or more layers of strip material wound around an inner pipe and reel provided with such a composite pipe wound onto it |
| 02/06/1992 | DE4023542A1 Joint for plastic lining of concrete structures - has edge clips over lug and sealing weld, made using clamping strip with 2 retaining beads |
| 02/04/1992 | CA2048386A1 Pipe and a process for its production |
| 01/22/1992 | EP0467309A1 Joint sleeve and tube fitting |
| 01/22/1992 | CN2093948U Water delivery pipe of plastic |
| 01/22/1992 | CN1015326B Pipe joint element |
| 01/21/1992 | US5082614 Method for producing a composite pipe in a rotating drum |
| 01/16/1992 | DE4030389C1 Composite material tube - mfd. by winding metal foil on steel core and joining outermost or innermost layers explosively |
| 01/15/1992 | EP0429457A4 Conduit liner assembly and method for installation |
| 01/14/1992 | US5081326 Electroconductive composite tube assembly |
| 01/14/1992 | US5080943 Tubing |
| 01/09/1992 | WO1992000437A1 Production pipe having an integrated hydraulic line |
| 01/09/1992 | DE4021563A1 Exhaust outlet for four cylinder IC engine - replaces Y-pipe with pipe having two parallel longitudinal chambers |
| 01/08/1992 | EP0465252A1 Pressurized and/or cryogenic gas containers and conduits made with a gas impermeable polymer |
| 01/08/1992 | EP0262203B1 Fire resistant plastic pipe |
| 01/07/1992 | US5078430 Pipeline for relining sewers and water lines without excavation |
| 01/07/1992 | CA2020577A1 Composite plastic pipe |
| 01/02/1992 | DE4118354A1 Flat sheet with high bending resistance - has rows of rectangular areas with convex cross=sections |
| 01/01/1992 | CN2092017U Water supply column |
| 12/31/1991 | US5076329 Layered fuel-line hose |
| 12/27/1991 | EP0462672A1 Multi-layered tube, piping consisting of several such tubes and method for the gas-tight and liquid-tight connection of two such tubes |
| 12/27/1991 | EP0462193A1 Acid resistant concrete articles, especially sulphur concrete pipes and a method of manufacturing them |
| 12/27/1991 | EP0338070A4 Treadable insulation system with lagging support |
| 12/24/1991 | US5074138 Expandable-contractible |
| 12/19/1991 | DE4117950A1 Pipe driven through ground - comprises pipe inside concrete body with end-pieces of ductile cast iron |
| 12/19/1991 | DE4018753A1 Multilayer tube - has protective layer round leak-proof tube sealed in place by clinging material |
| 12/18/1991 | CN2090913U Wearproof transfer piping made of glass fiber reinforced plastics |
| 12/18/1991 | CN1057018A Acidic and alkaline liquid conveying pipe and its manufacturing technology |
| 12/12/1991 | DE4018365A1 Producing sheet metal components - by laser cutting tube, shaped by internal pressure, giving half-shells free from internal stress |
| 12/10/1991 | US5071173 Plastic pipe for sewer pipe reconstruction |
| 12/04/1991 | EP0459907A1 Method for manufacturing thin-walled tubes of fluorinated resin, particularly polytetrafluoroethylene |
| 12/03/1991 | US5069254 Conduit assembly for cabling |
| 11/28/1991 | DE4016743A1 Oval or circular, hollow fluid conductor |
| 11/27/1991 | EP0458322A2 Double wall fire proof duct |
| 11/27/1991 | EP0458049A2 Hollow body for conveying fluid, manufacturing process and application |