| Patents for F16L 9 - Rigid pipes (18,006) |
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| 08/23/1994 | US5339867 Composite metal tube and method of making the same |
| 08/18/1994 | WO1994018485A1 Multilayer plastic duct |
| 08/18/1994 | WO1994017983A1 Elongate plastic member assembly and method and apparatus for making the same |
| 08/10/1994 | EP0609675A2 Multilayer plastic tube |
| 08/10/1994 | CN2173888Y Gas thread connection steel-plastic composite pipe and union joint |
| 07/31/1994 | CA2114506A1 Multilayer plastic pipe |
| 07/27/1994 | EP0592639A4 Secondary containment flexible underground piping system |
| 07/20/1994 | EP0607085A1 Composite tubular article composed of a vulcanized elastomer associated with a thermoplastic elastomer containing polyamide sequences, specially for a fuel hose and process for its manufacture |
| 07/20/1994 | EP0606349A1 Helically wound reinforced ribbed composite structure |
| 07/20/1994 | CN2172390Y Plastic lining water supply pipeline |
| 07/19/1994 | US5330810 Liquid transfer tube |
| 07/19/1994 | US5329973 Rigid polyvinyl chloride pipe |
| 07/14/1994 | CA2113405A1 Composite tubular articles obtained from a vulcanized elastomer associated with thermoplastic elastomer, such as a gas pump hose, and process for their preparation with polyamide sequences |
| 07/12/1994 | US5328213 Adjustable pipe fitting |
| 07/06/1994 | EP0604907A1 A method of forming a multilayer plastic pipe and a multilayer plastic pipe for conducting fluids |
| 07/05/1994 | US5325893 Air duct and paper therefor |
| 06/30/1994 | DE4304717A1 Composite plastic and copper tubing |
| 06/29/1994 | EP0603753A1 CPVC composition for extrusion of pipe, and pipe therefrom |
| 06/29/1994 | CA2112440A1 Method of forming a multi-layer plastic pipe for conducting fluids, a multi-layer plastic pipe formed by the method, and a method of connecting a multi-layer plastic pipe |
| 06/28/1994 | US5324595 Having inner layer of carbon steel and outer layer of austenitic steel, for soda recovery |
| 06/28/1994 | US5324558 Laminated tube |
| 06/28/1994 | US5324557 Smooth interior |
| 06/23/1994 | WO1994013992A1 Pipe construction |
| 06/22/1994 | CN2169757Y Composite insulation tube |
| 06/15/1994 | EP0601700A2 Reinforced ceramic tube |
| 06/15/1994 | EP0601295A1 Multi-layered plastic tube |
| 06/08/1994 | EP0506930B1 Process for joining plastic component parts |
| 06/08/1994 | CN2168148Y Anti-septic pipeline structure member for transportion of gas or liquid |
| 06/08/1994 | CN1024942C Reinforced pressurization plastic pipe |
| 06/04/1994 | CA2110424A1 Multilayer plastic pipe |
| 05/31/1994 | US5316606 Polyethylene, acrylic acid-ethylene copolymer |
| 05/31/1994 | US5316047 Pressure-resistant helical corrugated pipe |
| 05/26/1994 | WO1994011664A1 Corrosion resistant connection for use with tubular members |
| 05/26/1994 | DE4339447A1 Catalytic converter honeycomb structure - includes passages having thicker outer walls than walls at inner walls in curved section to give uniform fluid velocity |
| 05/26/1994 | DE4339446A1 Radial honeycomb passages have thicker outer walls than walls on inner radial sections - providing uniform fluid velocity through the passages |
| 05/26/1994 | CA2148941A1 Self locking slitted corrugated tubing |
| 05/26/1994 | CA2148498A1 Corrosion resistant connection for use with tubular members |
| 05/25/1994 | CN2166291Y Electronic insulation tube |
| 05/24/1994 | US5314108 Surface of steel strip is coated with nickel, cobalt or alloy, formed into tube, inserting film-forming tin or alloy, heat treating |
| 05/19/1994 | DE4238696A1 Fluid carrier pipe - has projections from inner layer embedded in thermoplastics material of the outer layer |
| 05/18/1994 | EP0597820A1 Heating element for surface heating |
| 05/18/1994 | EP0597120A1 Tubular laminate and production thereof |
| 05/18/1994 | CN2165306Y High anti-impact three-layer wall water supply pipe |
| 05/17/1994 | US5312026 Welded tube with excellent corrosion-resistant inner surface and method of producing the same |
| 05/11/1994 | WO1994010497A1 Multilayer fire protective coating |
| 05/11/1994 | WO1994010492A1 Improved offshore umbilical and method of forming an offshore umbilical |
| 05/11/1994 | WO1994010491A1 Plastic fluid duct |
| 05/11/1994 | WO1994010490A1 Fibre-reinforced plastic pipe |
| 05/11/1994 | DE4240364C1 Impact-damper with sliding tubes for vehicles - has tubes with evenly spaced openings and coated with elastic material on inside and outside |
| 05/11/1994 | CA2126246A1 Plastic fluid duet, in particular for convecting a vehicle fuel tank to the vehicle engine |
| 05/10/1994 | US5309691 Shear connected structural units |
| 05/05/1994 | DE4238697C1 Application for ribbed thermoplastics fluid pipe - is cut in sections with rib of each section fitting and engaging in fluid pipe coupling, rib acting as retainer engaging coupling cut section |
| 05/04/1994 | EP0595693A1 Metal jacket subjected to high temperature gradients |
| 05/04/1994 | CN2163922Y Anticorrosive compound tube |
| 04/28/1994 | WO1994009303A1 Corrugated multilayer tubing having at least one fluoroplastic layer |
| 04/28/1994 | WO1994009302A1 Corrugated multilayer tubing having at least two dissimilar polymeric materials |
| 04/28/1994 | DE4235825C1 Faserarmiertes Kunststoffrohr Faserarmiertes plastic pipe |
| 04/27/1994 | EP0593449A1 Plastic pipe with a wall made up of a plastic-filler layer. |
| 04/27/1994 | CN2163284Y Compounded metal pipe |
| 04/27/1994 | CN1024369C Fibre-reinforced concrete special-shaped pipe |
| 04/26/1994 | US5305797 Compartmented conduit tube construction |
| 04/20/1994 | EP0592732A1 Liquid transfer tube |
| 04/20/1994 | EP0592639A1 Secondary containment flexible underground piping system |
| 04/20/1994 | CN2162574Y Compound ventilating duct with glass fibre reinforced plastic honeycomb board |
| 04/13/1994 | CN2161796Y Helix tube with double layers wall |
| 04/06/1994 | EP0489137B1 Production pipe having an integrated hydraulic line |
| 04/05/1994 | US5300338 Polyhexamethylene adipamide layer superimposed on a polymer layer of carbon monoxide and alpha olefin; interactive adhesion |
| 04/05/1994 | US5299541 High-pressure fuel injection tube for diesel engine |
| 04/05/1994 | CA1328234C Spiral-wound tube |
| 03/31/1994 | WO1994007071A1 Manufacture of helically corrugated conduit |
| 03/30/1994 | EP0589800A1 Plastic lined dual containment piping system |
| 03/30/1994 | EP0439596B1 Bactericidal and fungicidal material for use in the manufacture of air-conditioning ducts |
| 03/29/1994 | US5298299 Double wall fire proof duct |
| 03/29/1994 | US5297896 Environmentally safe underground piping system |
| 03/29/1994 | CA1328040C Fabricating helical flowline bundles |
| 03/23/1994 | EP0587660A1 Laminated pipe and a process for making the same. |
| 03/23/1994 | CN2159484Y Composite heat isolating air pipe for vehicle |
| 03/16/1994 | EP0586729A1 Plastic laminates made from thermoplastics and unsaturated polyester resins or epoxy resins |
| 03/16/1994 | EP0539429B1 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 |
| 03/09/1994 | EP0585465A1 Double-walled construction of composite material tube, method for manufacturing the same, and device therefor |
| 03/09/1994 | EP0433440B1 Pipe connection for advance working pipes laid underground by an advance working technique |
| 03/02/1994 | EP0584898A1 Impact beam for a door of a motor vehicle |
| 03/02/1994 | CN1083194A Steel pipe with hardened wear-proof inner wall and machining device thereof |
| 03/01/1994 | US5290498 Ultra-high molecular weight polyethylene thin-wall pipe, and method of and apparatus for manufacturing the same |
| 02/23/1994 | EP0583596A1 Drainage pipe |
| 02/23/1994 | CN2157382Y High antiageing polyolefin plastics pipe |
| 02/17/1994 | DE4320183A1 Cooling air distribution system for conditioning ship's hold - has fans to blow air through series of segmented ducts on hold wall whose outlets lead to partitioned feeders passing air beneath floor |
| 02/16/1994 | EP0434791B1 Composite plastic pipe |
| 02/16/1994 | EP0357658B1 An elongate hollow element |
| 02/15/1994 | US5286309 Electric-resistance-welded steel pipe with high strength |
| 02/10/1994 | DE4226021A1 Ships noise damping appts. partic. for warship - has fluid conducting tube coated with single or multiple layer damping to absorb noise |
| 02/08/1994 | US5285008 For use in well operations |
| 02/08/1994 | US5284184 Corrugated multi-layer tubing having at least one fluoroplastic layer |
| 02/08/1994 | CA2103686A1 Drainage pipe |
| 02/02/1994 | EP0581595A2 Pipe for water or gas |
| 01/30/1994 | CA2101603A1 Pipe for watery liquid or gas |
| 01/26/1994 | EP0580271A2 Drill pipe |
| 01/25/1994 | US5281053 Underground tubular structural system and process for producing it |
| 01/25/1994 | CA2097366A1 Drill pipe |
| 01/18/1994 | CA1326215C Insulated pipe apparatus |