| Patents for F16L 9 - Rigid pipes (18,006) |
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| 07/25/1990 | EP0379088A2 Plastic strip for making tubes |
| 07/25/1990 | EP0250278B1 Filler and buoyancy material, method for its production and tubular constructions incorporating this material |
| 07/24/1990 | US4942922 Welded corrosion-resistant ferritic stainless steel tubing having high resistance to hydrogen embrittlement and a cathodically protected heat exchanger containing the same |
| 07/24/1990 | US4942907 Intake manifold |
| 07/18/1990 | EP0151930B1 Method of manufacturing a tubular element and compound tube obtained by said method |
| 07/17/1990 | US4942070 Thermoplastic polymer, crystal structure |
| 07/11/1990 | EP0377382A1 Method for integrating a metallic sleeve in a tube of a wrapped composite material |
| 07/11/1990 | CN1008781B Pipeline cable for use under water |
| 07/05/1990 | DE3943248A1 Duplex-metallrohr zur daempfung Duplex metal pipe for damping |
| 07/05/1990 | DE3843719A1 Line element for a round duct for channelling gaseous media |
| 07/04/1990 | EP0375992A1 Process for preparing pipes from composite materials based on epoxy resins and bis[1(2'aminoethyl)-1,3-diaza-cyclopenten-2-yl-2]-heptane-1,7 |
| 07/04/1990 | CN1043551A Indoor drainage pipe and its manufacture |
| 06/27/1990 | EP0375039A1 Method for the manufacture of pipe from strip steel |
| 06/27/1990 | EP0374667A1 Process and installaton for making a composite pipe in a rotating mould |
| 06/27/1990 | CA2006449A1 Process for 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 |
| 06/26/1990 | US4936006 Method of making prestressed concrete articles |
| 06/23/1990 | CA2006518A1 Method and apparatus for producing a composite pipe in a rotating drum |
| 06/22/1990 | CA2006445A1 Conduit assembly for reception of cables |
| 06/19/1990 | US4934412 Layers of reinforced cured polyimide resin with an inner layer of foil |
| 06/05/1990 | US4930544 Double-containment thermoplastic pipe assembly |
| 05/30/1990 | EP0370147A1 Tubular composite construction |
| 05/30/1990 | CN1008208B Compound steel pipe with fully covered plating |
| 05/29/1990 | US4929294 Offshore oil drilling |
| 05/16/1990 | EP0368487A1 Welded corrosion-resistant ferritic stainless steel tubing and a cathodically protected heat exchanger containing the same |
| 05/15/1990 | US4925622 Treadable insulation system with lagging support |
| 05/15/1990 | US4925218 Double-walled pipeline system |
| 05/10/1990 | DE3937371A1 Leitungskanal Duct |
| 05/10/1990 | DE3936472A1 Flexible plastics, water pipes system - has pipes laid in spirals around central support tube |
| 05/09/1990 | CN2056877U Long and thin wall shape tube made of oxygen-free copper |
| 05/08/1990 | US4923751 Seamless metal-clad fiber-reinforced organic matrix composite structures, and process for their manufacture |
| 05/03/1990 | DE3837161A1 Advancement pipe for advancing from vertical shafts |
| 04/18/1990 | EP0363384A1 Plastic tube with solid cross-ribs on the outer surface, a moulding device therefor; installation comprising such a device and a method for moulding a plastic tube |
| 04/17/1990 | CA1267983A1 Poly(vinylidene fluoride) composition having an improved behaviour when contacted with hydrocarbons; its use for producing oil industry tubing |
| 04/11/1990 | EP0362919A2 Extruded radially stretched plastic pipe and procedure for manufacturing such a pipe |
| 04/11/1990 | CN1007550B Fabricating helical flowling bundles |
| 04/11/1990 | CN1007496B Complex pipe, its mfr. method and heat pipe using the pipe |
| 04/10/1990 | US4915425 Pipe connecting element |
| 04/04/1990 | EP0361639A2 Bar-like molding made of fiber-reinforced plastic material and method of manufacturing the same |
| 04/04/1990 | EP0361580A2 Extruded biaxially stretched foam plastic pipe and procedure for the manufacture thereof |
| 03/28/1990 | EP0360758A2 Method for producing conduit parts of plastics, an inorganic filler and glass fibres by centrifugal casting, and conduit part produced by this method |
| 03/27/1990 | CA1267097A1 Plastic pipe |
| 03/22/1990 | WO1990002649A1 Extruded biaxially stretched foam plastic pipe and procedure for the manufacture thereof |
| 03/22/1990 | WO1990002648A1 Extruded radially stretched plastic pipe and procedure for manufacturing such a pipe |
| 03/21/1990 | EP0358852A1 Device for transporting a fluid |
| 03/21/1990 | CN2054862U Thin gapless foundry iron fume exhausting pipe and its fitting |
| 03/14/1990 | EP0358178A1 Multilayered plastic pipe and manufacture process therefor |
| 03/13/1990 | US4907624 Thermosetting resin pipe |
| 03/08/1990 | WO1990002286A1 Conduit liner assembly and method for installation |
| 03/08/1990 | WO1990002285A1 Spiral-wound tube |
| 03/08/1990 | DE3928269A1 Beschichtetes metallrohr und verfahren fuer dessen herstellung Coated metal pipe and process for its manufacture |
| 03/07/1990 | EP0357551A1 Plastic profile for tubings |
| 03/07/1990 | EP0356732A1 Internally oxidized tube |
| 03/07/1990 | CN1040258A Connecting method of composite pipe |
| 03/06/1990 | US4906496 Double-walled tube assembly |
| 02/27/1990 | US4903736 Hollow cylindrical body made from spirally wound extruded plastic strip material |
| 02/22/1990 | WO1990001653A1 Laminated pipe and tubing and method of making same |
| 02/21/1990 | CN1039755A Plastic coated steel tube |
| 02/20/1990 | US4901983 Blast pipe for metallurgical processes having refractory coated surfaces |
| 02/20/1990 | US4901415 Method for connecting composite pipes |
| 01/30/1990 | US4897140 Method for making a pipe-shaped body of wood |
| 01/25/1990 | WO1990000698A1 Means for and method of detecting and controlling pipeline leakages |
| 01/25/1990 | WO1990000696A1 Pressure-tube of vinylchloride plastic |
| 01/24/1990 | CN1006573B Improved pipe for building thermally insulated conduits and process for said building |
| 01/24/1990 | CN1006570B Method and equipment for wrapped forming and sealing of pipes |
| 01/16/1990 | CA1264447A1 Pipeline, a method of laying the pipeline and a device for effecting said method |
| 01/03/1990 | CN2050521U Steel combination pipe added with fixed ring |
| 12/28/1989 | WO1989012733A1 An exhaust silencer |
| 12/28/1989 | WO1989012732A1 An exhaust silencer and a method of manufacturing it |
| 12/27/1989 | EP0347962A2 Tube having a structure made from cement, method and machine for manufacturing it |
| 12/27/1989 | CN1006243B Composite pipe and method for mfg. the same |
| 12/21/1989 | DE3820152A1 Multilayered corrugated pipe, in particular for lining chimneys |
| 12/20/1989 | CN2049723U Buried corrosion-proof insulating pipe |
| 12/13/1989 | EP0346101A2 Plastic coated steel tube |
| 12/06/1989 | EP0345117A1 Duct for transporting by gravity granular or pulverulent products, especially at silo sites |
| 11/30/1989 | WO1989011318A1 Process for producing silicon caoutchouc tube membranes with mechanical wall reinforcement, development of tube membranes with mechanical wall reinforcement and their use |
| 11/30/1989 | DE3817560A1 Verfahren zur herstellung von rohrmembranen aus silikonkautschuk mit einer mechanischen wandverstaerkung, ausbildung von rohrmembranen mit einer mechanischen wandverstaerkung und anwendung dieser rohrmembranen Process for the manufacture of tubular membranes made of silicone rubber with a mechanical wandverstaerkung, training of tubular membranes with a mechanical wandverstaerkung and application of these tubular membranes |
| 11/23/1989 | EP0342802A2 Ducting |
| 11/23/1989 | DE3815843A1 Pipes and similar shaped parts consisting of concrete having a corrosion-resistant inner lining and having a partially flexible interconnection |
| 11/16/1989 | WO1989011056A1 Tubing collar |
| 11/15/1989 | EP0342181A1 Plastic pipe or pipe fitting |
| 11/15/1989 | CN1037201A The copper-clad-steel bimetallic tube and the preparation method thereof |
| 11/09/1989 | DE3820254A1 Plastic pipe |
| 11/09/1989 | DE3814176A1 Double-walled pipeline comprising a multiplicity of lengths of pipe which are connected to one another on the end sides |
| 10/25/1989 | EP0338908A1 Ventilating tube particularly for air conditioning installation of cars |
| 10/25/1989 | EP0338609A1 Gas flow line with conductor for switch-over on vehicles |
| 10/25/1989 | EP0338070A1 Treadable insulation system with lagging support |
| 10/24/1989 | CA1262410A1 Prefabricated drain-pipe with longitudinal joints |
| 10/11/1989 | CN1036151A New technique for making spray pipes without mould |
| 09/26/1989 | US4869766 Method for manufacturing large diameter plastic pipe |
| 09/26/1989 | US4869295 Profiled plastic band |
| 09/26/1989 | US4869294 Buried large cross-section conduit |
| 09/26/1989 | EP0332654A4 Method of and machine for winding tubes from strip. |
| 09/26/1989 | CA1260375A1 Composite pipes and process for manufacturing the same |
| 09/21/1989 | DE3821723C1 Multilayer motor vehicle pipe produced by coextrusion |
| 09/21/1989 | DE3815992A1 Device for channelling a flow medium |
| 09/20/1989 | EP0333532A1 Pipe made of composite materials having low sensibility for stretch changes due to internal pressure |
| 09/20/1989 | EP0333061A1 Method for producing a wound thermoplastic pipe |
| 09/20/1989 | EP0332654A1 Method of and machine for winding tubes from strip. |
| 09/19/1989 | US4867203 A method of relining or preparing sewage pipe using a plastic pipe comprising an outer corrugated pipe and a smooth inner wall |
| 09/13/1989 | EP0332481A1 Tubular branching pipe comprising noise absorbers |