| Patents for F16L 9 - Rigid pipes (18,006) |
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| 06/15/1999 | US5911715 Guide catheter having selected flexural modulus segments |
| 06/15/1999 | US5911457 Method for producing a double-walled structure |
| 06/09/1999 | EP0791158B1 Furnace superheater and a fluidized bed reactor provided with a furnace superheater |
| 06/09/1999 | CN2323226Y Ribbed pipe |
| 06/09/1999 | CN2323225Y Pipe with composite wear-resistant liner |
| 06/09/1999 | CN1219180A Process for preparation of creep-resistant polypropylene block copolymers |
| 06/09/1999 | CN1218885A Composite tube |
| 06/03/1999 | WO1999027228A1 Tool cooling system |
| 06/02/1999 | EP0919757A2 Pipe having a plastic coating |
| 06/02/1999 | DE19750959A1 Metallisches Rohr Metallic tube |
| 06/02/1999 | CN1218161A Winded steel-plastic composite materials for pipelines |
| 06/01/1999 | US5908679 Pipe of polyethylene having improved mechanical properties |
| 06/01/1999 | US5908049 Spoolable composite tubular member with energy conductors |
| 05/27/1999 | WO1999026007A1 Improved pipe for conveying fluids such as petroleum products |
| 05/27/1999 | WO1999025967A1 Metal pipe |
| 05/27/1999 | CA2305660A1 Improved pipe for conveying fluids such as petroleum products |
| 05/26/1999 | CN2320866Y Overcoating steel pipe for buried heating pipe |
| 05/26/1999 | CN1217444A Wound type steel-plastic composite pipeline material |
| 05/26/1999 | CN1217443A Tubelike body made of fiber-reinforced composite material |
| 05/25/1999 | US5907134 Air gap-insulated exhaust pipe and process for manufacturing same |
| 05/25/1999 | US5906400 Galvanic corrosion protection system |
| 05/20/1999 | WO1999024749A1 Articles having reduced resistance to fluid flow |
| 05/19/1999 | EP0916054A1 Multiple-layer pipe |
| 05/19/1999 | CN2319657Y Clean keeping zinc-plating water pipe |
| 05/19/1999 | CN2319656Y Glass reinforced plastic stainless steel compound pipe |
| 05/19/1999 | CN2319655Y Pipe material made of plank |
| 05/18/1999 | US5904185 Under internal pressure |
| 05/18/1999 | US5904182 Methods and apparatus for providing quartz glass connectors |
| 05/12/1999 | DE19749447A1 Automotive double-walled seam-welded exhaust pipe |
| 05/12/1999 | CN2318491Y Compound plastic pipe |
| 05/12/1999 | CN2318490Y Anti-rub pipe for boiler |
| 05/11/1999 | US5901739 Cover assembly with integral securing apparatus for covering undersink piping |
| 05/06/1999 | EP0912853A1 Fluoropolymer tubes and methods of making same |
| 05/06/1999 | EP0912330A1 Laminated fuel and vapor return lines |
| 05/06/1999 | EP0912325A1 Fiber-reinforced resin pipe having improved impact resistance |
| 05/06/1999 | EP0912318A1 Method for making a product to be extruded, and an extruder |
| 05/06/1999 | EP0912316A2 A method and an apparatus for manufacturing an extruded plastic product, and a plastic product |
| 05/05/1999 | CN2317378Y Reinforced attractive rigid rubber pipe |
| 05/05/1999 | CN2317377Y Composite corrosion-resisting industrial pipeline |
| 05/05/1999 | CN2317376Y Heat insulating non-combustion ventilating duct for ventilator |
| 05/04/1999 | US5899238 Polyfluoroorgano composites and method for making |
| 04/28/1999 | EP0910768A1 Multi-layer tubing assembly for fluid and vapor handling systems |
| 04/28/1999 | CN1215366A Method and apparatus for manufacturing an extruded plastic product, and a plastic product |
| 04/28/1999 | CN1215364A Method and apparatus for prepairing an extrudable product, and an extruded product |
| 04/27/1999 | US5897537 Guide catheter having a plurality of filled distal grooves |
| 04/22/1999 | WO1999019658A1 Tubing coupling and a method for producing the same |
| 04/22/1999 | WO1999019653A1 Composite spoolable tube with sensor |
| 04/21/1999 | EP0909233A2 Extrusion method, extruder and extruded product |
| 04/21/1999 | EP0792429A4 High-pressure fiber reinforced composite pipe joint |
| 04/21/1999 | EP0686246B1 Piping element for burried conduit, corresponding burried conduit, and method for manufacturing said piping element |
| 04/21/1999 | CN2315404Y Preburried pipeline device for prestressed steel bundle |
| 04/21/1999 | CN2315403Y Anti-static plastic pipe |
| 04/15/1999 | DE19745192A1 Pipe connecting method for e.g. engine manifold |
| 04/14/1999 | EP0908656A1 Tubular article used as a valve seat |
| 04/14/1999 | EP0908300A2 Method for reducing crush initiation forces in composite structures |
| 04/14/1999 | EP0907854A2 Improved vehicle including freeze stress resistant fluid conducting apparatuses |
| 04/08/1999 | WO1999017049A1 Method for protecting the inner surface of a duct using a polymeric material |
| 04/08/1999 | WO1999017048A1 Fire-resistant sound-proof pipe |
| 04/08/1999 | WO1999017047A1 Sound-proof pipe member |
| 04/08/1999 | DE19745599A1 Pipe for use in the floor |
| 04/08/1999 | DE19743970A1 Pipe for aggressive waste water |
| 04/07/1999 | EP0907049A2 Interface system between composite tubing and end fittings |
| 04/07/1999 | CN2313137Y Metal-reinforced plastic composite tube |
| 04/06/1999 | US5891373 Process of making a multi-layer tube |
| 04/06/1999 | CA2145408C Apparatus and method for the production of thermoplastic pipe or tubing |
| 03/31/1999 | EP0905427A2 Liquid- and gas-sealed tube |
| 03/31/1999 | CN1212342A 不锈钢复合管 Stainless steel composite pipe |
| 03/31/1999 | CN1042706C Method for manufacturing continuous coiled tubing and coiled tube |
| 03/30/1999 | US5887628 High pressure fuel injection pipe for diesel internal combustion engine |
| 03/25/1999 | WO1999014526A1 Sound-proofing tubular member |
| 03/24/1999 | EP0903416A1 Application of a copper alloy for plumping pipes |
| 03/24/1999 | EP0745201B1 Hollow reinforcing members and composites containing the same |
| 03/24/1999 | EP0740754B1 Petrol supply tube |
| 03/23/1999 | US5884672 Multi-layer fuel and vapor tube |
| 03/23/1999 | US5884671 Thermoplastic resins |
| 03/18/1999 | WO1999013271A1 Chimney-pipe and manufacture of same |
| 03/18/1999 | WO1999013125A1 A device, a drill member and a method for masking the member at thermo chemical surface treatment |
| 03/18/1999 | DE19741035C1 Sanitary or heating pipe |
| 03/18/1999 | CA2303332A1 A device, a drill member and a method for masking the member at thermo chemical surface treatment |
| 03/18/1999 | CA2271575A1 Pipe coupling |
| 03/16/1999 | US5881775 Heat exchanger tube and method for making |
| 03/16/1999 | US5881442 Apparatus for making a double-walled structure |
| 03/11/1999 | WO1999011961A1 Tube made up of shells placed on top of one another |
| 03/11/1999 | WO1999011960A1 Corrosion- and fire-resistant pipe system |
| 03/11/1999 | DE19751051A1 Kaminrohr und Verfahren zum Herstellen eines solchen Chimney pipe and method for manufacturing such a |
| 03/11/1999 | DE19549505C2 Flexible sleeve, eg for supplying gas into home |
| 03/10/1999 | EP0900913A1 Drillstring |
| 03/10/1999 | EP0683845B1 Drill pipe |
| 03/10/1999 | CN1210487A 挤压机 Extruder |
| 03/10/1999 | CN1210219A Method and apparatus for manufacturing and orangizating plastic tunnel with steel net |
| 03/10/1999 | CN1210044A Carbon steel pipe with inner and outer corrosionproof stainless steel coatings and production thereof |
| 03/09/1999 | US5878786 Otangular fitting family for flat-oval duct systems and method for making same |
| 03/04/1999 | WO1999010675A1 Pipeline manufacture |
| 03/04/1999 | WO1999010554A1 Steel alloy for compound tubes |
| 03/03/1999 | EP0899494A1 Fluid transporting pipes and methods of making them |
| 03/03/1999 | EP0670774B1 Multiply polymer pipe |
| 03/03/1999 | CN1209389A Synthetic resin tube and extruding device for mfg. of same |
| 03/02/1999 | US5876548 Flexible metal pipes with a shrinkable polymer sheath, a process for their fabrication, and their utilization as flexible tubular conduits |
| 02/26/1999 | CA2212290A1 Ovax (anti-ovalization pipe) |
| 02/25/1999 | WO1999009230A1 Heating furnace tube, method of using the same, and method of manufacturing the same |