| Patents for F16L 9 - Rigid pipes (18,006) |
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| 02/07/1998 | CA2182763A1 Pipe section especially for use in pipelines carrying abrasive or corrosive materials |
| 02/05/1998 | WO1998004861A1 Multiple-layer pipe |
| 02/04/1998 | CN2273798Y Stainless-steel composite tubular products |
| 02/03/1998 | US5713423 Drill pipe |
| 02/03/1998 | US5713392 Low friction slip-sleeve pipe wrap |
| 01/29/1998 | DE19630268A1 Pipeline length for underground laying |
| 01/28/1998 | EP0616671B1 Composite metal tube and method of making the same |
| 01/22/1998 | WO1998002687A1 Fluoropolymer tubes and methods of making same |
| 01/22/1998 | CA2260221A1 Fluoropolymer tubes and methods of making same |
| 01/21/1998 | CN1171149A High pressure fiber reinforced composite pipe joint |
| 01/21/1998 | CN1171148A Polyamide- and polyelefin-based ducts for transporting and/or distributing gas |
| 01/20/1998 | US5709029 Manufacture of helically corrugated conduit |
| 01/15/1998 | WO1998001694A1 Multi-layer tubing assembly for fluid and vapor handling systems |
| 01/15/1998 | DE19715327A1 Method of forming end ring on cast iron pipe |
| 01/15/1998 | CA2260009A1 Multi-layer tubing assembly for fluid and vapor handling systems |
| 01/14/1998 | CN2272517Y Wearing-resisting diffusion pipe for slag discharging |
| 01/13/1998 | US5706866 Pipe member for buried conduit with corrosion protection and process therefor |
| 01/13/1998 | US5706864 Corrugated, multilayer |
| 01/08/1998 | WO1998000662A2 Improved vehicle including freeze stress resistant fluid conducting apparatuses |
| 01/07/1998 | EP0816770A2 Pipe insert lining to build in wall openings |
| 01/07/1998 | EP0816062A1 Thermoplastic resin laminate |
| 01/07/1998 | EP0814917A1 Fluoropolymer composite tube and method of preparation |
| 01/07/1998 | CN2272089Y Over-length ring seal fine pipe |
| 01/07/1998 | CN2272088Y 抗静电pvc管 Antistatic pvc pipe |
| 01/06/1998 | US5704537 Method for sheathing a plastic tube with a metal sheathing |
| 12/31/1997 | CN2271649Y Hot water running water pipe |
| 12/30/1997 | US5701929 Cover assembly having rapid installation features for covering undersink piping |
| 12/24/1997 | WO1997048932A1 Pipe insulation |
| 12/24/1997 | WO1997040658A3 Extrusion method, extruder and extruded product |
| 12/24/1997 | CN1168456A Method and mould for producing air hose of nonmetal-base composite material |
| 12/23/1997 | US5699835 Multi-layer plastic hollow pipe |
| 12/11/1997 | DE19622247A1 Pipe for pipe conductors with pipe body made from non-conducting material |
| 12/10/1997 | EP0811041A1 Method of dyeing polyester and polyester-containing textile materials |
| 12/10/1997 | CN2270148Y Splice inserted incombustible thermal insulation blast pipe of glass fibre reinforced plastics |
| 12/10/1997 | CN2270147Y 复合塑料管 Composite plastic pipe |
| 12/03/1997 | EP0809726A1 Protective sleeve with warp spacers |
| 12/03/1997 | CN1166584A High-strength pipe for fishing tackle and its production technology |
| 12/02/1997 | US5693284 Forming two-layer hollow tube by blow molding, hardening, filling with core material, injecting glass fiber reinforced resin between tube and mold to form third layer |
| 11/27/1997 | WO1997044186A1 Laminated fuel and vapor return lines |
| 11/27/1997 | CA2253222A1 Laminated fuel and vapor return lines |
| 11/26/1997 | EP0778797A4 Manufacture of internally enhanced welded tubing |
| 11/26/1997 | CN2268823Y Energy saving casing for pipelines |
| 11/20/1997 | DE19619957A1 Pipes for drinking water treatment, drainage wells, irrigation or water=wheels comprising quartz sand and poly:urethane binder |
| 11/19/1997 | CN2268167Y Metal compound tube |
| 11/19/1997 | CN2268166Y Downpipe |
| 11/13/1997 | WO1997042443A1 Fire resistant sprinkler coupling |
| 11/13/1997 | WO1997042270A1 Fire-resistant plastic laminates |
| 11/13/1997 | WO1997042023A1 Fiber-reinforced resin pipe having improved impact resistance |
| 11/13/1997 | WO1997037830A3 A method and an apparatus for manufacturing an extruded plastic product, and a plastic product |
| 11/13/1997 | CA2253251A1 Fiber-reinforced resin pipe having improved impact resistance |
| 11/12/1997 | EP0805744A1 Hot melt fluidized cladding of innerduct liner |
| 11/12/1997 | CN2267369Y Permeable blind pipe |
| 11/11/1997 | US5685344 Composite metal and method of making the same |
| 11/06/1997 | WO1997041571A1 Multi-layer reinforced and stabilized cable construction |
| 11/06/1997 | WO1997041376A1 Pressure tube of a plastic material |
| 11/06/1997 | WO1997040658A2 Extrusion method, extruder and extruded product |
| 11/06/1997 | DE19617592A1 Brandgeschützte Kunststoffschichtkörper Fire-retardant plastic laminate |
| 11/06/1997 | CA2253318A1 Multi-layer reinforced and stabilized cable construction |
| 11/06/1997 | CA2250697A1 Extrusion method, extruder and extruded product |
| 11/05/1997 | EP0804700A1 Elongated fuel and vapor tube having multiple layers and method of making the same |
| 11/05/1997 | EP0804699A1 Plastics pipe |
| 11/05/1997 | EP0606349B1 Helically wound reinforced ribbed composite structure |
| 11/05/1997 | CN2266681Y Internal lining wear-resistant bent tube |
| 11/05/1997 | CN2266674Y Gas-filling bag for producing steel and rubber compound tube |
| 11/05/1997 | CN2266673Y Heavy-calibre, multi-layer seamless rubber-lined steel and rubber compound tube |
| 11/05/1997 | CN1163996A Multi-layer plastic pipe and pipe joint thereof |
| 11/04/1997 | US5683767 Shrinkage |
| 11/04/1997 | US5682926 Channel system with a cross-section with rounded corners and method for manufacturing elements therein |
| 11/04/1997 | US5682635 Bridge and road construction and method of removing worn deck structure |
| 10/30/1997 | WO1997040080A1 Process for the preparation of creep-resistant polypropylene block copolymers |
| 10/23/1997 | DE19615935A1 Method of transporting natural gas in plastics pipelines |
| 10/21/1997 | US5678611 Multi-layer fuel and vapor tube |
| 10/16/1997 | WO1997037832A1 Method for making a product to be extruded, and an extruder |
| 10/16/1997 | WO1997037830A2 A method and an apparatus for manufacturing an extruded plastic product, and a plastic product |
| 10/16/1997 | WO1997037829A1 Method and apparatus for preparing an extrudable product, and an extruded product |
| 10/16/1997 | DE19635986A1 Moulded flexible tube or hose with parallel peripheral grooves e.g. for protection of electrical conductors |
| 10/16/1997 | CA2250424A1 Method and apparatus for preparing an extrudable product, and an extruded product |
| 10/15/1997 | EP0801258A2 Coupling between a member and a pipe shaped conduit element |
| 10/14/1997 | US5676176 Corrugated pipe formed by electric welding of ferrite type stainless steel; automobile exhaust systems |
| 10/08/1997 | EP0628143B1 Channel system with a cross-section with rounded corners |
| 10/08/1997 | CN1161423A Reinforced pressure plastic hose, and joint therefor |
| 10/08/1997 | CN1036091C Pipe material made from plastic alloy double-composite modified reinforced fiber glass and mfg. method thereof |
| 09/30/1997 | US5671779 Exhaust pipe structure in outboard engine system |
| 09/30/1997 | US5671649 Method of making protective sleeve with warp spacers |
| 09/25/1997 | WO1997035135A1 A conduit |
| 09/24/1997 | EP0796407A1 Pipe assembly |
| 09/24/1997 | EP0746716B1 Cold-formable composite pipe |
| 09/18/1997 | WO1997034101A1 Improvements in or relating to bi-metal lined pipe |
| 09/17/1997 | EP0795710A1 Corrugated conduit for pressurized medium |
| 09/17/1997 | EP0795100A1 Flexible high pressure pipe |
| 09/17/1997 | EP0764248A4 Interlocked plastic-encased concrete pipe |
| 09/17/1997 | CN1159370A Method to cold-bend resin-coated ribbed steel pipes and resin-coated ribbed steel pipes bent by such method |
| 09/12/1997 | WO1997033127A1 Fire retardant reinforced plastic duct system |
| 09/12/1997 | WO1997033117A1 Multilayer pipe |
| 09/12/1997 | WO1997033116A1 Multilayer pipe |
| 09/11/1997 | DE19609217A1 Cladding assembly for pipework in building |
| 09/10/1997 | EP0794376A1 Composite tube comprising a sleeve with a copper-intermediate layer and an inner and outer skin layer |
| 09/10/1997 | CN1159220A Fuel transporting pipe |
| 09/10/1997 | CN1158948A Fluid conduit systems and methods for making |
| 09/10/1997 | CN1158947A Multilayer fluid conduits |