| Patents for F16L 57 - Protection of pipes or objects of similar shape against external or internal damage or wear (3,889) |
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| 04/22/1992 | CN1016379B Lining laminate for pipeline and operation method thereof |
| 04/16/1992 | WO1992006055A1 Process for sealing cement-bound material surfaces in water-conveying systems |
| 04/16/1992 | DE4103528A1 Verfahren zur versiegelung zementgebundener werkstoffoberflaechen in wasserfuehrenden systemen A method for sealing cementitious werkstoffoberflaechen in water leading systems |
| 04/15/1992 | EP0480686A1 Method for reinforcing and repairing equipment details and components subjected to heavy abrasion wear |
| 04/14/1992 | US5104700 Fire protective device |
| 03/31/1992 | US5099889 External pipe protector |
| 03/26/1992 | DE4100603C1 Expansion comensator in power station - consists of pipe sections connected by external bellows and fitted with internal baffles |
| 03/18/1992 | EP0475328A1 Device to limit leakage in case of pipe rupture |
| 03/11/1992 | EP0474583A2 Plastic pipe to be laid in the ground |
| 03/11/1992 | EP0456660A4 Wear indicator for material transfer systems |
| 02/05/1992 | CN1015403B Protecting apparatus for tube end |
| 02/04/1992 | CA1295265C Wear resistant pipe |
| 01/14/1992 | US5079824 Method for the installation of a jacket reinforcement for piping |
| 01/08/1992 | EP0465150A1 Tape coatings |
| 01/07/1992 | US5078822 Method for making refractory lined duct and duct formed thereby |
| 01/07/1992 | US5078171 Method and apparatus for selectively enclosing a length of pipe |
| 12/31/1991 | US5077106 Fiber reinforced resin matrix; metal foil liners; adhesive secured; sealed against hostile environmental influences; space stations |
| 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 |
| 12/03/1991 | US5069485 Brittle lined pipe connector |
| 12/03/1991 | US5069297 Drill pipe/casing protector and method |
| 11/27/1991 | EP0458322A2 Double wall fire proof duct |
| 11/21/1991 | EP0456660A1 Wear indicator for material transfer systems. |
| 11/21/1991 | DE4014618A1 Bactericidal cement conduits etc., for waste water - made using residual dust and ashes from burning refuse, bound in elution resistant form |
| 11/12/1991 | CA1292085C Process and apparatus for continuously sheathing solid or hollow profiles, especially tubes, with an extruded foam jacket of thermoplastic synthetic resin, and products thereby produced |
| 11/12/1991 | CA1291954C Protective device for pipe ends |
| 11/06/1991 | EP0455357A1 Method of applying an internal coating to pipe and the product made thereby |
| 11/01/1991 | CA2015880A1 Internal pressure hose safety device |
| 10/31/1991 | CA2038683A1 Method of applying a polyolefin coating to pipe and the product made thereby |
| 10/29/1991 | US5060984 Short radius, low wear elbow |
| 10/22/1991 | US5058627 Freeze protection system for water pipes |
| 10/09/1991 | EP0450220A1 Method of renovating and/or protecting sewers or pipes |
| 10/03/1991 | WO1991014896A1 Pipeline and passageway lining materials |
| 10/01/1991 | US5052445 Pipe section, especially for abrasive and/or corrosive material pipelines |
| 09/19/1991 | WO1991013559A1 Improvements relating to the manufacture of tubular materials (tube without overlap) |
| 09/11/1991 | CA2077891A1 Manufacture of tubular materials (tube without overlap) |
| 09/03/1991 | US5044670 Pipe for conveying solid matter |
| 08/13/1991 | US5038856 Arrangement for the protection of tube sections of platen-like heat-transfer surfaces disposed in a gas conduit against wear by gases laden with solid particles |
| 08/06/1991 | US5037600 Method of applying a polyolefin coating to pipe |
| 07/31/1991 | EP0439279A1 Drill pipe/casing protector |
| 07/31/1991 | EP0438900A2 Tape coatings |
| 07/23/1991 | CA1286585C Method of, and elastomeric composition for protecting a substrate |
| 07/16/1991 | US5032633 Thermoplastic molding compositions with high cold impact strength |
| 07/04/1991 | DE4000027A1 Compensator for pipe temperature and pressure fluctuations - uses compression diaphragms fitted inside pipes |
| 06/29/1991 | CA2030185A1 Tape coatings |
| 06/25/1991 | CA1285232C Longitudinally-divided sleeve tube for cable sleeves |
| 06/20/1991 | DE3941739A1 Tube inner cladding - is inner tube bonded into place by explosive distortion |
| 06/19/1991 | EP0432714A1 Fire protection arrangement for temperature sensitive installations, in particular gas piping from lead and cable ducts |
| 06/18/1991 | US5024466 Wear-prevention structure for pneumatic conveying pipe elbow |
| 06/13/1991 | WO1991008372A1 Fire protected pipe and pipeline |
| 06/02/1991 | WO1991008417A1 Remotely controlled installation of linings in inaccessible sewer-pipe junctions and discharge entries |
| 06/02/1991 | CA2045689A1 Remotely controlled installation of linings in inaccessible sewer-pipe junctions and discharge entries |
| 05/29/1991 | EP0429426A1 Hose for the transport of highly abrasive materials |
| 05/14/1991 | CA1284043C Abrasion resistant braided steel |
| 05/02/1991 | WO1991006145A1 Safety device for protecting concealed wires and pipes |
| 04/24/1991 | EP0259373B1 Insulation and weight coating for subsea pipelines and method for production of the same |
| 03/20/1991 | CN2073526U Elastically protecting rings for exposed steel frames |
| 03/19/1991 | CA1281661C Double tubing comprising two protective tubes integrally joined to one another by a web |
| 03/06/1991 | EP0415690A2 Stress relief device |
| 02/26/1991 | US4995427 Pipe section, especially for abrasive and/or corrosive material pipelines |
| 02/13/1991 | EP0412303A2 Protection device for conduits installed on the floor |
| 02/05/1991 | US4990028 Anti-friction composition containing MgO and method |
| 01/23/1991 | CN1011332B Hood for pipe bending |
| 01/16/1991 | CN1011260B Enclosure for plastic pipeline |
| 01/09/1991 | EP0407266A1 Protective lining against heat and fire for pipes and similar elements having an elongated shape |
| 12/11/1990 | US4976288 Tubing bend for pneumatic conveying system |
| 11/13/1990 | CA1276117C2 Pipeline formed of pipe sections connected by elastic coupling elements |
| 11/07/1990 | EP0395646A1 Root-repelling pipe joints |
| 11/06/1990 | US4967799 Plastic abrasion-resistant protective sleeve for hose and method of protecting hose |
| 10/31/1990 | CN1010221B Anti-erosion protrusions for wear surfaces in fluid conduits |
| 10/30/1990 | CA1275617C Coated metal pipe having bending capability |
| 10/23/1990 | US4964440 Ribbed pipe |
| 10/16/1990 | US4962958 Lining laminate for a pipeline |
| 10/16/1990 | US4962839 Ducting for transporting granular or powder substances under gravity, in particular on sites having silos |
| 10/11/1990 | DE3911057A1 Curved, tubular part of a conveying system |
| 10/10/1990 | EP0390925A1 Crack growth limiter in high-pressure welded pipelines and method of making it |
| 10/09/1990 | CA1275057A1 Protective cap |
| 09/26/1990 | EP0388583A1 Low-temperature processable thermoplastic mouldings |
| 09/04/1990 | US4953294 Portable handheld tool having a drive shaft rotatably journalled in a protective tube |
| 08/09/1990 | WO1990008915A1 Wear indicator for material transfer systems |
| 07/31/1990 | US4944634 Lubricating tunnel walls around pipe to be installed with aqueous slurry of smectite clay and magnesium oxide |
| 07/26/1990 | DE3901618A1 Pipeline bend |
| 06/13/1990 | EP0372300A1 Arrangement for protecting tube sections of plate-like heating surfaces in ducts against wear caused by gases charged with solid particles |
| 06/06/1990 | EP0371057A1 Polymeric tape with biocide. |
| 05/31/1990 | DE3840144A1 Pipe or hose coupling |
| 05/29/1990 | US4929478 Protective fabric sleeves |
| 05/10/1990 | DE3837888A1 Screw connection for fastening exchangeable, wear-resistant, panel-like coverings |
| 05/01/1990 | US4921125 Support assembly |
| 04/24/1990 | US4918894 In an insulated structure |
| 04/11/1990 | CN2055894U Protective cover for conduit |
| 04/04/1990 | CN1007451B Protective sleeve for covering material for pipe |
| 03/28/1990 | EP0359988A2 Sealing connection between two curved wals with transition to a straight wall |
| 03/22/1990 | DE3831188A1 Surface seal for, in particular, steel structures, concrete structures or the like |
| 03/21/1990 | CN1007288B Double tubing comprising two protective tubes integrally joined to one another by web |
| 03/14/1990 | CN1040424A Crack arrester for high-pressure welded pipelines and method of producing same |
| 03/07/1990 | CN1007083B Moist type wrapping cloth made from plastic coated glassfibre and its mfg. method |
| 02/22/1990 | WO1990001671A1 Crack growth limiter in high-pressure welded pipelines and method of making it |
| 02/14/1990 | EP0354632A2 Fire protected foamed polymeric materials and filler compositions |
| 02/13/1990 | US4900383 Lining interiors and exteriors with protective coating |
| 01/30/1990 | CA1264912A1 Longitudinally divided sleeve of shrinkable material |