Rigid pipes

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F16Engineering elements F16LPIPES JOINTS OR FITTINGS FOR PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING MEANS FOR THERMAL INSULATION IN GENERAL

F16L9/00Rigid pipes

F16L9/003with a rectangular cross-section F16L9/006specially profiled F16L9/01of wood F16L9/02of metal F16L9/04Reinforced pipes F16L9/042the reinforcement comprising one or more layers of a helically wound cord, wire or strip F16L9/045using profiled strips F16L9/047comprising reinforcement rings F16L9/06Corrugated pipes F16L9/08of concrete, cement, or asbestos cement, with or without reinforcement F16L9/085Reinforced pipes F16L9/10of glass or ceramics F16L9/105of glass F16L9/12of plastics with or without reinforcement F16L9/121with three layers F16L9/123with four layers F16L9/125electrically conducting F16L9/127the walls consisting of a single layer F16L9/128Reinforced pipes F16L9/133the walls consisting of two layers F16L9/14Compound tubes F16L9/147comprising only layers of metal and plastics with or without reinforcement F16L9/153comprising only layers of metal and concrete with or without reinforcement F16L9/16wound from sheets or strips, with or without reinforcement F16L9/165of metal F16L9/17obtained by bending a sheet longitudinally and connecting the edges F16L9/18Double-walled pipes Multi-channel pipes or pipe assemblies F16L9/19Multi-channel pipes or pipe assemblies F16L9/20Pipe assemblies F16L9/21made of sound-absorbing materials or with sound-absorbing structure F16L9/22Pipes composed of a plurality of segments