Rigid pipes

Child Classifications

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• F16L 9/003
• F16L 9/006
• F16L 9/01 of wood (F16L9/16 - F16L9/22 take precedence)
• F16L 9/02 of metal (F16L9/16 - F16L9/22 take precedence)
• F16L 9/08 of concrete, cement, or asbestos cement, with or without reinforcement (F16L9/16 - F16L9/22 take precedence)
• F16L 9/10 of glass or ceramics, e.g. clay, clay tile, porcelain (F16L9/16 - F16L9/22 take precedence)
• F16L 9/12 of plastics with or without reinforcement (F16L9/16 - F16L9/22 take precedence)
• F16L 9/14 Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups (F16L9/16 - F16L9/22 take precedence)
• F16L 9/16 wound from sheets or strips, with or without reinforcement
• F16L 9/17 obtained by bending a sheet longitudinally and connecting the edges
• F16L 9/18 Double-walled pipes; Multi-channel pipes or pipe assemblies
• F16L 9/21 made of sound-absorbing materials or with sound-absorbing structure
• F16L 9/22 Pipes composed of a plurality of segments