Rohr oder Rohrteil aus thermoplastischem Werkstoff

Quiet sewage piping to reduce sound transmission and radiation

Abstract

Waste water piping, or tubular mouldings, e.g. pipe fittings suitable for sewerage systems, are extruded, injection moulded or blow-moulded. They are made of polyolefin or polystyrene, incorporating an additive to reach a density of 1.4 - 2.7 g/cm<3>. The tubes or tubular mouldings have an original combination of properties, i.e. the wall thickness is 1/32 of the outer diameter at most, and the length per metre does not exceed 3 kg.

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Patent Citations (3)

    Publication numberPublication dateAssigneeTitle
    DE-8718020-U1November 05, 1992Wavin B.V., Zwolle, Nl
    EP-0342181-A1November 15, 1989POLOPLAST Kunststoffwerk GmbH & Co KGPlastic pipe or pipe fitting
    EP-0386517-A1September 12, 1990Friatec Aktiengesellschaft Keramik- und KunststoffwerkeConduit

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    Publication numberPublication dateAssigneeTitle