with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings (F16L21/06, F16L21/08 take precedence; if adjustability is essential F16L27/00)

Full Title

Joints with sleeve or socket (F16L13/00, F16L17/00, F16L19/00 take precedence; connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics F16L47/00; specially adapted for pipes of brittle material F16L49/00) > with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings (F16L21/06, F16L21/08 take precedence; if adjustability is essential F16L27/00)

Child Classifications

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• F16L 21/022
• F16L 21/025 Rolling sealing rings
• F16L 21/03 placed in the socket before connection ( F16L21/025 take precedence)
• F16L 21/035 placed around the spigot end before connection ( F16L21/025 take precedence)
• F16L 21/04 in which sealing rings are compressed by axially-movable members
• F16L 21/05 comprising a first ring being placed on a male part and a second ring in the sleeve or socket