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)

Child Classifications

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• F16L 21/002
• F16L 21/007
• F16L 21/02 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)
• F16L 21/06 with a divided sleeve or ring clamping around the pipe ends (flanged joints F16L23/00; couplings of the quick-acting type F16L37/00)
• F16L 21/08 with additional locking means (F16L21/06 takes precedence; couplings of the quick-acting type F16L37/00)