DIFF Subgroup
F16L 17/032 Full Title
Joints with packing adapted to sealing by fluid pressure > with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket > having annular axial lips
F16L 17/032 Joints with packing adapted to sealing by fluid pressure > with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket > having annular axial lips