DIFF Subgroup
F16L 17/063 Full Title
Joints with packing adapted to sealing by fluid pressure > with sealing rings arranged between the end surfaces of the pipes or flanges or arranged in recesses in the pipe ends or flanges
F16L 17/063 Joints with packing adapted to sealing by fluid pressure > with sealing rings arranged between the end surfaces of the pipes or flanges or arranged in recesses in the pipe ends or flanges