This can greatly reduce the vibration and noise of the pipe system, interface that can solve all kinds of pipe displacement, axial extension and misalignment problems. According to the different materials can be made of acid and alkali-resistant, corrosion-resistant, oil resistant, heat-resistant varieties, adapted to a variety of media and the environment. Material is polar rubber, good sealing performance, light weight, easy installation and maintenance, long service life, but avoid contact with sharp metal instrument, so as not to puncture the ball. Aerial can be fitted with elastic supports, tightening up when installing bolts to the flange. If the line pressure is too high, limit bolt flanges on both ends together. High pressure PTFE lining for strong acid strong alkali and other corrosive media.