Flexible rubber expansion joint also known as shock absorber, pipeline shock absorber, rubber shock absorber, soft joint, is the flexible connection of metal pipeline, by the inner rubber layer, nylon cord fabric enhancement, outer rubber layer composite rubber ball and loose metal flange. Flexible rubber expansion joint is characterized by high pressure resistance, good elasticity, large displacement, balance pipe deviation, absorption of vibration, good noise reduction and easy installation.Flexible rubber expansion joint widely used in chemical, construction, water supply, drainage, petroleum, light heavy industry, refrigeration, sanitation, water heating, fire protection and other basic projects.