Flexible rubber expansion joint, which also named vibration absorber, compensator, connecting hose and so on, is a pipeline connection with high elasticity, high-pressure sealing, mediator endurance, and weather resistance.

It's features are:

1.small in size, light weight, good elasticity， convenient installation and maintenance.

2.There' ll be horizontal, axial, angular displacement when installing, without restrictions of pipe blocking and flange unbalance.

3.Structure transmission noise can be reduced when it is working and it has a strong cushioning ability and so on.

4.High-pressure ruber joints in high temperature, acid oil pipelines are more effective in preventing the erosion of corrosive medium on the rubber joint, so they can improve service life.

5.Flexible rubber expansion joints, which is widely used in supporting pipelines of various industries, have a good overall performance.

Flexible rubber joints can be divided into many types. Different types of rubber joints are needed in different operating environments. Sometimes rubber joint also need the  protection device. For example, if the main pipeline is in the underground, the installation position of rubber joint is also in the underground. It will need the protection device: flexible rubber joint underground guard.

The flexible rubber joint is embedded with a protective device, which has sufficient space on the periphery, and will not affect the movement of the rubber joint. Besides, the rubber joint can be isolated from the external filling soil, and the pipe can slide freely at both ends of the device without any resistance. After the installation of the pipeline, through backfilling rammed, ground is still as smooth as before. Vehicles running, stacking heavy objects or installing equipment will not be affected.The buried device is a combination of two hollow semi-circulars devices, all the rubber joints and pipe welding flanges are loaded into the body, and two semicircular small flat strips of steel are installed at both ends to ride on the flanged outer wall pipes of both sides. The device is equipped with a certain number of bolts for assembly. Its installation method is: the installation of rubber joint - Painted Antirust paint for the inside of protection device - installed in lower 1/2 protection - 1/2 protection device on the upper - tighten locking bolt to make the rubber joint (Installation notes that to ensure rubber joint located in the center of the device) - protection device outer coating antirust paint - backfill soil and tamp soil, stone and cushion layer, laying on the ground (Making a permanent marks in proper place, it is better to make sure the position when needs repairing).

If make a good anti-corrosion paint on the surface when is installing, generally it can be used for more than 30 years.