Rubber joint has many different names. It can also be called a general in a flexible rubber joint, soft rubber joints, rubber expansion joint, rubber joints.As the name implies, It  is a kind of used for joint on the pipe connection. Its material is rubber, equiping with a flange, the clamp and other parts at the same time.Because the rubber has many excellent properties, such as scalable, high temperature resistance, corrosion resistance.Therefore,  It is widely used in petroleum, rubber joint water supply, drainage, electricity, fire, health and other fields.So in practice,  how to choose the suitable rubber joint?

The first thing to consider is the size of the rubber joint, only size appropriate, when installation to be successful.In general rubber joint of DN nominal diameter is 32 mm - 3000 mm, length L90mm - 500 - mm, will vary according to the actual needs.

Secondly,We must  to know rubber joint work pressure.There are three: the widespread use of 1.0 Mpa, 1.6 Mpa, 2.0 Mpa.Digital work on behalf of the greater the pressure, the greater the also is able to withstand the internal and external pressure.If the actual work in the pipeline pressure instantly become bigger, so we should choose pressure higher than the standard to deal with this situation.

Finally, we want to know the rubber joint connection. Generally ,It has  flange connection, clamp connection and threaded connection.Installing a rubber joint, it is strictly prohibited to joint displacement and deflection of the ultra limit, otherwise can cause unrecoverable damage to the rubber joint.If the actual need of displacement is greater than the standard displacement, it should be solved by increasing the joint.

And there are many requirements in practical applications, such as medium is water or oil pipeline, pipeline need acid or alkali resistance, pipe need to withstand high or low temperatures, etc.In a word, must according to the actual situation to choose suitable rubber joint.