What grades do the working pressure of the Rubber expansion section be divided?

Rubber expansion section as a hose installed in the pipeline only the pressure body, not only to withstand serious testing in all aspects, but also as a maintenance device to maintain the bellows, usually in understanding the specific pressure scale in the field pipeline, it is necessary to manufacture this, select one or many layers of stainless steel wire weaving. General rubber expansion joints work pressure is divided into 5 levels: 0.25, 0.6, 1.0, 1.6, 2.5Mpa.