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The Flange and the Body part are manufactured by anti-wearing, seawater-resistance, and ozon-resistance with the same quality and designed to be correspondent with in diameter of the pipe.
As the metal flange is attached in the both inlets of hose, you can finish the connection just with flange parts of the pipe and bolting work.
Moreover as the flange part is consisted to be restrained in the both ends or be restrained and be free, it is a distinctive feature that the bolting work is very easy.
This is widly used in large dredger needed high pressure or in the place with severe working condition.