Flexible connection flange for tubes with plastic inner lining, which is essentially characterized by having, according to a section cut in profile, the shape of an l with a small heel down located at the conjunction of both branches, of which the horizontally, a transverse groove is used at the bottom, where part of an elastic ring that peripherally embraces one of the tubes to be joined is housed, which has its interior covered by a hollow cylinder of plastic material, which is longer than the tube itself, forms an expansion that sectioned into a profile, takes the form of an inverted u, this part being supported by the rear area of the flange itself, under whose heel a second elastic peripheral joint is installed, in which the end of the outer tube abuts, that can be made of fiber cement, having foreseen that both the flange and the coupling system to the tube to be joined can vary without thereby changing the essentiality of the invention. (Machine-translation by Google Translate, not legally binding)
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