STEEL PIPE WITH PLASTIC LINING Russian patent published in 2005 - IPC

FIELD: pipe-line transport, may be applicable in production of pipes and construction of pipe-lines transporting aggressive madia.

SUBSTANCE: inside the ends of the pipe lined by a plastic envelope concentrically arranged fastened to it are the outer and inner bushes. The outer bush is made of the pipe metal and is double-stage in the outside diameter. The stage of the smaller diameter of this bush is positioned in the zone of lining, and the stage of the larger diameter - between the end faces of the lining and pipe. The inner bush length exceeds that of the outer and is made of corrosion-resistant steel, a sealing ring is installed between the lining and the inner bush. The inner end of the inner bush may be made with annular shoulder on the outside surface, and the sealing ring is positioned between the annular shoulder and the end face of the outer bush. The outer end of the inner bush may be made with an annular shoulder on the outer surface.

EFFECT: enhanced serviceability of the pipe.

5 cl, 3 dwg