FIELD: construction.
SUBSTANCE: in a metal pipe with an internal plastic pipe and a thrust bushing made of a metal pipe lined with a plastic pipe, ends of the plastic pipe are at the distance from the ends of the metal pipe and are fixed by bushings, where the novelty is the fact that the plastic pipe at one side is fixed with an insert from corrosion-resistant steel, remaining inside the metal pipe, and at the other side by the internal end of the shell from the corrosion-resistant steel, with which the thrust bushing is plated inside, at the same time the thrust bushing protrudes beyond the end of the metal pipe and serves to cover the welded joint from the pipeline cavity. Besides, the thrust bushing and the metal pipe are sealed from the pipe cavity by a seal from elastic resilient material.
EFFECT: simplified technology of pipes connection with an internal plastic pipe with the help of electric arc welding in process of pipeline assembly and increased quality of protection against corrosion of welded joints of a pipeline.
2 cl, 1 dwg
