| 摘要 |
FIELD: machine building.SUBSTANCE: in metal pipes the ends of plastic pipes are fixed by an insertion from corrosion resistant steel and by a corrosion resistant steel shell of a backing bush, a flexible elastic sealing gasket is set between the backing bush and the metal pipe. The insertion end is protruding beyond the butt end of a plastic pipe and a sealant is placed in the gap formed by the insertion and the metal pipe end in the place where there is the end of the backing bush not protected by the corrosion resistant steel shell, the sealant provides for the adhesion of the joint of the backing bush, metal pipe and the corrosion resistant steel insertion as well as of the joint of the insertion butt ends and the corrosion resistant steel shell.EFFECT: improved reliability of corrosion protection for the zone near welded seams of pipes in a pipeline.2 dwg |
