CONNECTION OF METAL PIPES

摘要

FIELD: machine building.SUBSTANCE: connection consists of two pipes welded with each other and a metal bushing arranged inside featuring a cylindrical groove provided in the central portion and annular grooves in the end-face areas and anticorrosion coating on the surface except the cylindrical groove, with heat-insulation material and setting stops in the cylindrical groove, with sealing elements in the annular grooves and sealing material in a gap between pipes and the bushing. A split ring made of non-combustible heat-insulation material is used as the insulation material. A split metal ring with protrusions in the form of a semi-sphere and air volume under the protrusions is used as the setting stops. The split metal ring is installed upon the split ring of non-combustible heat-insulation material and its ends are interconnected by spot welding. The rubber rings featuring end-face surfaces and protruding fins of different height are used as the sealing elements in the annular grooves. A welding seam connects the metal pipes with the split metal ring. A relation of thickness of the split metal ring and the wall thickness equals 1:(3-5). The height of the metal ring protrusions exceeds its thickness.EFFECT: invention increases reliability of the joint.4 dwg