METHOD OF MANUFACTURE AND CONNECTION OF PIPES WITH INTERNAL CEMENT-SAND COATING

摘要

FIELD: machine building. ^ SUBSTANCE: thin-walled bushings out of corrosion resistant metal are positioned inside ends of pipes so, that external ends of bushings project beyond ends of pipes; projecting ends of bushings are flanged on ends of pipes; bushings are fixed by mutual calibration of bushings and pipe ends by internal diametre; coating is applied and prepared ends of pipes are butt-welded according to process of two-layer metal weld. ^ EFFECT: raised reliability of pipe connection. ^ 4 cl, 3 dwg