METHOD OF MANUFACTURE OF PIPE Russian patent published in 2003 - IPC

FIELD: manufacture of plastic articles; manufacture of long-cut biplastic pipes. SUBSTANCE: proposed method includes placing load- bearing flange on reinforcing member, beading end of inner sealing layer and securing beaded end between load-bearing flange and hold-down flange followed by heat treatment and building-in pipe components. Load- bearing flange is made from polyethylene which is beaded after preliminary heating after which savilen layer is applied on its end face or on end face of hold-down flange and beaded end of polyethylene layer is secured between flanges, after which heat treatment is performed terminating in building in savilen together with hold- down flange and end face of beaded polyethylene layer. EFFECT: extended field of application. 2 cl, 1 dwg