PERMANENT JOINT OF PIPES AND METHOD OF ITS MAKING Russian patent published in 2005 - IPC

FIELD: mechanical engineering; making and repair of permanent joints of steel and polymeric pipes.

SUBSTANCE: proposed permanent joint of pipes includes steel pipe and polymeric pipe with strengthener enclosing working part of steel pipe by its working part, and metal sleeve. Steel pipe is made in form of length of pipe with welded-to mounting ring. End face part of ring, inner surface of length of steel pipe and surface of its working part are provided with polymeric coating. Sleeve is welded to mounting ring. Working part of polymeric pipe with strengthener in form of longitudinal members uniformly spaced over circumference and spiral members wound on with preset putch and welded in places of intersection by tap welding, it welded to polymeric coating of working part of steel pipe section which, in its turn, is welded to steel pipe. Description of method of connection of pipes is provided.

EFFECT: improved sealing and increased reliability of joint.

3 cl