HEAT INSULATED JOINT OF PREVIOUSLY HEAT INSULATED PIPES WITH POLYMER SHELL, METHOD OF ITS ASSEMBLY, POLYMER COUPLING AND METHOD OF ITS MANUFACTURING Russian patent published in 2010 - IPC F16L59/18 F16L58/00 

FIELD: construction.

SUBSTANCE: joint includes polymer coupling covering ends of polymer shells of adjacent pipes. Between outer surfaces of pipe shell ends covered with coupling and inner surface of coupling ends there is a sealant placed. Heat insulation material fills coupling space. Edges of coupling are protected by operational band of flexible connections with separate fixation or tapes fixed by lock. Coupling is formed by cutting of its billet from polymer pipe after heating, stretching by increase of inner diametre and cooling of the latter. On inner surface of coupling ends sealant is installed, which is closed from the outside by safety element. In process of joint assembly prior to coupling ends setting, package, safety element and temporary plug are removed. After setting, sealant material that came out from under the edge of polymer coupling is formed onto cone by application of mount bandage.

EFFECT: simplified design, improved quality, reliability.

26 cl, 23 dwg