METHOD OF MANUFACTURE OF HEAT-INSULATING MEMBER OF PIPE LINE Russian patent published in 2003 - IPC

FIELD: heat insulation of pipe lines. SUBSTANCE: proposed method includes placing protective sheet material over inner surface of mold before pouring heat-insulating material which is made in form of semi-cylinder of lesser diameter; then heat-insulating material is poured in gap between protective coats and article thus obtained is subjected to steaming; used as sheet protective coat is material on base of thermoplastic organic binder and gas-concrete mix is used as heat- insulating material. EFFECT: enhanced efficiency of waterproofing over outer and inner surfaces. 3 cl, 2 dwg