GLASS-FIBRE-PLASTIC TUBE-CASING WITH HEATING Russian patent published in 2010 - IPC F16L53/00 

FIELD: machine building.

SUBSTANCE: here is disclosed glass-fibre plastic tube-casing with heating. The tube-casing consists of a glass-fibre plastic tube-casing proper with thermo-insulating and hydro-insulating layers, of resistive electric heaters with low temperature outputs connected to power supply by means of current conducting wires and of resistive electric heaters made in form of current conducting fabric. The latter consist of conducting heat-generating threads arranged parallel to end electrodes out of tinsel threads and distanced from the electrodes with electro-insulating threads. Additional and current conducting electrodes are arranged perpendicular to conducting heat-generating threads and to tinsel threads of end electrodes along length of the resistive electric heater. The resistive electric heaters in form of a horse cloth are uniformly laid along generatrix of an item; also current conducting and additional electrodes out of tinsel threads are laid along a cylinder of the item and are placed in an internal power casing. Notably, electro-insulating layers of glass cloth directly contacting the resistive electro-heaters are preliminary impregnated with epoxy-phenol varnish, while all successive and preceding layers of glass cloth and thermo-protective and anti-static tissue are impregnated with thermo-resistant binding, for example on base of poly-glycidol derivative of chlorine containing aromatic amine.

EFFECT: increased functionality under low temperature.

3 dwg