METHOD OF OPERATION OF CRYOGENIC PIPE LINES AND CRYOGENIC PIPE LINE Russian patent published in 2001 - IPC

FIELD: cryogenic engineering; transportation of cryogenic fluids. SUBSTANCE: after manufacture of cryogenic pipe line and building-up working pressure in heat-insulated cavity of warmed-up cryogenic pipe line, its outer casing is warmed up by means of greenhouse effect; working pressure is maintained in cavity by means of auxiliary evacuation facilities; evacuation is discontinued after reduction of pressure in cavity; then heat-insulated cavity is brought into communication with chemical cartridge of new construction. Chemical cartridge has metal housing with external heat-insulating coat and hermetic capsule with connecting branch pipe located inside this housing; thermal tube is mounted in hermetic capsule of chemical cartridge; filter is mounted inside hermetic capsule on surface of thermal tube; filter forms cavity where nondeliquscent chemical absorbent communicated with vacuum heat-insulating cavity by means of connecting branch pipe is located; hermetic capsule is connected with device transforming solar light energy into thermal energy at one-way transfer of heat. EFFECT: increased time between overhauls; reduced operational expenses and power requirements; reduced losses of cryogenic fluid during transportation; high fire safety. 6 cl, 3 dwg