FIELD: pipeline transport.
SUBSTANCE: invention relates to the field of pipeline transport and is used in the construction of pipelines, including main pipelines, transporting viscous and easily solidifying products (oil, gas), as well as during underground and aboveground laying of heating networks, heating mains, process pipelines, operated at coolant temperature from +50 °C to +400 °C. Combinations of n-layers in the device are successively made of reinforcing layers in the form of fibreglass and a high-temperature non-combustible heat-insulating coating in the form of non-combustible ultra-thin heat insulation with a thermal conductivity coefficient of 0.001 W/(m⋅°C) based on hollow microspheres, total thickness of n-layer of non-combustible ultrathin heat insulation from 1.0 to 4.0 mm, made from water-suspension composition with viscosity from 1 to 100 Pa⋅s, containing a mixture of polymer binder 5-95 vol.% with hollow microspheres 5-95 vol.%, as polymer binder composition contains water-based polymer latex composition containing from 10 to 90 vol.% (co)polymer and from 10 to 90 vol.% of mixture of water and surfactant, as hollow microspheres, the composition contains microspheres with different sizes from 10 to 500 mcm and different bulk density from 50 to 650 kg/m3.
EFFECT: invention makes it possible to maintain process temperature of pumped fluids, preventing formation of deposits, in conditions of cooling effect of environment; reduce heat loss during transportation of liquids; provide the minimum required thickness of the heat-insulating layer; possibility of heat insulation with surface heating temperature up to +400 °C; non-combustible properties and manufacturability.
1 cl, 2 dwg, 1 tbl
