FIELD: power industry.
SUBSTANCE: heat insulating coating for steel tube elements includes liquid-ceramic base with glass microspheres with diameter of 15-150 mcm and fillers. Liquid-ceramic base consists of non-flammable inorganic components including the following (wt %): 0.4-0.6 aerosil, 6-8 expanded perlite, 5-7 β-eucryptite with negative coefficient of thermal expansion, 0.8-1.2 ground mica, 2-4 silicon and/or titanium oxides, 18-20 glass microspheres and 62.5-64.5 binding agent in the form of liquid soda or potassic glass. Coating is 4-12 mm thick. Every 4-5 mm of coating includes at least 3 layers of reinforcing net.
EFFECT: invention allows increasing service life of the coating and reducing adverse effect on human body and environment.
1 cl, 1 dwg
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