Basalt heat-insulated cords (BHC) consists of a core produced from basalt ultra-and superthin fibers and a braid of a core roving from basalt glass complex filaments or glass filaments.

Basalt heat-insulated cord - the highly effective material intended for thermal isolation of units, pipelines and heat-conducting systems of the general and special purpose in various branches of a national economy.
Cords are nontoxical also fireproof, a range of working temperatures: — With shield from glass filaments - 260 °С + 450 °С;
— With shield from basalt roving - 260 °С + 700 °С

Depending on diameter cords share for the marks resulted in tab. 13. Under the order of the consumer release of cords with other diameters is possible.

Mark	Diameter,mm	Limit deviation, mm
BHC-6	6	±1
BHC-10	10	±2
BHC-20	20	±2
BHC-30	30	±3
BHC-40	40	±3

Physicotechnical characteristics of cords should meet the requirements, resulted in tab. 14.

Marks	Linear density, g/m	Density, kg/m3
		Cords of special purpose	Cords of a general purpose, no more
BHC-6	16±2	440-620	700
BHC-10	23±2	210-400	450
BHC-20	60±4	170-230	250
BHC-30	100±8	120-160	190
BHC-40	170±13	115-140	170

Heat conductivity of cords, W / (m?К) should be no more, at:
при 298 К (25 °С) — 0,055
при 398 К (125 °С) — 0,072
при 573 К (300 °С) — 0,1

Sorption humidity of cords should be no more than 2 %. The Mass fraction of ions of chlorine in a cord should be no more than 0,03 %, and leachability (in recalculation on Na₂O), at the area of 300 sm² - no more than 5 mg.

Cords should be flexible, without breaks and stratifications. Materials which are applied to manufacturing cords, do not give in thermal destruction and do not allocate harmful substances under action of physical factors (temperature, ultra-violet and other kinds of radiations, etc.).