Roving from glass basalt complex strings it is intended for reception of fabrics of various structure and density, pasting heat-insulated cords, reinforcing of composite materials -basalt plastics a various structure (further under the text - roving).

Roving represents the continuous lock consisting of set number of complex strings, located in parallel each other. During manufacture on a complex string it is put lubricant the set structure. Depending on nominal diameter of an elementary fiber it is made roving following marks: RB-9 and RB-12.

The nominal linear density of complex strings in roving depends on nominal diameter of elementary fibers and their quantity and makes for mark РБ-9 - (38 ± 6,5) teks, for РБ-12 (55 ± 10). The nominal linear density roving is defined as product nominal linear density of a complex string and quantity of complex strings in roving.

On physicomechanical parameters roving should correspond to the requirements resulted in table.

The name of a parameter	Norms for marks		Maximum deviations
	RB-9	RB-12
Diameter of an elementary fibre, micron	9,0	12,0	+2/-1
Specific breaking load, not less	375,0	280,0
Mass fraction of a moisture, %, no more, on lubricants: - "paraffin emulsion" - № 76	1,0 1,5	1,0 1,5
Mass fraction of the substances deleted at burning, %, not less	1,0	1,0

By the order of consumers roving from glass basalt strings can be issued with diameter of elementary fibers боле 14 microns. Limiting diameters of an elementary fibre lay within the limits of from 8 up to 25 microns.