FIELD: building.
SUBSTANCE: procedure consists in first preparing pressure-tight tubular element out of material impregnated with resin in flat state. Further, the first tubular element impregnated with resin is supplied into a tube forming device, wherein tubular layer impermeable for resin reinforced with rough canvas and possessing higher strength in the direction of warp, than in the direction of weft, is supplied into a tubular form, is sealed and is continuously unscrewed around the tubular element impregnated with resin so, that the tubular element is wrapped up at unscrewing. Prepared sleeve is used for trench-less restoration of existing pipelines.
EFFECT: fabrication of lengthwise reinforced sleeve of upgraded lengthwise strength.
