FIELD: connections or fittings for pipes and hoses.
SUBSTANCE: invention relates to devices for connecting corrugated spiral couplings for connection of cable-conducting pipes. Corrugated spiral coupling for connection of cable conducting pipes consists of two layers. Outer layer consists of frost-resistant plastic. Inner layer is waterproof and represents a nonwoven material including an absorbent and water-swelling filler. Inner layer represents a closed contour in cross section. Coupling layers represent a non-detachable structure produced by connection of external and internal layers of the coupling in hot state under pressure.
EFFECT: increasing the service life of the coupling by increasing its reliability.
4 cl, 4 dwg, 1 tbl
