FIELD: construction and repairing pipe lines. SUBSTANCE: device has C-shaped housing 1 with roller bearings 2,3,4, ring rotor 5 with holders 6,7 of rolls and mechanism 8 for braking rolls, and roll bearing 9 and 10 of drive 12. Housing 1 is provided with suspension 14 with shoe 15 for fixing housing 1 to pipe line 11. Rotor 5 has joints 19 and 20 that are in coincidence with the plane of joints 21 and 22 of housing 1 and suspension 14. The device is mounted on pipe line 11 via roll bearings 9 and 10. Suspension 14 is passed under pipe line 11 and is secured to housing 1 by threaded members 16. EFFECT: improved design. 3 dwg
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