FIELD: erecting pipe lines for transportation of process liquids. SUBSTANCE: fitted concentrically on end of pipe and fastened to it is protective bush. Sectional bush is assembled of rings mounted at spaced relation and fastened together. End edge of inner ring is shifted relative to outer one inside by 3 to 4 thicknesses of outer ring. Edge of outer ring is bent inside pipe at angle of 30 to 40 deg to its axis. EFFECT: enhanced reliability. 1 dwg
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