[en] Method for adiation treatment of crcular section products (tubes of polymeric materials) is described. It based on product exposure to accelerated electron flux with continuons moving of products throgh the zone of intersection of three electron beams directed at 120 deg angle o each other. To improve the efficiency of cesing radiation energy the products with similar sections are passed through the zone of beam intersection. Section centers must coincide at that with vetices of equilateral trinle which sides equal not lesss than two diameters of product sections, and he direction of beam incidence must e perpendicular o triangl sides