FIELD: metallurgy.
SUBSTANCE: method involves casting of hollow ingots by electroslag remelting, boring and turning them into ingots-billets, heating in a reheating furnace, drawing of ingots-billets on a trolley, blowing with compressed air, lubricating ingots-billets inside, from two ends, by a mixture of graphite with table salt, rolling them at a Pilger mill on taper mandrels to re-rolled hot-rolled pipes, segmentation of technological waste, straightening in a six-roll straightening machine with rolling heating temperature, austenitizing, cutting to two pipes of equal length, machining to pipe billets and rolling of machined pipe billets at CRM mill into commercial pipes with following heat treatment.
EFFECT: reduced expensive metal consumption, reduced roughness of outer and inner surfaces of pipes, improved productivity and increased lengths of pipes, reduced cost provided by regulation of processing modes at all stages of production.
2 cl, 1 tbl
