FIELD: metallurgy.
SUBSTANCE: invention relates to production of cold-rolled seamless pipes with size 426×20-22 mm. Pipes production is carried out of stock pipe billets of 474×25×3,700-3,900 mm size obtained by mechanical processing: boring and turning of stock hot-rolled pipes of 490×42×7,400-7,800 mm size, rolled at PRM 8-16" with Pilger mills from hollow ESR ingot-billets of 650×inner. 300×2100±50 mm.
EFFECT: reduced metal consumption, reduced roughness of outer and inner pipe surfaces and increased length of pipe.
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