PRODUCTION OF 299×10-60 mm SEAMLESS HOT-ROLLED PIPES FOR STEAM BOILERS, STEAM PIPELINES AND MANIFOLDS OF PLANTS WITH HIGH AND SUPERHIGH STEAM PARAMETERS FROM ESR INGOTS OF "10Х9МФБ-Ш"-GRADE STEEL Russian patent published in 2014 - IPC B21B19/04 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy. This process can be used at PRU with Pilger mills for production of commercial pipes sized to299×16-60 mm, rerolled pipes sized to 377×22 и 325×20 mm for further rerolling to commercial pipes sized to 299×10-15 mm at mill "ХПТ" 450. Proposed method comprises ESR casing of billets, their mechanical processing, that is, turning to billets-ingots and drilling 100±5 mm diameter central bore. They subjected to heating to ductility temperature, piercing at helical rolling mills to sleeves, their rolling at Pilger mills to commercial pipes sized to 299x16-60 mm, heat treatment, etching, straightening, ultrasound control and acceptance.

EFFECT: production of the entire size spectrum at one works, higher mechanical properties, adequate geometrical sizes.

2 cl, 2 tbl