FIELD: metallurgy.
SUBSTANCE: rolling mill contains, as minimum, one rolling mill with at least two rolling rolls (1, 2) which jointly form circle (3) of tubular blank (4). During rolling process inside tubular blank (4) it is placed draw bar (5). Forming rolls (1, 2) in operation position and draw bar (5) form thickness of walls (d) of rolled pipe. For reduction of necessity in rods at keeping of quality of rolling by invention it is provided that vertical relative to longitudinal axis (L) cross section of draw bar (5) allows shape, differs from shape of circle. In addition invention relates to operation method of such rolling mill.
EFFECT: seamless pipes with equal thickness of wall.
12 cl, 7 dwg
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