FIELD: pipe calibration.
SUBSTANCE: invention relates to a lubrication ring (6) for a mechanical expander for calibration of large diameter pipes. The mentioned lubricating ring (6) contains a ring (12) made of steel, in particular structural steel, and holes for the fluid are provided in the ring (12). The lubricating ring (6) contains an additional part (13), which is manufactured using additive manufacturing technology and together with the ring (12) forms a lubricating ring (6), and the specified additional part (13) contains a Common Rail system (14) passing along the perimeter for supplying lubricant.
EFFECT: simplified and reproducible manufacturing of a lubricating ring for the distribution and direction of the expander oil is provided and a reduction in the size of structural elements for the manufacture of large diameter pipes with diameters of no more than 14 inches.
5 cl, 4 dwg
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