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    管線用鋼管外徑精度的控制

    CONTROL OF O.D. TOLERANCE OF STEEL PIPE FOR PIPE LINE PURPOSE

    • 摘要: 熱軋機組生產一次成形的鋼管,外徑精度一般在±0.75%范圍內,而對用于對焊連接的鋼管,要求的外徑公差控制范圍更加嚴格。通過孔型設計,可使熱軋管的外徑公差范圍控制在±0.50%,同時管端外徑偏差控制在-0.40mm~+1.59mm,從而滿足了使用要求。

       

      Abstract: For steel tube made by a hot-rolling mill with one working process, its O.D. tolerance is typically ±0.75%, whereas for steel tube subjected to butt-welding connection, its O.D. tolerance is much stricter than that of the former. With proper groove design, it is possible to get O.D. tolerance of hot-rolled tube controlled within ±0.50%, while tube end O.D.deviation is limited to-0.40 mm~+1.59 mm, being satisfactory to requirements for relevant application.

       

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