午夜爱爱免费视频无遮挡,免费视频爱爱太爽了激情,男女无遮挡XX00动态图120秒

<strike id="q9ggp"></strike>
      <th id="q9ggp"><video id="q9ggp"></video></th>
      <th id="q9ggp"><video id="q9ggp"></video></th>
    1. Acceptable manufacturing routes for PSL 2 pipe

      發布時間:2011.11.17 新聞來源:直縫鋼管_大口徑直縫鋼管_厚壁鋼管_高頻焊接鋼管-河北美德鋼管制造有限公司 瀏覽次數:

      Acceptable manufacturing routes for PSL 2 pipe
      Table 3

      Type of pipe Starting material Pipe forming Pipe heat treatment Delivery condition
      SMLS lngot, bloom or billet As-rolled -- R
      Normalizing forming -- N
      Hot forming Normalizing N
      Quenching and tempering Q
      Hot forming and cold finishing Normalizing N
      Quenching and tempering Q
      HFW Normalizing-rolled strip Cold forming Heat treatinga of weld area only N
      Thermomechanical-rolled strip Cold forming Heat treatinga of weld area only M
      Heat treatinga of weld area and stress relieving of entire pipe M
      Hot-rolled strip Cold forming Normalizing N
      Quenching and tempering Q
      Cold forming followed by hot reducing under controlled temperature resulting in a normalized condition -- N
      Cold forming followed by thermomechanical forming of pipe -- M
      SAW or COW pipe Normalized or normalizing rolled strip or plate Cold forming -- N
      As-rolled, thermomechanical-rolled, normalizing-rolled or normalized Cold forming Normalizing N
      Thermomechanical-rolled strip or plate Cold forming -- M
      Quenched and tempered plate Cold forming -- Q
      As-rolled, thermomechanical-rolled, normalizing-rolled or normalized strip or plate Cold forming Quenching and tempering Q
      As-rolled, thermomechanical-rolled, normalizing-rolled or normalized strip or plate Normalizing forming -- N
      a   See 8.8 For applicable heat treatments.
      上一篇:金屬(直縫鋼管)的鈍化處理
      本文共分 1

       

      午夜爱爱免费视频无遮挡,免费视频爱爱太爽了激情,男女无遮挡XX00动态图120秒