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                                                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.
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