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    Φ1 422 mm×38.5 mm X80鋼級鋼管理化性能研究

    Study on Physiochemical Properties of Φ1 422 mm×38.5 mm X80 Steel Pipe

    • 摘要: 對比分析國內5家鋼廠鋼板及其制造的鋼管的理化性能，研究了用于四類地區(qū)天然氣管道項目的Φ1 422 mm×38.5 mm X80鋼級直縫埋弧焊鋼管的理化性能。研究結果表明，生產的Φ1 422 mm×38.5 mm X80鋼級直縫埋弧焊管管體屈服強度為555～674 MPa，抗拉強度為625～711 MPa，-10℃沖擊功平均值376.4 J，-5℃下DWTT剪切面積百分比平均值91%，各項性能指標均達到四類地區(qū)、壓力為12 MPa鋼管的技術要求，說明我國已經具備了工業(yè)化批量生產大直徑超大壁厚直縫埋弧焊管的能力。

       

      Abstract: Based on the comparative analyses of the physiochemical properties of the steel plates and the steel tubes as made separately by five domestic steel works,a study is conducted on the physiochemical properties of the Φ1 422 mm×38.5 mm X80 LSAW steel pipes as used for the natural gas pipeline projects of Class Four areas,and thus the property level of the said tubes is systematically mastered.The study result shows the test data of the tube,i.e.,the tube body yield strength:555~674 MPa;tensile strength:625~711 MPa;average impact energy at -10℃:376.4 J;and the average DWTT shear area value at -5℃:91%.All the property indexes of the tube have been up to the applicable technical requirements as specified for the said tube to service in Class Four areas with 12 MPa pressure,which means that the domestic steel tube industry has had the capacity to engage in industrialized massive production of the large-sized,ultra heavy-wall LSAW pipe.

       

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