X70钢级φ1016mm×17.5mm螺旋缝埋弧焊钢管

X70,φ1016mm×17.5mm SAWH Steel Pipe

为满足西气东输管道工程等天然气长输管线对于大口径、大壁厚X70螺旋埋弧焊管的需求,华油钢管有限公司开发出了X70钢级ф1016mm×17.5mm螺旋埋弧焊管新产品,实现了国产化。产品各项技术指标均满足西气东输工程相关技术标准的要求,其中,钢管管体横向的屈服强度平均为529MPa,抗拉强度平均为645MPa,管体横向的夏比冲击功平均值大于300J(-10℃),焊缝夏比冲击功平均值163J(-10℃),热影响区夏比冲击功平均值204J(-10℃),DWTT剪切面积平均为100%(0℃)。研发出高钢级、大口径、大壁厚螺旋钢管低应力成型技术、焊接技术、专用焊材开发等一系列创新技术,并形成了规模化生产能力。该产品已经成功应用于西气东输管道工程、陕京二线、西气东输二线管道工程等天然气长输管道,钢管的各项技术指标满足了管道要求。

To satisfy the need for large-diameter and thick-wall X70 SAWH used for long-distance natural gas pipelines like the West-East gas pipeline project,Huayou Steel Pipe Co Ltd developed a new product---X70φ1016mm×17.5mm SAWH steel pipe.This product is localized and meets the requirement on the related technological standards of the West-East gas pipeline project.Of those standards,the transverse-to-pipe-axis yield strength averages 529MPa while the tensile strength averages 645MPa.The average value of TPA Charpy impact energy is higher than 300J(-10℃),the average value of weld Charpy impact energy 163J(-10℃),the average value of heat-affected zone Charpy impact energy 204J(-10℃),and DWTT shear area averages 100%(-10℃).The company also developed a series of new technologies,such as high steel grade,large-diameter and thick-wall low-stress forming technology,welding technology and dedicated welding materials,establishing the capacity for mass production.This product has been successfully used for long-distance natural gas pipelines,such as the West-East gas pipeline,the Shaanxi-Beijing gas pipeline and the second West-East gas pipeline.All the technological indexes of the steel pipe meet the requirements of the pipeline.