Abstract: HFW steel pipe has a series of advantages, such as high precision of outside size, good homogeneity of wall thickness, costeffectiveness and high efficiency. Its application extends into a number of areas of seamless steel pipe. HFW steel pipe developed by Yangzhou Steel Pipe Company is a technological leader in the key production processes like edge milling, forming and high-frequency contact welding process. The edge milling machine adopts the tilting cylindrical cutting tool. The cutter has a diameter of 850mm. FFX forming technology can easily adjust the type of steel pipe with a reasonable structure. The new-type double electrode contact welding equipment can adjust pressure in an elastic way to reduce the scars caused by the electrode on the surface of steel pipe and prevent the electrode from being damaged. Based on the market demands and optimization of product categories, the company has completed development and production of various steel pipes dedicated to special applications, such as casings for ore pulp transmission, lowtemperature stations, low yield ratio, anti-acid steel pipes for ultra-high voltage electric transmission tower, X70M high-quality steel pipe and expandable casings. They filled the domestic blanks in many application areas of HFW steel pipes.

Key words: HFW steel pipe, pipe manufacturing process, edge milling, forming, high-frequency welding, pipes for special purposes

摘要： HFW 钢管与无缝钢管相比, 具有外观尺寸精度高、壁厚均匀性好、成本低、生产效率高等优势, 应用领 域逐渐延伸。扬州钢管公司研发的高品质HFW 钢管, 在关键生产工序中的铣边、成型、高频接触焊工艺方面技术领 先。铣边机采用倾斜式圆筒切削工具, 切削刀直径850mm; FFX 成型技术实现粗成型段轧辊的完全兼用, 结构合理, 钢管调型简单易行; 新型双电极接触焊设备, 采用弹性方式进行压力调整, 降低电极对钢管表面的划伤, 防止电极损 坏。公司根据市场需求, 努力优化产品种类, 完成一系列特殊领域用管的研发和批量生产, 包括K55 材质低屈强比石 油套管、低温站场管、矿浆输送管等, 填补了国内HFW 钢管应用领域多项空白。

关键词: HFW 钢管; 制管工艺; 铣边; 成型; 高频焊接; 特殊领域用管