David G. Kilburn, The Lincoln Electric Company, USA, describes how new GMAW equipment enables faster line speeds and high quality product at the pipe mill. An advanced, automated two step welding process allows fabrication crews at United Spiral Pipe LLC to produce high quality, large diameter, helical-submerged-arc-welded (SAVVH) spiral pipe at fast speeds for the oil and gas industry. A joint venture between US Steel, SEAH and POSCO, the pipe mill, located in Pittsburg, California, can produce 300 000 t of pipeline annually, using a process consisting of one forming line and three welding lines. The spiral pipe produced at the mill, using A252- through X80 grade steel with wall thicknesses from 0.25 to one inch, feature outside diameters ranging from 24 - 64 in.
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机译：美国林肯电气公司的David G. Kilburn介绍了新型GMAW设备如何在管轧机上实现更快的生产线速度和高质量的产品。先进的自动化两步焊接工艺使United Spiral Pipe LLC LLC的制造团队能够为石油和天然气行业快速生产高质量，大直径的螺旋埋弧焊（SAVVH）螺旋管。这家位于美国加利福尼亚州匹兹堡的钢管厂是由US Steel，SEAH和POSCO共同组建的合资企业，该管道厂使用一条成型线和三条焊接线组成的工艺，每年可生产30万吨管道。工厂使用A252至X80级钢生产的螺旋管，壁厚为0.25至1英寸，外径为24-64英寸。
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