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Tongzhan S.,Henan Tianfon Steel Structure Co. | Huan D.,Henan Tianfon Steel Structure Co. | Zhimin X.,Henan Tianfon Steel Structure Co. | Xilin N.,Henan Tianfon Steel Structure Co. | Jiancheng Y.,Henan Tianfon Steel Structure Co.
Welding Journal | Year: 2011

A project that involved constructing a bridge to span the Xinxiang Wei river, steel box girders were fabricated using ceramic backing and flux cored arc welding with CO 2 shielding (FCAW-G) for one- sided welding. The FCAW-G process with CO 2 shielding addressed the problem of incomplete fusion sometimes associated with a solid welding wire process. According to the construction site conditions, in order to meet the schedule, adapt to the construction conditions at the site and improve the production rate of the plant, it was decided to moduli the bridge sections, which included segmenting into 7 sections from 16 segments. Quality control was conducted throughout the manufacturing process and measures were taken to configure appropriate equipment for wind and moisture prevention on the site. It was proved that CO 2 flux cored welding with ceramic backing is a good welding technology for on- site butt joint welding for bridge construction as well as other applications.

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