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国际上下向焊接工艺已广泛应用于长输管线压力钢管的焊接，由于该工艺设备简单，焊接速度快，效率高，质量好，适合于野外作业和低温环境下的焊接，因此在我国石油工业系统已得到了广泛的应用。在电力行业中，因受工艺习惯等因素的制约，目前下向焊接技术尚未得到推广应用。根据下向焊接工艺的特点及其优越性，它在电厂的地下管网和循环水等大直径薄壁管，以及厂房内的循环水、凝结水、工业冷却水和低压给水等外径为300mm以上管道焊接施工中，有着广阔的应用前景。
International up and down welding process has been widely used in the long-distance pipeline pressure pipe welding, due to the simple process equipment, welding speed, high efficiency, good quality, suitable for field operations and low temperature welding environment, so in China’s oil industry system Has been widely used. In the power industry, due to process constraints and other factors, the current downward welding technology has not been popularized and applied. According to the characteristics and superiority of down-welding process, it is used in power plant underground pipe network and circulating water and other large-diameter thin-walled tubes, as well as the plant circulating water, condensate, industrial cooling water and low pressure water supply diameter 300mm The above pipeline welding construction, has a broad application prospects.