由水电四局李家峡施工局机械厂工程技术人员研制并取得成功的巨型钢管整体卷制一次成型工艺,在国内外处于领先水平。其基本工序是:把需要焊接的钢板接头进行特殊处理后,用埋弧自动焊组焊成整块后,整块钢板一次卷制成型,最后焊接成管。经过有关专业机构的论证、测定,以及李家峡水 By the four hydropower Lijiaxia Construction Machinery Factory Engineering and Development and successful giant steel pipe overall molding a molding process, at a leading level both at home and abroad. The basic procedure is: the need to weld the steel plate joints for special treatment, the use of submerged arc welding automatic welding group, the entire plate a roll forming, and finally welded into the tube. After the demonstration of relevant professional bodies, determination, and Lijiaxia water