219-711 × 22 CFOE mill is an advanced mill with patent technology in our company. It is successfully used in Liaoning Hongxiang Steel Pipe Co., Ltd. CFOE means that the pipe is through continuously flexible forming and submerged arc welding. This welded tube mill chooses coil as its raw material to manufacture thick-wall and high-strength seam submerged arc welding pipes. CFOE mill completely adopts API standard.