ASTM A335 P22 Seamless Steel Pipe Production Process
The production process of ASTM A335 P22 pipe mainly includes material selection, smelting, rolling, heat treatment and other steps. Among them, the smelting process usually adopts the killed steel smelting process of electric furnace smelting + ladle refining (LF) + vacuum degassing (VD)/electroslag remelting (SER) to ensure that the chemical composition and mechanical properties of the steel pipe meet the standard requirements. The rolling process includes hot rolling, cold rolling (drawing), overall hot expansion, punching-drawing hot forging + machining and other methods to ensure the dimensional accuracy and surface quality of the steel pipe. The heat treatment process includes two steps: normalizing and tempering to improve the strength and toughness of the steel pipe.
