Leifen Steel has 12 production lines to produce square steel pipes from 20*20*1.3mm to 1200*1200*50mm, rectangular steel pipes from 20*30*1.2mm to 1500*1000*50mm, length 1 meter to 25 meters. Our inventory is 3 million tons, which can meet customers' direct purchase requirements. We manufacture hollow sections from steel grades S000 to S235/Gr.A-Gr.D. and manufacture square rectangular pipes in accordance with ASTM standard A460, ASTM A500, JISG501, EN3466, EN10219, DIN10210, AS/NZS2240. We also have our own heat treatment processing plant to make the pipes chemically and physically stable after forming production types: cold forming and hot forming.