... Zhangjiagang Fangling Tube-making Co.,Ltd., established in 1994, is a leading manufacturer and exporter of stainless steel welding pipe/tube, outer diameter ... ASTM A3122)Product applications and applicable field: heat-exchangers, condensers, pipe fittings, electric power ,paper making, medicine, etc.3) Stainless steel ... heat treatment5) Annual production capacity: 1800 tons welded stainless steel pipe