Steel Pipe, Cold Drawn Precision Seamless Steel Pipe, Precision Seamless Steel Tubes manufacturer / supplier in China, offering ASTM A105 A350 Lf2 S235jr Heavy Duty Forged Ring Flanges for Pipe Connections Valves, Ss 304 06cr19ni10 022cr19ni10 Stainless Steel Forged Rings Corrosion Resistant Food Grade for Sanitary Pipeline Systems, AISI 1045 Carbon Steel Forged Rings Hot Forged Annealed for High Tensile Strength in Heavy Machinery and so on.