Steel Pipes, Pipes Fittings, Socket Fittings manufacturer / supplier in China, offering ASTM A53 Gr. B Seamless Carbon Steel Pipe Hot Rolled, A105 A105n Q235B Black Steel International Standard Welding Neck Flange, Awwa C207 A105 SA105 A105n Class 300 Socket Weld Flange Carbon Steel Flange and so on.