... Steel, Alloy Steel, Nickel Alloy Steel, Duplex Steel and Super Duplex SteelSteel Pipe TypeSeamless Steel Pipe, Welded Steel Pipe ... 10#, 16Mn, A106(B,C), 45#, API J55, API K55, St52, Q215, API N80, St37, API L80, API P110, St42, St45, St52.4API 5L A ... or According to customers' requirements.Surface Treatment3PE, 3PP,EP and Black PaintingApplicationFluid Pipe, Boiler Pipe, Drill Pipe, Hydraulic Pipe ...