... with mainly steel pipe include carbon steel seamless pipe, seamless roll steel pipe, Double-side buried arc spiral welded pipes, ERW pipe, SSAW pipe. etc.We ... ), API SPEC 5Lmaterial:10#, 20#, 16MN, Q295API Welded Steel Pipe For LSAW SSAW ERW 1. Steel Pipes (LSAW) OD: 457 - 1, 220mm ... .1-1997, GB/T5037-2001, GB/T5040 material:16MN, Q2953. ERW Steel Pipe. Oil casing pipes: OD: 219.1 - 609.6mm (8 ...