... steel pipe. We provide our customer with mainly steel pipe include carbon steel seamless pipe, seamless roll steel pipe, Double-side buried arc spiral welded pipes, ERW pipe, SSAW pipe ... standards: API 5L, API 5CT, ASTM material:16MN, Q2952. SSAW Steel Pipe OD: 219.1 - 4064mm (8" - 160") THK: 3.2 ... , GB/T5037-2001, GB/T5040 material:16MN, Q2953. ERW Steel Pipe. Oil casing pipes: OD: 219.1 - 609.6mm ( ...