schedule 40 api seamless pipe Technique: ERW Thickness: 0.8-8.0mm O.D ... 20-220mm Standard: GB, BS, ASTM A53-2007, AP astm seamless pipe1. Out Diameter: 20mm - 220mm2. Thickness: 0.8mm -8mm3 ... -1985, ASTM A-53, GB/T3091-2001 other standard pipe, complete product specifications.Exports to Europe, North America, the ... !According to customer demand production of special specification pipe. astm seamless pipe