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4 Inch Galvanized Steel Pipe Manufacturers China, US $ 500 - 700 / Ton, GB, GB/T 8163-1999, ASME, Q195-Q345, Q195, DX51D+Z, 0.8 - 18 mm.Source from Tianjin Liwei IronSteel Co., Ltd. on Waimaotong.com.