China Zhonghai Steel Pipe Manufacturing Co, .Ltd is one of the best professional manufacturers specializing in producing: 1. Seamless steel pipe (Hot-expanded and hot-rolled steel pipe), 2. SSAW steel pipe(Spiral-seam steel pipe), 3. LSAW steel pipe(Straight-seam steel pipe), 4. ERW steel pipe(Electric Resistance Weld). Our company manufactures various kinds of diameter (89mm--1220mm) and wall thickness (2mm--60mm). Not only base on ISO9001-2000 series, but also passed the certification of API &...
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