Threeway steel Co.,Ltd made by three factories which can produce SMLS, ERW, SSAW, LSAW steel pipe to meet the your requirements. Our company, a professional steel pipe manufacturer,own six steel product facilities, and exporter for nearly 15 years, sincerely hope to establish business relations with your esteemed corporation.The production is carried out in accordance with TS EN ISO 9001:2000, API5 L, ISO 14001:2004 and ISO9001, SGS Integrated Management(quality) Systems. Production in our facilities is also realized in accordance with the international standards such as TS, DIN, AWWA, ASTM, BS, UNI, JIS, GOST, ANSI, ISO.Our Products Range (Welcome to call/email us for details, thanks!)SMLS: O.D. 0.0875"-30",. 0.035"-4.00"(Hot finish &Cold drawn)Welded steel pipes: O.D.6mm-4064mm, W.T.0.3mm-50mmOil pipes: O.D. 2 3/8" - 20", W.T. 0. 205"- 0.635"Square pipes: O.D.10 mm*10mm-500 mm*500mm, W.T. 0.5mm - 20.0mm