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asme b36.10 carbon carbon steel a53 seamless pipe sch40 api 5l gr.b Coating seamless steel pipe, US $ 550 - 550 / Ton, API, JIS, DIN, ASTM, GB, bs, API 5L, JIS G3463-2006, DIN 1626, ASTM A106-2006, GB 5310-1995, BS 1387, Q195-Q345, A53-A369, 16mn, 10#-45#, ST35-ST52, Cr-Mo alloy, Q235, Q345, Q215, A