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SS400 Q235 Q345 Q460 A572 Gr.50 Gr.1/Gr.2/Gr.3 S235 SAW Welded Steel Pipe Feature: Length: 5.8 ~ 12.0 m or upon customers' requirements Standard: GB/T 3091, GB/T 13793, ASTM A252, ASTM A53, ASTM A500, ...