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(1)Steel grade: C10, C20;
(2)Standard: GB5312;
(3)Specification: OD: 10mm-114.3mm (0.4055"-4.5"), WT: 2mm-22mm (0.0787"-0.8661");
(4)Dimension tolerance: O.D.: +/-0.08mm, W.T.: +/-10%;
(5)Surface: oiled or black painted to prevent rust;
(6)Marking: as per customer's requirement;
(7)Application: The products apply to ship building, such as steam boiler and heater in theship
C10, C20 carbon steel or carbon manganese steel seamless pipe for ship building