Carbon seamless steel pipe 10#,20#,45#,16Mn, ASTM A106 Gr.B, ASTM A53 Gr.B, St 37, St 42, St 52, Q 235, Q 195, Q345, 27SiMn Carbon seamless steel pipe Liaocheng Runde Materials co.,Ltd TRUST ME, CHOOSE ME, YOUR RIGHT CHOICE. ProductionCarbon seamless steel pipeBrandRUNDESpecification10.29mm-1016mm 1/8’’-40’’× 1.2mm-39mmStandardGB, ASTM, API 5L, API 5CT,DIN, JIS and so onOut Diameter10.29mm-1016mm ...