seamless steel pipe 1.10#,20#,45#,16Mn, ... , Q 195, Q345, 27SiMn 30 inch seamless steel pipe 10#,20#,45#,16Mn, ASTM A106 Gr.B ... Q 235, Q 195, Q345, 27SiMnseamless steel pipe Production Carbon seamless steel pipe Brand Jingta Specification 10.29mm-508mm (1 ... days or as clients reqestments. SpecificationsChina StandardSteel GradeStandardseamless steel tubesand pipesfor structural purposeGB/T8162-199910, 20, ...