... 42, St 52, Q 235, Q 195, Q345, 27SiMnseamless steel pipe Production Carbon seamless steel pipe Brand Jingta Specification 10.29mm-508mm (1/8''-20 ... 39mm Grade 10#,20#,45#,16Mn,27SiMn,12Cr1MoV,Q235, ST42,ST52,A106-a,A106-b, and so on Length 6-12m ... -199910, 20ASTM A179, ASTM A192 ASTM SA179,SA192, BS3059Seamless Steel Tubes for high pressure --Chemical fertilizer equipmentGB6479-8610, 20G, Q345, Q390, ...