... petrochemical engineering, etc The feature of our precision seamless steel pipeItems SpecificationsStandardGBDINASTMGB/T8162-1999 GB/T8163-1999 GB ... Material10#, 20#, 45#, 16Mn, 30CrMo, Q345, St37, St52, St45, St35.8, ST35 Technique Cold rolled, Cold ... Material10#, 20#, 45#, 16Mn, 30CrMo, Q345, St37, St52, St45, St35.8, ST35 Technique Cold rolled, Cold ... with me! DIN 2391 precision seamless steel pipe