... :3-12m 5.Certification:ISO@APIASTM seamless steel pipe TypeASTM A53 standard seamless steel pipeBrand NameJinshengStandardASTM,DIN,GB,JIS,API 5L ... ,Q345,20#,10#,45#,St33,St37,St35.8,A53-A,A53-B,A106-A,A106-B,A210-A-1,STB33SpecificationO.D.:8-630mmW.T ...