... quality,best service and reasonable price we have many kinds Of steel pipe,as seamless steel pipe,stainless steel pipe,welded pipe and so on1 seamless ... steel pipe standard:GB/t8162- ... 45#,10#,Q295,Q345,12CrMo,15CrMo,1Cr2Mo,1Cr5M and so on 2 stainless steel pipe standard:GB/t8162-2008,GB/T8163-2008 ...