Dear Sir/Madam,Standard:API 5DP,GB 6479-2000,ASTM A358-2005,ANSI A210-1996,GB/T 14976-2002,JIS G3457-2005Grade:16Mn,Q235,Q195,20#,STB42,16Mo,St52,STPG42,Q345,St37-2Surface Treatment:GalvanizedSection Shape:RoundApplication:Structure Pipe Dear sales rep,we wish to buy your proucts and i will like you to send us your recent products catlogs for reference purposewe await your urgent response. Show More