... ASTM A53,ASTM A500, ASTM A513, 2.ANSI C80.1 ,ANSI C80.3 3.BS1387, BS1139 4.EN10219, ... ,EN10255 5.DIN2440,DIN2444,DIN2458 6.AS1163,AS1074,AS2556OuterDiamete: 1/2"to16"Wallthickness: 0.6mm-20mmLength: Max 12metersSdandard: ... GB,ANSI,ASME,ASMT,JIS,DIN,BS,ENSteelGrade: Q195,Q215,Q235,Q345,10#,20#,ASTM, ... the ISO9001:2000 strictlyO.D.D.N.W.T.1/2"21.3mm0.6mm-3.0mm3/4"26. ...