... .ASTM A53,ASTM A500, ASTM A513, 2.ANSI C80.1 ,ANSI C80.3 3.BS1387, BS1139 4.EN10219,EN10220, ... EN10240,EN10255 5.DIN2440,DIN2444,DIN2458 6.AS1163,AS1074,AS2556OuterDiamete: 1/2"to16"Wallthickness: 0.6mm-20mmLength: Max 12metersSdandard: GB ... the ISO9001:2000 strictlyO.D.D.N.W.T.1/2"21.3mm0.6mm-3.0mm3/4"26.7mm0. ... 6.0mm4"114.3mm1.0mm-7.0mm5"141.3mm1.0mm-8.0mm6"168.3mm3.0mm-16mm8"219.1mm3.2mm-16mm10" ...