... abasic materials for industries or construction 1 galvanized pipe hollow structural section,1 hollow pipe section1.ASTM A53,ASTM A500, ASTM A513, ... 2.ANSI C80.1 ,ANSI C80.3 3.BS1387, ... EN10240,EN10255 5.DIN2440,DIN2444,DIN2458 6.AS1163,AS1074,AS2556OuterDiamete: 1/2"to16"Wallthickness: 0.6mm-20mmLength: Max 12metersSdandard: GB ...