... 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, BS1139 4.EN10219 ... 5.DIN2440,DIN2444,DIN2458 6.AS1163,AS1074,AS2556OuterDiamete: 1/2"to16"Wallthickness: 0.6mm-20mmLength: Max 12metersSdandard ... under the ISO9001:2000 strictlyO.D.D.N.W.T.1/2"21.3mm0.6mm-3.0mm3/4" ...