1)O.D: 1/2''-12'' 2)WT: 0.8mm-12mm 3)Length: 3-12m 4)Standard: ASTM, BS, EN ... to international standard. Black steel pipes are used in the following fields, steel structure, build structure, ... since our good quality and service. 2. Production standard: ASTM A53, BS1387, EN10255, EN10240, EN10220, EN10219, EN39, ... DAYSPACKING1,Big OD:in bulk2,Samll OD:packed by steel strips3,woven cloth with 7 slats4,as ...