Galvanized seamless pipe Standard ASTM, BS1387-1985,GB/T3091-2008,DIN2440,JIS-G3444, ... Length:2-12m4) UsageWidely used as the pipeline of fumiture,structure,fence,industrial and civilian water,air,petroleum,natural gas, communication ... production process are made under the ISO9001:2000strictly Galvanized Steel Pipe