... :ANSI, ASTM,DIN,BS, SGS ISO9001:2000Usage:1)Automatic sprinkler system for fire protection on commercial ,civil and municipal constructions ... supplying ,gas2)supplying, heat supplying,etcIndustrial pipeline system on shipping ,mine, oil field,textile,powder plant,etc ... .3)Pipeline system on subway station ,railway station ,airport, seaport,bridge, ...