Key word:electrical resistance weld steel pipe Certificate:ISO9001:2008, SGS,BV, etc ... , Cold galvanized Key word: electrical resistance weld steel pipe Specification Typeelectrical resistance weld steel pipe Pipe Size1/2"—48" ( ... power, foodstuff, papermaking, chemical, medical equipment, boiler heat, exchanger, gas metallurgy, etc.Surface Hot galvanized, Cold galvanized, Painted black, varnish ...