... galvanized steel pipeCertificate:ISO9001:2008, SGS,BV, etc Surface:Hot galvanized, Cold galvanized Key word: electrical resistance weld steel pipe Specification Typeelectrical resistance weld steel pipe Pipe ... boiler heat, exchanger, gas metallurgy, etc.Surface Hot galvanized, Cold galvanized, Painted black, varnish paint, anti rust oil, ... &Transportation Company fence post galvanized steel pipe