HAF specialize in filter, all kinds of filter elements, coalescer, vapor recovery system, flare gas treatment, oil water separator, three phase filter(solid, liquid, gas), demister, waste gas treatment, gas purification/cleaning.during 15 years development, HAF owns several patents and a number of international quality certificates including API, ISO9001, ISO 14000,OHSAS18000, TS29001 and so on. In addition, HAF is the supplier of China Petroleum and Chemistry Corp(SINOPEC), China National Petroleum Corporation(CNPC), China National Offshore Oil Cor.(CNOOC).