In the field of dust bag, the bag is usually likened bag house heart, bag filter can handle what flue gas dust, also depends mainly used to manufacture chemical fiber bag their own conditions. So we must understand the dust bag performance test methods in order to select the most suitable dust bag. For dust bag, content verification and testing needs as follows: 1. Visual inspection: puncture, defects, spots, jumpers, disconnection, and other joints. 2. Physical properties: If the unit mass of dust bag area, thickness, amplitude, woven tissue, fabric density, non-woven fabric bulk density, porosity and the like. 3. Mechanical properties: If the dust bag breaking strength, elongation at break, bag of latitude and longitude to the load elongation, bursting strength of filter media and the like. 4. Dust features: such as the drag coefficient, static dust removal efficiency, dynamic collection efficiency filter dynamic resistance, resistance coefficient and dust stripping regeneration rate. 5. Special feature: such as temperature resistance, corrosion resistance, electrostatic properties, hydrophobicity and the like. Under normal conditions the flue gas temperature, the bag can only resistance temperature below 150 ℃, these occasions, polyester, polypropylene, acrylic, nylon and other chemical fiber can basically do the job. For the flue gas temperature is relatively high occasions, you need to select high-temperature filter, such as glass fiber dust bag, fluorine Mae dust bag, dust bag US Freitas, PPS dust bag and so on.