There are several grades of flame retardant grades of bag air ducts

The flame retardant grades of bag air ducts are divided into the following categories: 　　1).A level, no incineration material, 2.B1 level, difficult to incinerate material, 3.B2 level, incinerable material, 4.B3 level, easy to incinerate material.　　The incineration function of the materials that meet the following requirements is set to B1 level. 2). Test according to GB/T 8626, its incineration function should reach the target specified in GB/T 8626 and the phenomenon of burning drippings to ignite the filter paper is not allowed; 　　 3). Test according to GB/T 8625, each group The average remaining length of the test piece is ≥15cm (the remaining length of any test piece in the meantime is >0cm), and the peak uniform flue gas temperature of each test is ≤200℃.　　4). Test according to GB/T 8627, and its smoke density grade (SDR) ≤75.　　 Bag air duct is a fabric woven from permanent flame-retardant fiber yarn directly made by nanotechnology, and the flame-retardant function is no longer affected by washing. Together to achieve the best fire resistance, with high physical function goals such as pressure resistance, stretch resistance, stable permeability, antibacterial, antistatic and other fiber fabrics. The fiber fabric flame retardant of the bag air duct has been tested by the National Fireproof Building Materials Quality Supervision and Inspection Center, and the flame retardant function has reached the national standard requirements of GA159-1997, which meets the B1 requirements.

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