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Flame retardant cloth grade, flame retardant cloth specifications, flame retardant cloth, as the name implies, is to prevent the flame burning cloth, but there is a standard is to leave the flame after 16 seconds can automatically put out the fire cloth. Flame retardant cloth is divided into two categories: pre-treatment flame retardant cloth and post-treatment flame retardant cloth. Flame retardant cloth grade flame retardant grade, that is, the material has or material after treatment has significantly delayed the spread of the flame of the nature, and thus the classification of the hierarchy. The flame retardant grade increases step by step from HB,V-2 and V-1 to V-0: 1. HB: the lowest flame retardant grade in UL94 standard. It is required that for samples 3 to 13mm thick, the burning speed is less than 40mm per minute; for samples less than 3mm thick, the burning speed is less than 70mm per minute; or it is extinguished before the 100mm mark. 2. V-2: After two 10 second burn tests on the sample, the flame went out within 60 seconds. Burning can fall. 3. V-1: After two 10 second burn tests on the sample, the flame went out within 60 seconds. No burning can fall. 4. V-0: After two 10 second burn tests on the sample, the flame went out within 30 seconds. No burning can fall. Flame retardant cloth specifications flame retardant cloth specifications such as: EN470-1,EN531,EN532,NFPA2112,NFPA70E and so on. Keywords: flame retardant cloth flame retardant cloth grade flame retardant cloth specifications AA