Propagation testing device PPS

flame resistanceautomaticmaterial

Surface Spread of Flame Test Apparatus, in accordance with BS 476 part 7, is used to measure the lateral spread of flame along the surface of a product in the vertical orientation exposed to a particular radiant panel. It provides data for assessing the potential fire hazard of a product in particular conditions, such as the product used in the walls and ceilings. How to Conduct a BS 476 Part 7 Test? BS 476 Part 7 Surface Spread of Flame Test carry out as per the following procedure. a) Ignite the radiation panel, and enable the irradiances specified in BS 476 part 7 to be achieved. b) Ignite the pilot flame. c) Take a specimen out from the conditioning atmosphere install it into the specimen holder, and hold the specimen holder in the standby position. d) Swing the specimen into the test position, and start timing. e) Extinguish the pilot flame 1 min after the test started. f) Record the time at which the front of sustained flame spread to the reference line. g) Record the spread distance of the front of the flame at the time of 1.5min and 10min. h) Record the behaviour that occurred during the test. i) Terminate the test when the 825mm reference line is reached, or 10min elapsed. j) Swing the holder into the standby position, and remove the remains of the specimen or debris. k) Repeat the test two more times.