PVC plastic sheets BS 476-6 determination of flame propagation properties

Overview of standard tests ：

BS 476-6 The test standard is applicable to the comparison of various materials , It is mainly used to evaluate the fire performance of wall and ceiling lining , The measured results are expressed by the flame propagation index .

 

BS 476-6 The test method is a method for determining the flame propagation performance of materials , It is mainly used to evaluate the fire performance of wall and ceiling lining , The measured results are expressed by the flame propagation index .

Continuously record the difference between the temperature in the chimney and the room temperature with a thermocouple , And the results obtained ( Temperature difference versus time ) And calibration curve （ The calibration curve is based on asbestos of specified density - The cement board is determined in the same way ） Compare .

Standard name ：

BS476-6: Fire Tests on Building materials and structures – Method of test for fire propagation for products

BS476-6: Fire retardant and fireproof test of building materials and building components – Test method for flame propagation of products

Introduction to igniter ：

The ignition source of this method is 2 Electric heater and 1 A tubular blowtorch . A chimney is installed on the combustion pipe of the device , A thermocouple is installed in the chimney to measure the flue gas temperature . The power of the electric heater is adjustable , It is away from the vertically placed specimen 45mm. Pipe diameter of tubular blowtorch 9mm, Yes 14 A nozzle 、 The inner diameter of the nozzle is 1.5mm, The center distance of each mouth is 12.5mm. At the bottom higher than the exposed surface of the test piece 25mm Apply a blowtorch flame at .

Curve contrast ：

In order to evaluate the flame propagation performance of the tested material , Continuously record the difference between the temperature in the chimney and the room temperature with a thermocouple , And the results obtained ( Temperature difference versus time ) Compare with calibration curve ,

Calculate the flame propagation index i value : I The higher the value of the material , Lower flame retardancy

BS 476 Other relevant test standards ：

BS 476-3： Fire test of building materials and components - Fire test of exposed parts of roof

BS 476-4： Fire test of building materials and structures - Material non flammability test

BS 476-7： Fire test of building materials and components . The first 7 part : Test method for determining the classification of flame surface spread of products

BS 476-20： Fire test of building materials and components . The first 20 part : Test method for fire resistance of building components ( The general principle )

BS 476-21： Fire test of building materials and components . The first 21 part : Test method for fire resistance of load-bearing components

BS 476-22： Test method for fire protection of non loaded building elements

BS 476-23： Fire test of building materials and components . The first 23 part : Test method for apportionment of fire resistance of components to components

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