American tunneling ASTM E84 surface flame retardant test

ASTM E84 As long as it is the surface combustion performance test standard for building materials , It is under controlled combustion conditions , Use horizontal combustion tunnel device （Steiner Tunnel , As shown in the figure ） Standard Test Method for determining relative surface flammability . This method determines the flame spread index and smoke index （ Although the two indexes are not necessarily related ）, It also helps to determine the suitability of materials under specific installation requirements .

Steiner Tunnel method , That is to say ASTM E 84（ Standard Test Method for surface burning characteristics of building materials ）, To determine under specific test conditions , Relative surface combustion characteristics of materials . The results are based on the flame spread index （FSI） And smoke index （SD） Express .

Test principle ：

ASTM E84 Is to compare the surface combustion characteristics of the tested material with asbestos plywood and untreated red oak .0 The grade is asbestos plywood ,100 Grade untreated red oak flooring material . The flame propagation rate of various untreated wood ranges from 60 To 230. In this test , The smoke produced during combustion is also measured , And its level is divided in the same range . These levels are at the beginning 10 It was determined in minutes . However, it is different from fireproof coating , The building code requires the test time from 10 Minutes to 30 minute , Flame propagation shall not exceed that of the burner 10 1/2 feet , And there is no sign of further combustion .

ASTM E84 Sample specification ：

Sample size ： Width ：508~610 mm, length ：7315mm-152mm+305mm, Width ： Maximum 101mm

Pretreatment before test ：

Before testing , Place the sample at the temperature 23 ± 2.8 °C And relative humidity 50 ± 5% To constant weight .

ASTM E 84 The basis of judgment ：

Class A  Flame spread index （FSI）: 0-25   Smoke index （SDI）: 0-450

Class B  Flame spread index （FSI）: 26-75 Smoke index （SDI）: 0-450

Class C  Flame spread index （FSI）: 76-200        Smoke index （SDI）: 0-450

Other fire test standards for building materials ：

EN 13501-1: Fire classification of building products and components Part I ： Reaction data to fire classification test

DIN 4102-1: Fire performance of building materials and components Part I ： Classification and grade of requirements and tests for building materials

NF P 92-501: Flame retardant and fireproof test of French materials M Grade determination － Rigid materials

NF P 92-503: Flame retardant and fireproof test of French materials M Grade determination － Flexible materials

BS 476-6： Fire test of building materials and components . The first 6 part : Test method for fire spread of products

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

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