GB/T 20284 Single Combustion Product Test for Building Materials and Products

The standard “GB/T 20284 Single combustion product test for building materials and products” published among the National Standards of the People's Republic of China describes a test method for determining the fire reaction performance of building products when subjected to thermal attack by a single burning substance, excluding flooring and products specified in the legal regulation No. 2000/147/EC on the classification of fire reaction performance of building products issued in the European Union countries. Calculation procedures are included in the standard annex (Annex A). Information on the sensitivity of the test method is given in a separate annex (Annex B). Calibration procedures are given in Annex C and Annex D.

This standard was developed primarily to determine the reaction to fire performance of straight products. Some product families, such as linear products (pipes, ducts, cables, etc.), require special requirements for processing.

Essentially, this test method is used to evaluate the reaction to fire performance for all construction products except flooring.

Single combustion product is a test method applied to determine the fire response behavior of building products (excluding floors) when subjected to thermal attack from a single burning product. During the test, the response of the sample to the burner is monitored instrumentally and visually. Heat and smoke release rates are calculated and physical properties are evaluated by observation. The parameters determined quantitatively in this test and used within the classification criteria are total heat release, fire growth rate index and smoke growth rate index.

The single combustion product test was developed for the European Commission to provide a basic test method for assessing the reaction to fire performance of construction products such as wood panel products. This test determines: lateral flame spread, heat release rate, tendency to produce flaming droplets and smoke production rate.

The main benefits of this test method are ensuring compliance with current legal regulations, increasing fire safety and obtaining comprehensive and comparable results.

Products are tested using single-burn product test methods to ensure they perform as expected in their end-use scenarios. These tests provide appropriate data to compare the performance of materials, composites or assemblies used primarily as exposed surfaces of walls or ceilings.

These tests also facilitate CE marking as they comply with the standards “EN 13823 Reaction to fire tests for construction products - Construction products excluding floors subjected to thermal attack by a single burning mine” and “EN 13501-1 Fire classification of construction products and construction elements - Part 1: Classification using data from reaction to fire tests”.

The single combustion product test facility shall consist of a test chamber, test apparatus (cart, frame, burners, hood, collector and duct), smoke exhaust system and general measuring equipment. Test chamber design drawings are provided in the standard appendix (Appendix E). Dimensions given on the drawings are nominal unless tolerances are given in the text.

The internal height of the test chamber in both directions shall be 2,4 m plus/minus 0,1 m and the internal floor area shall be 3,0 m plus/minus 0,2 m. The walls shall be made of stone-type building blocks, plasterboards, calcium silicate boards or other boards classified as Euro class A1 or A2.

The test room shall have an opening in one wall to allow the carriage into the test room from the surrounding laboratory. The opening shall be at least 1470 mm wide and 2450 mm high. Windows shall be placed on two walls facing the front of the two perpendicular sample planes.

Among the numerous testing, measurement, analysis and evaluation studies that our organization has carried out for businesses in various sectors, it also provides testing services defined in the “GB/T 20284 Single combustion product testing for building materials and products” standard with its trained and expert staff and advanced technological equipment.