TEST METHODS FOR THE FLAMMABILITY OF SUBSTANCES/PRODUCTS IN SOLID POWDER, GRANULAR AND PASTE FORM IN ACCORDANCE TO ADR
- ADR European Agreement Concerning the International Carriage of Dangerous Goods by Road – Volume I and Volume II
- Manual of tests and criteria - Part III - Classification procedures, test methods and criteria relating to class 2, class 3, class 4, class 5.1, class 8 and class 9
Classification procedure for readily combustible solids
A preliminary screening test is performed to determine if. on ignition by a gas flame, propagation by burning with flame or smoldering occurs. If propagation occurs within a specified time then the full test is earned out to determine the rate and vigour of burning.
The tests should only be applied to granular, paste-like or powdery substances. If in the screening test, the substance does not ignite and propagate combustion either by burning with flame or smoldering, it is not necessary to perform the complete burning rate test as the substance is not a readily combustible solid of Division 4.1. If propagation occurs and the burning time is less than a specified time, the full burning rate test should be performed. Whether the substance is a readily combustible solid of Division 4.1 and, if so, whether packing group II or III should be assigned is decided on the basis of the test result.
Principle of the method.
From a substance in the formulation, on a cold non-flammable, low thermal conductivity, a sample is formed in the form of a heap (without gaps) of about 250mm, a width of 20mm and a height of 10mm. A gas burner flame at a temperature of at least 1000oC shall be heap to one end of the sample. After two minutes (after five for metal powders) or after the ignition of the sample, the burner must be ejected. Based on the measurement of the combustion time and the range of the flame burning or glowing, the burning rate is determined.
Stand for burning rate test of readily combustible solids in accordance to ADR - European Agreement Concerning the International Carriage of Dangerous Goods by Road
Set for sample preparation
Test samples. Approx. 0.25 dm3 product as used in practice.
Application of the test method – transport of dangerous goods of Class 4.1 in the form of granules, powder or paste.