ADR Class 4.1
Laboratory
TEST
METHODS
FOR
THE
FLAMMABILITY
OF
SUBSTANCES/PRODUCTS
IN
SOLID
POWDER,
GRANULAR
AND
PASTE
FORM
IN
ACCORDANCE TO ADR
Test
methods:
- 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.