TRANSPORTATION CLASSIFICATION TESTING | SIGMA HSE

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Process Safety Testing
TRANSPORTATION CLASSIFICATION TESTING (UN / ADR
/ CLP)
The process of safety testing has also covered
Transportation Classification Testing (UN / ADR /
CLP) and Oxidising Solids.
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OXIDISING SOLIDS
PROCESS SAFETY TEST PROCESS The test is conducted
primarily for the purposes of transportation.
Mixtures of a reference oxidiser (potassium
bromate) / cellulose (fuel) and mixtures of the
substance and cellulose (fuel) to be tested are
prepared in specified ratios. Using a conical
funnel the mixtures are formed into a truncated
conical pile, covering a looped ignition wire
resting on the low heat conducting plate.
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OXIDISING SOLIDS
Power is applied to the ignition wire and is
maintained for the duration of the test. The
recorded burning time is taken from when the
power is switched on, to when the main reaction
(e.g. flame, incandescence or glowing combustion)
ends. The test is performed five times on each
substance to cellulose ratio and five tests are
performed with each reference mixture ratio
required to make a Packing Group assignment or to
determine if the substance should not be
classified in Division 5.1. For More Details
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FLAMMABILITY OF SOLIDS
The test is conducted primarily for the purposes
of transportation. A powder strip is formed using
a triangular cross sectioned mould, onto a heat
resistant, non-porous plate. Using a butane
flame, one end of the strip is ignited and the
initially the time taken to burn over a marked
200 mm length is recorded. If the time taken is
equal to or less than 120 s then further trials
are conducted over fresh powder strips and the
burning rate over a length of 100 mm measured. If
the time taken is equal to or less than 45 s (2.2
mm.s-1) then the material is classified as a
Flammable or Combustible Solid, of UN Class 4,
Division 4.1. 
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FLAMMABILITY OF SOLIDS
During the 100 mm trials, a section of the
material past the 100 mm mark is wetted and
observations are made to whether the wetted zone,
stops flame propagation for at least 4 minutes.
If the wetted zone fails to stop propagation the
material is designated to packing group 2, if it
succeeds, a packing group 3 designation is given.
The test method is identical to that detailed
within CLP/GHS regulatory procedures and
therefore data gathered can be used for both
applications. For More Details Click Here.
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Contact Us
Address Unit 2, Moorside Point, Moorside
Road, Winchester, Hants. SO23 7RX Email info_at_sigm
a-hse.com Website https//www.sigma-hse.com
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