TRANSPORTATION TESTS Burning Rate Test - DOT/UN Division 4.1 The Burning Rate or Fire Train Test is used to classify materials as "flammable solids" in accordance with U.S. Department of Transportation (DOT) and United Nations (UN) requirements. Chilworth Global performs the Burning Rate Test in accordance with the method described in 49 CFR 173 Appendix E and UN Recommendations on the Transport of Dangerous Goods. The test involves igniting a 250 mm x 20 mm x 10 mm powder train using a suitable ignition source and measuring the burning rate (time). Pyrophoric Solids Test - DOT/UN Division 4.2 The Pyrophoric Solids Test is used to classify solids materials as "spontaneously combustible" in accordance with U.S. Department of Transportation (DOT) and United Nations (UN) requirements. Chilworth Global performs the Pyrophoric Solids Test in accordance with the method described in 49 CFR 173 Appendix E and UN Recommendations on the Transport of Dangerous Goods. The test involves pouring a powder sample from a height of one meter onto a non-flammable surface and observing whether the sample ignites during its descent or after settling. Self-Heating Substances Test - DOT/UN Division 4.2 The Self-Heating Substances Test is the second of two tests used to classify materials as "spontaneously combustible" in accordance with U.S. Department of Transportation (DOT) and United Nations (UN) requirements. Chilworth Global performs the Self-Heating Substances Test in accordance with the method described in 49 CFR 173 Appendix E and UN Recommendations on the Transport of Dangerous Goods. The Self-Heating Substances Test involves placing a powder sample in a 100 mm x 100 mm x 100 mm stainless steel cubic mesh basket and placing the basket in an oven where it is exposed to a constant temperature of 140 °C for 24 hours. If necessary, a second trial is performed using a 25 mm x 25 mm x 25 mm mesh basket. The sample and oven temperatures are continuously monitored at several locations for the duration of the test. Dangerous When Wet Test - DOT/UN Division 4.3 The Dangerous When Wet Test is used to identify materials that -- upon contact with water or moisture -- are liable to become spontaneously flammable or evolve a flammable or toxic gas, as per U.S. Department of Transportation (DOT) and United Nations (UN) requirements. Chilworth Global performs the Dangerous When Wet Test in accordance with the method described in 49 CFR 173 Appendix E and UN Recommendations on the Transport of Dangerous Goods. The Dangerous When Wet Test is comprised of four (4) parts, each of which involves exposing a small amount of solid sample to a limited amount of water. The samples are observed to determine whether gas is evolved and whether such gas is flammable. The volume of gas evolved is measured to determine the gas evolution rate. Solid Oxidizing Substances Test - DOT/UN Division 5.1 The Solid Oxidizing Substances Test is used to classify materials as such in accordance with U.S. Department of Transportation (DOT) and United Nations (UN) requirements. Chilworth Global performs the Solid Oxidizing Substances Test in accordance with the method described in 49 CFR 173 Appendix F and UN Recommendations on the Transport of Dangerous Goods. The test involves mixing powder samples with sawdust in various proportions and observing the combustion characteristics when a conical pile of the sample/sawdust mixture is ignited by a hot loop ignition source. Oxidizing Liquids Test - UN/DOT Division 5.1 The Oxidizing Liquids Test is used to classify materials in accordance with U.S. Department of Transportation (DOT) and United Nations (UN) requirements. Chilworth Global performs the Oxidizing Liquids Test in accordance with the method described in 49 CFR 173 Appendix F and the UN Recommendations on the Transport of Dangerous Goods using the Time/Pressure Test Apparatus. The test involves mixing a 2.5 gram sample of the suspected liquid oxidizer with an equivalent sample of dried fibrous cellulose. The mixture is then loaded into the test cell and ignited using a fuse wire. A pressure transducer fitted to the test cell is used to measure the maximum deflagration pressure and maximum rate of pressure rise. The results for the sample and mixture are then compared to results for testing of mixtures of cellulose and known oxidizers to determine the classification and packing group.
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