Flow properties of powdery or granular filling substances of dangerous goods packagings—Comparison of the measurement of the angle of repose and the determination of the Hausner ratio

To ensure safety when transporting dangerous goods, it is important to specify the flow properties of respective solid filling substance packagings. For this purpose, angle repose currently used for UN approvals in Germany. Measurements were carried out on 12 powdery or granular substances applying measuring methods customary test centres. The results differ significantly from each other. In addition, some techniques cannot be applied very cohesive coarse-grained materials. show a strong scatter constellations (coefficient variation more than 20%). Safety during transport goods guaranteed with practised system repose. As consequence, an alternative parameter characterize bulk materials should recognized centers packagings, such as Hausner ratio. This approach leads precise examined (maximum coefficient 2.8%). It also has advantages terms applicability and occupational safety. Since are safety-relevant, both mechanical against release substances, testing practice labs improved standardized.