TY - RPRT A1 - Frost, K. A1 - Lüth, Peter A1 - Schmidt, Martin A1 - Simon, K. A1 - Uhlig, S. T1 - Interlaboratory test 2023 on the method DIN EN 15188:2021-07 "Determination of the spontaneous ignition behaviour of dust accumulations" - Final report of results N2 - The test method DIN EN 15188:2021-07 “Determination of the spontaneous ignition behaviour of dust accumulations” is applied to characterize the self-ignition behaviour of combustible dusts. The experimental basis for describing the self-ignition behaviour of a given dust is the determination of the self-ignition temperatures (TSI) of differently-sized volumes of the dust sample by isoperibolic hot storage experiments (storage at constant oven temperatures) in commercially available ovens. The results measured this way reflect the dependence of the self-ignition temperatures on the volume of a dust accumulation. Several internal investigations in the past (e.g. interlaboratory tests in 2010-2011 and 2015-2016) have shown significant differences between the lab-specific results of hot storage tests of the former version of the revised DIN EN 15188:2021-07 (DIN EN 15188:2007). Therefore, an improvement of the test method DIN EN 15188:2007 was necessary. After a rather long and extensive series of various improvements (methodological modifications), the interlaboratory test in 2015-2016 demonstrated an acceptable reliability of the test method and a satisfactory measurement uncertainty if the modifications described in the interlaboratory test are taken into account. On the basis of this interlaboratory test in 2015, this subsequently led to a revision of the standard, whereby, in addition to the methodological improvements, the measurement uncertainty to be taken into account could now also be specified for the first time in this standard. The revised DIN EN 15188:2021-07 was published in 2021 and can now be applied by laboratories. This report provides the laboratory results of the first interlaboratory test 2023 on the revised method DIN EN 15188:2021-07 and summarizes the results of the assessment of laboratory performance. KW - DIN EN 15188:2021-07 KW - Spontaneous ignition KW - Interlaboratory test KW - Round robin test KW - Proficiency test KW - Dangerous goods KW - Hazardous substances KW - Measurement uncertainty KW - Gefahrgut KW - Gefahrstoff KW - Qualitätssicherung KW - Ringversuch KW - Selbstentzündung KW - Staub KW - Dust PY - 2024 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-614560 SN - 978-3-9818564-6-0 DO - https://doi.org/10.26272/opus4-61456 SP - 1 EP - 51 PB - Bundesanstalt für Materialforschung und -prüfung (BAM) CY - Berlin ET - 1. AN - OPUS4-61456 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Brandes, E. A1 - Colson, B. A1 - Frost, K. A1 - Lüth, Peter A1 - Simon, K. A1 - Stolz, T. A1 - Uhlig, S. T1 - Evaluation of the interlaboratory test 2015 – 2016 on the method UN Test L.2 “Sustained combustibility test” / EN ISO 9038:2013 “Determination of sustained combustibility of liquids" N2 - The test methods UN Test L.2 / EN ISO 9038:2013 DIN EN 15188:2007 are applied to characterize the sustained combustibility of liquids i.e. the behaviour of a material under specified test conditions, whereby its vapour can be ignited by an ignition source and sufficient flammable vapour is produced to continue burning for at least 15 s after the source of ignition has been removed. The aims of this interlaboratory test (IT) are the verification and/or the improvement (if necessary) of the verification data (reference material) in Annex B of EN ISO 9038:2013, the assessment of influencing (disturbing) factors (laboratory specific factors, which possibly may have an influence on the test result) and the assessment of the performance of the participating laboratories. It could be demonstrated that the reference materials n-Dodecane, n-Decane and n-Undecane as mentioned in the standard are suitable and the verification shall continue to be valid. Sustained combustibility tests are influenced by several factors like the presence of a draught shield, the experience of the laboratory assistant, verification of the apparatus, calibration of the metering device. Based on the interlaboratory test, the gained experience and the actual results, well-founded measures / actions can be recommended to improve execution of the method. The IT was organized by PTB, BAM and QuoData GmbH in the framework of the co-operation project CEQAT-DGHS Centre for Quality Assurance for Testing of Dangerous Goods and Hazardous Substances. KW - Dangerous goods KW - Hazardous substances KW - Test method KW - Quality assurance KW - Interlaboratory comparison KW - Round robin test KW - Validation KW - Sustained combustibility KW - Reference material KW - Gefahrgut KW - Gefahrstoff KW - Prüfmethode KW - Qualitätssicherung KW - Ringversuch KW - Validierung KW - Selbstunterhaltende Verbrennung KW - Referenzmaterial PY - 2017 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-410270 SN - 978-3-9818270-3-3 SP - 1 EP - 103 PB - Bundesanstalt für Materialforschung und -prüfung (BAM) CY - Berlin AN - OPUS4-41027 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -