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 U6 - http://nbn-resolving.de/urn/resolver.pl?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 - TY - RPRT A1 - Frost, K. A1 - Lüth, Peter A1 - Schmidt, Martin A1 - Simon, K. A1 - Uhlig, St. T1 - Evaluation of the interlaboratory test 2015-2016 on the method DIN EN 15188:2007 “Determination of the spontaneous ignition behaviour of dust accumulations” N2 - For the classification, safe handling and use of the chemicals, special standardized testing procedures have been developed and are used worldwide. Safety experts must be able to fully rely on the precise execution of the respective laboratory tests and assessments. In this context, interlaboratory tests are a crucial element of a laboratory's quality system. Participation in interlaboratory tests is explicitly recommended by the standard ISO/IEC 17025. The present document reports the results of the interlaboratory test 2015-2016, which was performed on the test method DIN EN 15188:2007 “Determination of the spontaneous ignition behaviour of dust accumulations”. It was organized by BAM in the frame of the co-operation project CEQAT-DGHS Centre for Quality Assurance for Testing of Dangerous Goods and Hazardous Substances. The test method DIN EN 15188:2007 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. The interlaboratory test 2015-2016 on the method DIN EN 15188:2007 is the latest in a systematic stepwise built up series of method validation interlaboratory tests and internal laboratory investigations. The aim of this interlaboratory test was to determine measurement uncertainties of the modified method DIN EN 15188 for different substances, covering a sufficiently wide range of self-ignition behaviours in the scope of the DIN EN 15188 of the four basket test to extrapolate to storage volumes up to 1000 m³ and the single basket test for a basket volume of 1000 cm³. The precision of the four basket test and the single basket of the modified method DIN EN 15188 can be assessed as acceptable for the four sample materials investigated in the current interlaboratory test 2015-2016. It was possible to derive a functional equation for the measurement uncertainty U depending on the storage volume V. The measurement uncertainty cannot be ignored and must be considered, if TSI results should be used in practice. KW - Gefahrgut KW - Gefahrstoff KW - Ringversuch KW - Prüfmethode KW - Validierung KW - Qualitätssicherung KW - Messunsicherheit KW - Dangerous goods KW - Hazardous substances KW - Round robin test KW - Interlaboratory comparison KW - Test method KW - Validation KW - Measurement uncertainty PY - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-387343 SN - 978-3-9818270-0-2 SP - 1 EP - 106 PB - Bundesanstalt für Materialforschung und -prüfung (BAM) CY - Berlin AN - OPUS4-38734 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -