TY - CONF A1 - Krietsch, Arne A1 - Scheid, Marc T1 - Tests on suitability of a new pyrotechnical igniter for the determination of explosion characteristics of dust clouds in 20-L-sphere and 1-m³-vessel T2 - 8th ISHPMIE - International symposium on hazards, prevention, and mitigation of industrial explosions CY - Yokohama, Japan DA - 2010-09-05 KW - Explosion characteristics of dusts KW - 20-L-sphere KW - 1-m³-vessel KW - Pyrotechnical igniter KW - Dust explosion testing PY - 2010 IS - ISH021 SP - 1 EP - 9 AN - OPUS4-22760 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Scheid, Marc A1 - Krietsch, Arne T1 - Brand- und Explosionsgefahren bei der Handhabung von Nanostäuben oder ultrafeinen Partikeln mit Korngrößen < 1 µm T2 - Jahrestreffen des Fachausschusses "Chemie", Arbeitskreis "Explosionsschutz" CY - Heidelberg, Germany DA - 2010-11-25 PY - 2010 AN - OPUS4-22754 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Scheid, Marc A1 - Krietsch, Arne T1 - Tests on suitable of a new pyrotechnical igniter for the determination of explosion characteristics of dust clouds in 20-L-sphere and 1m^3-vessel T2 - Eighth International Symposium on Hazards, Prevention and Mitigation of Industrial Explosions (8th ISHPMIE) CY - Yokohama, Japan DA - 2010-09-05 PY - 2010 AN - OPUS4-22578 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krietsch, Arne A1 - Schmidt, Martin T1 - Ignition and Burning Behaviour of Coals, Gas Emissions T2 - Final Meeting Sino-German Coal Fire Research Initiative, Phase B CY - Beijing, China DA - 2010-03-24 PY - 2010 AN - OPUS4-21124 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Krietsch, Arne A1 - Schmidt, Martin A1 - Suhendra, Suhendra A1 - Helmis, Mario T1 - Laboratory investigations on the ignition and burning process of coal: Fire characteristics and gas emissions T2 - 2nd International conference on coal fire research (ICCFR2) CY - Berlin, Germany DA - 2010-05-19 KW - Spontaneous combustions KW - Coal fires KW - Gas emissions KW - Fire propagation PY - 2010 SN - 978-3-86012-397-3 SP - 147 EP - 152 AN - OPUS4-21461 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krietsch, Arne A1 - Schmidt, Martin T1 - Eight Years of Sino-German Coal Fire Research T2 - Seminar at BRE Centre for Fire Safety Engineering CY - Edinburgh, Scotland DA - 2010-08-13 PY - 2010 AN - OPUS4-21903 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Krietsch, Arne A1 - Scheid, Marc A1 - Lasry, M. A1 - Suter, G. A1 - Teske, H.-J. A1 - Stahmer, K.W. A1 - Arnold, A. A1 - Nemcak, O. A1 - Cesana, C. A1 - Siwek, R. ED - Suter, G. ED - de Rademaeker, E. T1 - Validation of alternative igniters for the determination of explosion characteristics of dust clouds in 20-l-sphere and 1-m³-vessel T2 - 13th International symposium on loss prevention and safety promotion in the process industries CY - Brugge, Belgium DA - 2010-06-06 KW - Brenn- und Explosionskenngrößen KW - Bestimmungsmethoden KW - 20-l-Kugel KW - 1-m³-Behälter PY - 2010 SN - 978-90-76019-291 VL - 2 SP - 227 EP - 233 CY - Brugge, Belgium AN - OPUS4-22620 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krietsch, Arne A1 - Schmidt, Martin A1 - Suhendra, Suhendra A1 - Helmis, Mario T1 - Laboratory Investigations on the Ignition and Burning Process of Coal: Fire Characteristics and Gas Emissions T2 - 2nd International Conference on Coal Fire Research ICCFR2 CY - Berlin, Germany DA - 2010-05-19 PY - 2010 AN - OPUS4-21389 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Scheid, Marc A1 - Krietsch, Arne T1 - Untersuchungen zur Eignung eines alternativen pyrotechnischen Zünders zur Bestimmung von sicherheitstechnischen Kenngrößen in 20-l-Kugel und 1-m³-Behälter T2 - 57. Sitzung des Arbeiskreises "Brennbare Stäube" CY - Freiberg, Germany DA - 2010-06-23 PY - 2010 AN - OPUS4-21743 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krietsch, Arne A1 - Scheid, Marc T1 - Experimentelle Untersuchung zum Einfluss eines neuen pyrotechnischen Zünders auf die ermittelten STK T2 - Interschutz - Internationale Leitmesse für Rettung, Brand- und Katastrophenschutz und Sicherheit CY - Leipzig, Germany DA - 2010-06-07 PY - 2010 AN - OPUS4-21746 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Scheid, Marc A1 - Krietsch, Arne A1 - Lasry, M. A1 - Suter, G. A1 - Teske, H.-J. A1 - Stahmer, K. W. A1 - Arnold, A. A1 - Nemcak, O. A1 - Cesana, C. A1 - Siwek, R. T1 - Validation of alternative igniters for the determination explosion characteristics of dust clouds in 20-l-sphere and 1-m³-vessel T2 - 13th International Symposium on Loss Prevention and Safety Promotion in the Process Industries CY - Bruges, Belgium DA - 2010-06-06 PY - 2010 AN - OPUS4-21747 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Krietsch, Arne A1 - Scheid, Marc T1 - Tests on suitability of a new pyrotechnical igniter for the determination of explosion characteristics of dust clouds in 20-L-sphere and 1-m³-vessel N2 - Safety characteristics are essential for the design of preventive and protective explosion measures. According to international Standards explosion characteristics of dust clouds are determined in 20-L-sphere and l-m3-vessel. The ignition of respective dust samples is realized vvith special pyrotechnical igniters with energy of 1 kJ or 5 kJ vvhich are defined in the testing Standards. However Sobbe in Germany is the only Company at the moment which sells such igniters. The paper presents results of a comparative study between the 5 kJ Sobbe igniter and a 5 kJ igniter manufactured by Sirnex in Czech Republic. The study has been conducted under participation of BAM Federal Institute for Materials Research and Testing, Institute for Occupational Safety and Health of the German Social Accident Insurance (IFA). Berufsgenossenschaft Nahrungsmittel und Gastgewerbe (BGN) and Swiss Institute for Promotion of Safety and Security (Swissi). For the study six dusts from different product groups with various explosion severities and ignitabilities were chosen. The tests were carried out in the 20-L-sphere as well as in the l-m3-vessel. Maximum explosion overpressure Pmax, dust explosion constant Kst and lower explosion limit LEL were determined. Furthermore tests with a high speed and a thermal imaging camera were carried out, in order to compare burning time and flame pattern of Sobbe and Simex igniter. KW - Explosion characteristics of dusts KW - 20-L-sphere KW - 1-m³-vessel KW - Pyrotechnical igniter KW - Dust explosion testing KW - Explosionskenngrößen KW - Bestimmungsmethoden KW - 20-l-Kugel KW - 1-m³-Behälter KW - Pyrotechnischer Zünder KW - Sicherheitstechnische Kenngrößen PY - 2011 SN - 1347-9466 VL - 72 IS - 6 SP - 174 EP - 178 CY - Tokyo AN - OPUS4-25285 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Krietsch, Arne A1 - Scheid, Marc T1 - Brand- und Explosionsschutz bei nanoskaligen Stäuben N2 - Die Nanotechnologie gilt als die Wachstumsbranche der nächsten Jahrzehnte. Während die gesundheitlichen Wirkungen von nanoskaligen Materialien bereits in zahlreichen Studien und Forschungsvorhaben näher untersucht wurden und werden, sind die Erfahrungen und Erkenntnisse über Brand- und Explosionsgefahren von Stäuben im Nanometerbereich bzw. von Partikeln < 1 µm bislang noch kaum erforscht. Die Bestimmung sicherheitstechnischer Kenngrößen von Nanostäuben – die die Grundlage für eine Gefährdungsbeurteilung und das Auslegen von Schutzmaßnahmen bilden – erfolgte bislang nur in sehr geringem Umfang. Die Untersuchungen wurden zudem in Analogie zu den Verfahren für Mikrostäube durchgeführt. Es wurde jedoch weder überprüft, ob die für Mikrostäube etablierten Prüfverfahren für eine sichere Bewertung des Brenn- und Explosionsverhaltens geeignet sind, noch ob durch freigesetzten Staub bei einer entsprechenden Ermittlung der Kenngrößen Gesundheitsrisiken bestehen. Der Beitrag beschreibt den Stand des Wissens im Bereich Brand- und Explosionsschutz für Stäube im Nanometerbereich und berichtet über ein bei der BAM Bundesanstalt für Materialforschung und -prüfung laufendes Projekt zur Beseitigung der momentanen Defizite, gefördert von der Deutschen Gesetzlichen Unfallversicherung (DGUV) sowie verschiedenen Berufsgenossenschaften. KW - Explosionsschutz KW - Nanomaterialien KW - Sicherheitstechnische Kenngrößen PY - 2011 SN - 2191-0073 VL - 1 IS - 9 SP - 10 EP - 14 PB - Springer-VDI-Verl. CY - Düsseldorf AN - OPUS4-24336 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krietsch, Arne A1 - Scheid, Marc T1 - Brand- und Explosionsgefahren beim Umgang mit Nanostäuben und ultrafeinen Partikeln T2 - 58. Sitzung des Arbeitskreises "Brennbare Stäube" CY - Berlin, Germany DA - 2011-05-26 PY - 2011 AN - OPUS4-23828 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Scheid, Marc A1 - Krietsch, Arne T1 - Brand- und Explosionsgefahren bei der Handhabung nanokaliger Stäube T2 - Vortrag beim Treffen des Arbeitskreises "Erfahrungsaustausch Ex-Schutz-Dokument" des Fachausschuss Metall und Oberflächenbehandlung der DGUV/BG Holz und Metall CY - Alfeld, Germany DA - 2011-05-12 PY - 2011 AN - OPUS4-23697 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Bresch, Harald A1 - Dörfel, Ilona A1 - Steinborn, Gabriele A1 - Krietsch, Arne A1 - Langner, Jeanette A1 - Schmidt, Martin A1 - Österle, Werner A1 - Seeger, Stefan T1 - Physical-chemical characterization of NM105(P25) N2 - NM 105, Ti02 (P25) could not be ignited as dust layer and dispersed in air as dust/air-mixture as well. This dust is not dust explosible and the burning behaviour corresponds to Burning Class 1 (no Ignition). The results have shown that the tested sample is thus not combustible at all, because it is already oxidized completely. KW - OECD KW - WPMN KW - TiO2 KW - NM105 KW - P25 KW - Sponsorship programme PY - 2012 SP - 1 EP - 18 PB - Bundesanstalt für Materialforschung und -prüfung (BAM) CY - Berlin AN - OPUS4-27322 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krietsch, Arne A1 - Gothe, C. A1 - Scheid, Marc A1 - Krause, U. ED - Makhviladze, G. ED - Molkov, V. ED - Bradley, D. ED - Sunderland, P. ED - Tamanini, F. T1 - Determination of explosion behaviour of nano powders with modified 20-L-sphere test N2 - This paper describes a modified experimental setup for the test apparatus 20-L-Sphere (also known as 20-L Siwek Chamber), that enables the test samples to be kept under inert atmospheric conditions nearly until ignition. This setup was designed to allow the determination of safety characteristics of nano powders under most critical circumstances (e.g. minimisation of the influence of oxidation before the test itself). The aim of this modification was to determine, whether or not the current setup and procedures underestimate the explosion violence and ignitability of nano powders. For this purpose, two different methods, the so called inerting method and the modified method (using a special nozzle called mushroom nozzle) are used. Both methods are described in the paper. The work includes experimental results of micrometer dusts to validate the modified method. Moreover first results of nanometer iron and aluminium dusts are presented, which were kept at inert conditions until shortly before the ignition. The tested nano iron was found to react pyrophoric, as soon as it gets in contact with air, while the tested nano aluminium did not generally show such behaviour. Tests with nano aluminium using the inerting method revealed a higher pressure rise in comparison to the standard test procedure. This could suggest a different extent of passivation. To investigate this effect more closely, further testes with more nano powders are required. T2 - ISFEH7 - 7th International seminar on fire & explosion hazards CY - Providence, RI, USA DA - 05.05.2013 KW - Nano material KW - Dust explosion KW - Safety characteristics KW - Nanopowder PY - 2013 SN - 978-981-07-5936-0 SN - 978-981-07-5940-7 DO - https://doi.org/10.3850/978-981-07-5936-0_13-03 SP - 801 EP - 809 PB - Research publishing AN - OPUS4-28560 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krietsch, Arne A1 - Romahn, T.-M. A1 - Scheid, Marc A1 - Krause, U. ED - Pierucci, S. ED - Klemes, J.J. ED - De Rademaeker, E. ED - Fabiano, B. ED - Buratti, S.S. T1 - Modified setup of 20-L-sphere for the determination of safety characteristics of nano powders N2 - This paper describes a modified experimental setup for the test apparatus 20-L-Sphere (also known as 20-L Siwek Chamber), that enables the test samples to be kept under inert atmospheric conditions nearly until ignition. This setup was designed to allow the determination of safety characteristics of nanopowders under most critical circumstances (e.g. minimisation of the influence of oxidation before the test itself). The aim of this modification was to determine, whether or not the current setup and procedures underestimate the explosion violence and ignitability of nanopowders. The work includes experimental results of micrometer dusts to validate the modified setup. Moreover first results of nanometer iron and Aluminium dusts are presented, which were kept at inert conditions until shortly before the ignition. The tested nano iron was found to react pyrophoric, as soon as it gets in contact with air, while the tested nano Aluminium did not generally show such behaviour. T2 - 14th International symposium on loss prevention and safety promotion in the process industries CY - Florence, Italy DA - 12.05.2013 KW - Dust explosion KW - Nanopowder PY - 2013 SN - 978-88-95608-22-8 DO - https://doi.org/10.3303/CET1331135 SN - 1974-9791 N1 - Serientitel: Chemical engineering transactions – Series title: Chemical engineering transactions IS - 31 SP - 805 EP - 810 PB - AIDIC, Associazione Italiana di Ingegneria Chimica CY - Milano AN - OPUS4-28561 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krietsch, Arne A1 - Scheid, Marc A1 - Krause, U. A1 - Gothe, Ch. T1 - Determination of Explosion Behavior of Nano Powders with Modified 20-L-Sphere Test T2 - 7th International Symposium on Fire and Explosion Hazards CY - Providence, RI, USA DA - 2013-05-06 PY - 2013 AN - OPUS4-28528 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krietsch, Arne A1 - Scheid, Marc A1 - Krause, U. A1 - Romahn, T.-M. T1 - Modified Setup of 20-L-Sphere for the Determination of Safety Characteristics of Nano Powders T2 - 14th International Symposium on Loss Prevention and Safety Promotion in the Process Industries CY - Florence, Italy DA - 2013-05-13 PY - 2013 AN - OPUS4-28532 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -