TY - JOUR A1 - Schröder, Volkmar A1 - Molnarne, Maria T1 - Flammability of gases in focus of European and US standards N2 - The presentation will discuss the difference between EU and US standards for the determination of explosion (flammability) limits and limiting oxygen concentration. Small differences observed in measured values can be traced back to the different test apparatuses and criteria. The discrepancies can be much greater in the case of limiting oxygen concentration because of the high amount of inert gases and the corresponding low laminar burning velocities. The paper describes some examples and the influence of the chosen criteria on the results. The European and US standards use the criteria of flame propagation in open test vessels and of pressure rise in closed ones. The examples discussed show that flame propagation is still possible at very small pressure rise values, as observed much below the pressure rise criterion of usual standards. However, flame propagation in a process plant can cause an accident or explosion and must be avoided. Therefore, the flame propagation criterion is recommended to be used in chemical safety engineering. The European safety database CHEMSAFE contains expertevaluated safety data for cases where the determination method and criteria are known. Flammability characteristics based on the pressure rise criterion may suffice in certain cases, e.g. for explosion protection in closed vessels without any connecting pipes. KW - Flammability KW - Limiting oxygen concentration KW - Test methods KW - Standards PY - 2017 DO - https://doi.org/10.1016/j.jlp.2017.05.012 SN - 0950-4230 SN - 1873-3352 VL - 48 SP - 297 EP - 304 PB - Elsevier CY - Amsterdam AN - OPUS4-40980 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Molnarne, Maria A1 - Wilrich, Cordula A1 - Holtappels, Kai T1 - Chemically unstable gases and gas mixtures - new categories in the GHS N2 - In connection with the use of chemically unstable gases (especially acetylene and ethylene oxide) accidents keep on happening - amongst them also quite serious ones. These gases are known to be chemically unstable. A chemically unstable sas is a flammable gas that is able to react exolosivelv even in the absence of air or oxveen. The investigation of accidents showed that the Chemical instability of flammable gases played an important role in the severity of accidents. Therefore, this hazardous property was included in the global harmonizatiön of the Classification of Chemicals. The Classification of chemically unstable flammable gases and mixtures is an amendment to Chapter 2.2 “Flammable gases” of the UN Globally Harmonized System of Classification and Labelling of Chemicals (GHS), because most chemically unstable gases are flammable as well. The proposal to add them to the GHS originated from the experts of an informal working group of the UN Sub-Committee of Expert on the GHS (UNSCEGHS) headed by BAM, Germany. The UNSCEGHS has decided to include it in the Fourth Revised Edition of the GHS. The respective method for determining whether a gas is chemically unstable or not, is included in the UN Manual of Tests and Criteria. This paper presents some experimental investigations of these gases, the test methods, examples of new classifications and results from CHEMSAFE T2 - 14th Annual symposium, Mary Kay O´Connor process safety center - Beyond regulatory compliance: making safety second nature CY - College Station, TX, USA DA - 25.10.2011 KW - Chemically unstable gases KW - GHS KW - Chemisch instabile Gase PY - 2011 SP - 871 EP - 882 AN - OPUS4-24913 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Molnarne, Maria T1 - Chemically Unstable Gases and Gas Mixtures - New Categories in the GHS T2 - International Symposium Beyond Regulatory Compliance 2011, Making Safety Second Nature CY - College Station, TX, USA DA - 2011-10-25 PY - 2011 AN - OPUS4-24200 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Molnarne, Maria A1 - Schröder, Volkmar T1 - Comparison of calculated data for the flammability and the oxidation potential according to ISO 10156 with experimentally determined values N2 - The classification of flammable gas mixtures is based on either testing or calculation methods proposed by the revised international standard ISO 10156. This standard is used for classification of physical hazards in Chapters 2.2 and 2.4 of the UN Globally Harmonized System of Classification and Labelling of Chemicals (GHS) and in the UN Recommendations on Transport of Dangerous Goods (TDG). The test methods of flammability and oxidizing potential in this standard were developed by BAM. Earlier versions of this standard are not based on triangular diagrams and on the reference combustible substance 'ethane'. The old material characteristics, especially in case of oxidizing potential, are based mostly on practical experience without any quantifiable test results. First time it is possible to compare experimental results from the CHEMSAFE database with the newly developed calculation method. In this paper the basic principles of the calculation methods are presented and the methods are validated by examples. A comparison of experimental flammability data with classification results gained by the calculation methods of ISO 10156 is demonstrated. KW - Gas classification KW - GHS KW - Flammability limit KW - Oxidizing potential KW - Calculation method PY - 2011 DO - https://doi.org/10.1016/j.jlp.2011.06.024 SN - 0950-4230 SN - 1873-3352 VL - 24 IS - 6 SP - 900 EP - 907 PB - Elsevier Ltd. AN - OPUS4-24176 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Molnarne, Maria A1 - Schröder, Volkmar T1 - Comparison of flammability and oxidizing power of gas mixtures using the ISO 10156 with measured flammability data T2 - 13th Annual symposium, Mary Kay O´Connor process safety center "Beyond regulatory compliance: making safety second nature" CY - College Station, Texas, USA DA - 2010-10-26 KW - Flammability KW - Fire KW - Explosion limits KW - International standards PY - 2010 SN - 978-0-615-38129-9 SP - 230 EP - 246 AN - OPUS4-22465 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Molnarne, Maria A1 - Schröder, Volkmar T1 - Comparision of Flammability and Oxidinzing Power of Gas Mixtures using the ISO 10156 with measured Flammability Data T2 - Mary Kay O' Connor Process Safety Center International Symposium, College Station CY - College Station, TX, USA DA - 2010-10-26 PY - 2010 AN - OPUS4-22309 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Molnarne, Maria T1 - Explosion protection - using the database CHEMSAFE T2 - 12th Annual symposium, Mary Kay O´Connor Process Safety Center "Beyond regulatory compliance: making safety second nature" CY - College Station, Texas, USA DA - 2009-10-27 KW - CHEMSAFE KW - Explosion protection PY - 2009 SN - 978-0-692-00459-3 IS - Chapter "Explosion - I" SP - 686 EP - 696 AN - OPUS4-20720 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Grätz, Rainer A1 - Molnarne, Maria T1 - Gefahren vermeiden und begrenzen - Ein kurzer Abriss zu den Grundlagen des Explosionsschutzes KW - Explosionsschutz KW - Grundlagen KW - Regelwerke PY - 2009 SN - 1436-2597 VL - 12 IS - 11-12 SP - 24 EP - 26 PB - GIT-Verl. CY - Darmstadt AN - OPUS4-20499 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Molnarne, Maria T1 - Explosion Protection Using the Database CHEMSAFE T2 - Mary Kay O'Connor Process Safety Center, International Symposium "Beyond Regulatory Compliance, Making Safety Second Nature" CY - College Station, TX, USA DA - 2009-10-27 PY - 2009 AN - OPUS4-20442 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Molnarne, Maria A1 - Schröder, Volkmar T1 - Chemical safety database - application for flammability limits of biogases N2 - The article addresses safety characteristics of hazardous substances, particularly biogas plants that require specific safety measures. KW - Explosion limit KW - Biogas KW - CHEMSAFE KW - Flammability limit KW - Explosion protection KW - Renewable energy PY - 2009 IS - Spring 2009 SP - 20 EP - 26 PB - Fire & safety group CY - Cedar Grove, NJ, USA AN - OPUS4-19614 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -