TY - JOUR A1 - Bethke, John A1 - Goedecke, Thomas A1 - Jahnke, Wolfgang T1 - Barrieren manchmal notwendig JF - Gefährliche Ladung KW - Permeation KW - Gefahrguttransport KW - Container KW - Untere Explosionsgrenze KW - Explosionsfähiges Gemisch KW - Luftwechselrate KW - Klimamessfahrt PY - 2008 SN - 0016-5808 VL - 4 SP - 26 EP - 29 PB - Storck CY - Hamburg AN - OPUS4-17466 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schlick-Hasper, Eva A1 - Jahnke, Wolfgang A1 - Drousch, Björn A1 - Goedecke, Thomas A1 - Kraume, M. T1 - Experimental investigations concerning the sensitivity of the leakproofness test for dangerous goods packagings relating to the leak diameter JF - Packaging technology & science N2 - The objective of this experiment was to verify that in regards to the leakproofness bubble test for packagings of dangerous goods, a reduction of the air overpressure from 0.2 to 0.1 bar can be compensated for by reducing the water surface tension to a value of approximately 33.2 mN/m by adding a wetting agent. It was experimentally proven that this method will yield the same leak diameters. This is important to avoid irreversible deformations during the leaktesting of intermediate bulk containers (IBCs) while using a test overpressure of 0.2 bar. Bubble test experiments were carried out on artificial borehole-shaped leaks manufactured of two different materials high density polyethylene (HDPE) and stainless steel by ultrashort pulse laser technology and with two different immersion test liquids (deionized water and a 0.1% Lutensol FSA fabric softener active 10 solution). The characteristic diameters of the boreholes investigated were from 11.5 to 30.3 µm in length. KW - Dangerous goods packaging KW - Leakproofness test KW - Bubble test KW - Leak KW - Ultrashort pulse laser PY - 2014 DO - https://doi.org/10.1002/pts.2029 SN - 0894-3214 VL - 27 IS - 4 SP - 327 EP - 339 PB - Wiley CY - Chichester, UK AN - OPUS4-30502 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bethke, John A1 - Goedecke, Thomas A1 - Jahnke, Wolfgang T1 - Permeation through plastic dangerous goods packaging during transport in freight containers - Detection of potentially explosive mixtures in containers under normal conditions of carriage JF - Packaging technology & science N2 - The key point within the scope of this research project was to find out whether there was a risk of creating an explosive atmosphere by permeation of flammable liquid compounds during transport of dangerous goods in freight containers under normal conditions of carriage. Therefore, all aspects that had an influence on the formation of such an atmosphere had to be considered. The most important influencing factors were permeation, air change in the freight container and ambient temperature. The first step was to investigate the permeation with different packaging materials, charge and temperatures. Furthermore, the air change rates of different freight containers were measured. A few climate tests with containers on ships, e.g. to Singapore, were performed to assess normal conditions of carriage. Another important point was measuring the solvent (toluene) concentration in the gas phase in a freight container loaded with plastic intermediate bulk containers (IBCs) filled with toluene. To confirm that the measured values were in the right range, the toluene concentration in the gas phase in a container was calculated with different packaging materials, air change rates and temperatures. The results of the measurements and calculations have shown that safety layers in the packaging wall, e.g. the copolymer of ethylene and vinyl alcohol (EVOH) and polyamide, can reduce the rate of permeation by more than a decimal power, but the lower explosive limit of toluene is easily reached within a few hours at 40°C charge temperature if there is no barrier. KW - Permeation KW - Air change KW - Dangerous goods KW - Lower explosive limit KW - Freight container PY - 2013 DO - https://doi.org/10.1002/pts.994 SN - 0894-3214 VL - 26 IS - 1 SP - 1 EP - 15 PB - Wiley CY - Chichester, UK AN - OPUS4-31075 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Goedecke, Thomas A1 - Bethke, John A1 - Jahnke, Wolfgang A1 - Otremba, Frank ED - Karl-Friedrich Ziegahn, T1 - Ermittlung explosionsfähiger Gemische beim Gefahrguttransport unter normalen Beförderungsbedingungen T2 - 38. Jahrestagung der GUS 2009 - Umwelteinflüsse erfassen, simulieren, bewerten T2 - 38. Jahrestagung der GUS 2009 - Umwelteinflüsse erfassen, simulieren, bewerten CY - Karlsruhe DA - 2009-03-18 KW - Permeation KW - Packagings for dangerous goods KW - Freight containers KW - Explosive atmosphere KW - Solvents PY - 2009 SN - 978-3-9810472-7-1 IS - V 19 SP - 227 EP - 237 PB - DWS Werbeagentur und Verlag GmbH CY - Karlsruhe AN - OPUS4-23256 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schlick-Hasper, Eva A1 - Bethke, John A1 - Jahnke, Wolfgang A1 - Drousch, Björn A1 - Goedecke, Thomas A1 - Kraume, M. T1 - Maximum gauge pressure in dangerous goods packagings under normal conditions of carriage - comparison of direct measurement and calculation JF - Packaging technology & science N2 - The objective of this work was to determine the maximum gauge pressure in the vapour phase above the liquid in different design types of dangerous goods packagings under normal conditions of carriage. The design types investigated were steel and plastic packagings with a volume of approximately 6 l. Two different methods were applied. In method 1, the pressure inside the packaging filled with a certain filling substance (dichloromethane) was directly measured under simulated conditions of carriage (degree of filling: 90%; filling temperature: 15°C; temperature during storage: 31°C). The maximum measured gauge pressures were between 89 mbar for a light plastic jerrican and 336 mbar for a steel drum. In method 2, the gauge pressure was calculated. The consideration of a rigid packaging combined with the assumption of a vapour pressure of zero during filling and sealing can serve as a worst case scenario. The calculated gauge pressure is approximately 1061 mbar. This procedure leads to the highest safety factor and does not require any experimental investigations. For a more realistic approximation of the gauge pressure of a non-rigid packaging, a packaging-specific function of relative expansion can be used, which is determined by a hydraulic pressure test. The calculated values ranged from 105 to 347 mbar. Method 2 provides conservative results. No hazardous filling substance is needed, and it allows a prediction of gauge pressure for other temperatures, substances and filling degrees. Therefore, this method could serve as alternative to UN Model Regulations 6.1.5.5.4 (a). KW - Dangerous goods packagings KW - Gauge pressure KW - Overpressure KW - Relative expansion KW - Data loggers KW - Normal conditions of carriage KW - Gefahrgutverpackungen KW - Überdruck KW - Relative Ausdehnung KW - Datenlogger KW - Normale Beförderungsbedingungen PY - 2015 DO - https://doi.org/10.1002/pts.2111 SN - 0894-3214 VL - 28 IS - 5 SP - 437 EP - 460 PB - Wiley & Sons, Ltd. CY - Chichester, UK AN - OPUS4-33108 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schlick-Hasper, Eva A1 - Bethke, John A1 - Jahnke, Wolfgang A1 - Goedecke, Thomas A1 - Kraume, M. T1 - Normale Beförderungsbedingungen beim Gefahrguttransport im Frachtcontainer und ihr Einfluss auf den inneren Überdruck in Gefahrgutverpackungen T2 - 44. Jahrestagung der GUS 2015 N2 - Der innere Überdruck, der sich unter Beförderungsbedingungen im freien Dampfraum einer Gefahrgutverpackung bildet, die mit einer gefährlichen Flüssigkeit gefüllt ist, hängt von verschiedenen Faktoren ab: Den spezifischen Stoffeigenschaften des jeweiligen Füllguts, dem Füllgrad, der Nachgiebigkeit der Verpackungsbauart, der Befülltemperatur und der Temperatur bei Beförderungsbedingungen. Zu den normalen Beförderungsbedingungen von befüllten Gefahrgutverpackungen zählt der interkontinentale Transport in Frachtcontainern. Es werden die Ergebnisse einer Klimamessfahrt vorgestellt, die mit einem instrumentierten Frachtcontainer auf der Fahrt von Hamburg nach Singapur und zurück gewonnen wurden. Hierdurch lassen sich durchschnittliche und maximale Beförderungstemperaturen beim interkontinentalen Containertransport ermitteln. Es werden Modellgleichungen vorgestellt, mit denen sich für verschiedene Annahmen der sich einstellende Überdruck in einer Gefahrgutverpackung berechnen lässt. T2 - 44. Jahrestagung der GUS 2015 CY - Stutensee-Blankenloch, Germany DA - 25.03.2015 KW - Gefahrgutverpackungen KW - Frachtcontainer KW - Überdruck PY - 2015 SN - 978-3-9816286-4-7 SP - 179 EP - 193 AN - OPUS4-33072 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Eiben, Mario A1 - Schmidt, Anita A1 - Menrad, Andreas A1 - Jahnke, Wolfgang A1 - Goedecke, Thomas T1 - Validation of an alternative method for testing the chemical compatibility of liquids with polyethylene packagings for dangerous goods JF - Packaging technology & science N2 - Safety risks may ensue when the chemicals contained in polyethylene packagingsa age and damage them. To prevent subsequent accidents, the European Dangerous Goods Regulations have laid down requirements for testing the chemical compatibility of liquid dangerous goods transported in polyethylene packagings. The test procedures include 6 months in which the chemical is prestored in the packaging. After this time, the respective design-type tests are performed. Alternative methods with so-called standard liquids, simulating the different types of damaging effects, are also possible. If a packaging has successfully passed the design type tests with a standard liquid, other dangerous goods may also be transported in this packaging, as long as it is demonstrated that they have a less damaging effect than the standard liquid. However, in this area there is only little information and research available. A new potentially effective and time-saving method for comparing the stress crack damaging influence of liquids with standard liquids was proposed by a major German chemical company. The validation of this method, which was carried out on two polyethylene materials, showed the general applicability of the method. Two kinds of wetting solutions were applied to simulate cracking under stress. The influence of prestorage, test temperatures, wetting agents and material was examined. FEM calculations were carried out to ascertain the influence of the sample shape. KW - Dangerous goods packagings KW - Chemical compatibility testing KW - HDPE KW - Environmental stress cracking KW - ESCR PY - 2013 DO - https://doi.org/10.1002/pts.1989 SN - 0894-3214 VL - 26 IS - 7 SP - 385 EP - 398 PB - Wiley CY - Chichester, UK AN - OPUS4-29400 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -