TY - CHAP A1 - Kasch, Thomas A1 - Binder, Christian A1 - Woitzek, Andreas A1 - Szypkowski, Marko A1 - Treisch, N. ED - Davis, S. E. ED - Steinberg, Th. A. T1 - Oxygen endurance testing of oxygen cylinder valves N2 - Cylinder valves for oxygen service that meet the standard DIN EN ISO 10297 should be safe, if properly handled by the user. In the last few years, however, the number of incidents with oxygen valves that has been reported to Federal Institute for Materials Research and Testing (BAM) has increased. According to the incident reports, incorrect handling can be ruled out. People were seriously injured and in most cases, the causes of these incidents were not clear. Very often, such incidents occurred during opening and closing of the valves. Therefore, the technical-scientific community has put the existing test methods for type testing more and more into question. Besides other mandatory tests, the above-mentioned standard allows to perform the endurance test with air or with nitrogen. This is appropriate for all other gases but not for oxygen. Up to now, this test does not consider the fact that cylinder valves also contain nonmetallic seat materials and lubricants that may react with oxygen in a dangerous way. Because of this unsatisfactory situation, BAM initiated a research project to perform endurance testing of cylinder valves for oxygen service much more practice related with oxygen. This test simulates very well real life situations when the cylinder valve is opened or closed. The first part of this project was the development of a new oxygen operated endurance tester in accordance with DIN EN ISO 10297. In a second part, endurance testing of valves with air and with oxygen was performed and the results were compared. In addition, another mandatory test of the standard, the oxygen pressure surge test was carried out on new valves and on valves that had undergone endurance tests with air or oxygen, to see the influence on the burn-out safety of such pre-stressed valves. This paper presents the main results of the project. The findings clearly speak for implementing the oxygen endurance test not only to DIN EN ISO 10297 but also to various other standards to increase the burn-out safety of oxygen cylinder valves. KW - Endurance testing KW - High pressure oxygen KW - Nonmetallic material KW - Lubricant KW - Ignition source KW - Incident research KW - Oxygen pressure surge PY - 2016 SN - 978-0-8031-7637-9 U6 - https://doi.org/10.1520/STP1596-EB SN - 0899-6652 SN - 0066-0558 VL - 14 SP - 393 EP - 404 PB - ASTM International CY - West Conshohocken, PA. ET - STP 1596 AN - OPUS4-38243 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -