TY - JOUR A1 - Binder, Christian A1 - Arlt, Karin A1 - Brock, Thomas A1 - Hartwig, Peter A1 - Hesse, Olaf A1 - Kasch, Thomas T1 - The importance of quality assurance and batch testing on nonmetallic meaterials used for oxygen service JF - Journal of ASTM International N2 - In oxygen components, even for high pressure oxygen service, it is possible to use organic seals, lubricants, or filling liquids, provided their oxygen compatibility has been checked. However, fire incidents in oxygen systems still occur because these materials ignite and burn. There are many reasons, such as incorrect design, contamination, faulty operation, unsuitable materials, etc., why this happens. Another cause that is overseen very often is proper maintenance on the user´s side. It is very important to replace in a component a worn out seal by the same one with identical oxygen compatibility properties. On the part of the producer or distributor of materials, batch testing and also a quality assurance system play a key role in the safety of an oxygen component. Any change in the manufacturing process of a material, or in its composition, and even its further processing may have an impact on its oxygen compatibility and finally on the component in which it is used. Numerous investigations by BAM over decades reveal the influence of minor constituents and fillers on a material´s oxygen compatibility. The test results in this paper show how important it is to regularly perform batch testing on nonmetallic materials used for oxygen service and to have a quality assurance system that helps minimize incidents where unsuitable materials are chosen by accident. KW - Oxygen compatibility KW - Nonmetallic materials KW - Pneumatic impact KW - Flammability KW - Components KW - Maintenance KW - Batch testing KW - Quality assurance PY - 2009 DO - https://doi.org/10.1520/JAI102309 SN - 1546-962X VL - 6 IS - 8 SP - 1 EP - 8 PB - American Society for Testing and Materials CY - West Conshohocken, Pa. AN - OPUS4-20740 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Helmerich, Rosemarie A1 - Kühn, B. A1 - Nussbaumer, A. T1 - Assessment of existing steel structures - A guideline for estimation of the remaining fatigue life JF - Structure & infrastructure engineering N2 - In many countries and regions, traffic infrastructure projects suffer from low funding. The budget is tight for new infrastructure building and, thus, the importance of inspection, maintenance and assessment of the existing traffic infrastructure increases. A new fatigue assessment guideline for the estimation of the remaining fatigue life of steel bridges has been written by technical committee 6 of the European Convention of Constructional Steelwork (ECCS). It will be a useful tool for the complementation of bridge management systems, used commonly for condition assessment. Design specifications and rules are harmonised throughout Europe. They are under constant development, but there is still a lack of forwarding and concentrating experiences as well as developing rules for the fatigue assessment on existing steel structures. This paper presents a guideline with a proposed fatigue assessment procedure for existing steel structures embedded in information about old materials and non-destructive testing methods for the evaluation of details (ECCS 2004, Assessment of existing steel structures). Particular attention is paid on remedial measures which are proposed for weak details and damages caused by fatigue. The developed fatigue assessment procedure can be applied to existing steel structures under cyclic loading in general, but the guideline concentrates on the existing traffic infrastructure made from old steel, because of the public importance. The proposed procedure summarizes, regroups and arranges the knowledge in the field of assessment on existing steel to be applied by practicing engineers. The procedure is a milestone in knowledge transfer from a state of scientific knowledge to state-of-the-art. KW - Fatigue KW - Assessment KW - Maintenance KW - Reliability KW - Material KW - Old steel KW - Remedial measures KW - Existing steel structures PY - 2007 SN - 1573-2479 SN - 1744-8980 VL - 3 IS - 3 SP - 245 EP - 255 PB - Taylor & Francis CY - London AN - OPUS4-15042 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -