Download or read book Ignition of Contaminants by Impact of High Pressure Oxygen written by L. Bamford and published by . This book was released on 1988 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ignition of hydrocarbon-based oil films by the impact of high-pressure oxygen has been studied as part of an evaluation of cleanliness requirements for oxygen systems. Stainless steel lines contaminated on the inside surface with known quantities of oil were closed at one end, attached to a high-pressure (52 MPa) oxygen system, and pressurized by opening a high-speed valve. Ignition of the oil films was detected by a photocell attached to the closed end of the line.
Download or read book Flammability and Sensitivity of Materials in Oxygen enriched Atmospheres written by Dennis W. Schroll and published by ASTM International. This book was released on 1988 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceeding held at Churchill College, Cambridge, England, April 1987. A reference for both the skilled and the uninitiated in the concepts and practices for the design and maintenance of all types of oxygen systems. Cov five areas: ignition of metals, nonmetal ignition, material selection for oxygen.
Download or read book Flammability and Sensitivity of Materials in Oxygen enriched Atmospheres written by David B. Hirsch and published by ASTM International. This book was released on 2006 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pneumatic Impact Ignition of Sebum Oil Film in High Pressure Oxygen written by SA. Tapia and published by . This book was released on 2006 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Whenever oxygen systems are assembled or maintained, a risk of introducing contamination arises. Potential contaminants include oils from a person's hands and body left behind in the form of fingerprints. The oil on the surface of skin is a complex mixture of sebum oil, lipids, sweat, and environmental materials. In high-pressure systems, heat from rapid pressurization is a high-risk ignition mechanism for the sebum contaminant. The rapid pressurization or pneumatic impact ignition of hydrocarbon-based oil contaminant in high-pressure oxygen has been widely studied. This study investigated the rapid pressurization ignition of sebum contaminant in high-pressure oxygen. The pneumatic impact ignition test of sebum contaminant was conducted according to NASA-STD-6001 Test 14. The ends of stainless steel cylindrical rods were coated with synthetic sebum at varying surface concentrations, and impacted with 27.6 MPa oxygen. The results show that there is a threshold level of sebum contaminant for ignition by rapid pressurization. The level of sebum contaminant that can be expected to be deposited by handling oxygen system components, an analysis on sebum oil properties and associated fire hazards, and the threshold levels of sebum contaminant required for rapid pressurization ignition in a high-pressure oxygen system are presented and discussed.
Download or read book Flammability and Sensitivity of Materials in Oxygen enriched Atmospheres written by B. E. Newton and published by ASTM International. This book was released on 2003 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Promoted Ignition Testing of Metallic Filters in High Pressure Oxygen written by Greg A. Odom and published by . This book was released on 2009 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Currently, no test standard exists for evaluating the ignition tolerance and fault tolerance of metallic filters in high-pressure oxygen. Filters are a critical component in oxygen systems to ensure system cleanliness and mitigate ignitions by particle impact and contamination. However, filters are at risk to these same ignition mechanisms and fires have occurred in service. A new test method was developed using ASTM Standard G175 Phase 2 as a basis. The test subjects a pre-contaminated filter to a forced ignition event using an ignition pill while the filter is maintained at elevated pressure. Prior to testing, contaminant was applied to the filter element and was also placed at the filter inlet. This additional contaminant was based on contaminant that could potentially accumulate in a filter over time. This contaminant consisted of aluminum powder, iron particles, and perfluorinated lubricant. An ignition pill, consistent with ASTM Standard G175 Phase 2, was located on the upstream side of the filter. A back pressure was applied downstream of the ignition pill to ensure that the filter was pressurized during the ignition and burning of the pill. Testing was performed on brass and stainless steel filters of the same design using an oxygen shock to ignite the ignition pill at a test pressure greater than the back pressure applied to the filter. The brass filters safely contained the ignition event without breaching through the filter element or body. For the stainless steel filters, the ignition event kindled the filter element and burned through the filter body. This testing showed that the ignition fault tolerance of the brass filters was far superior to that of the stainless steel filters, which was consistent with the relative flammability of these metallic materials, and therefore verified the test methodology.
Download or read book Flammability and Sensitivity of Materials in Oxygen enriched Atmospheres written by Joel M. Stoltzfus and published by ASTM International. This book was released on 1993 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flammability and Sensitivity of Materials in Oxygen enriched Atmospheres written by Dwight D. Janoff and published by ASTM International. This book was released on 1995 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Evaluation of High pressure Oxygen Systems written by J. V. Baum and published by . This book was released on 1962 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flammability and Sensitivity of Materials in Oxygen Enriched Atmospheres written by and published by ASTM International. This book was released on 1983 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Safe Use of Oxygen and Oxygen Systems written by and published by ASTM International. This book was released on with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ignition of PTFE Lined Hoses in High Pressure Oxygen Systems written by H. Barthelemy and published by . This book was released on 1988 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of their flexibility and robust construction, high pressure hoses are a part of the equipment for industrial gas producers and users need to fill and to use gas cylinders. For oxygen service, a polytetrafluoroethylene (PTFE) lined hose is generally used because PTFE is one of the best ignition resisting plastic materials in oxygen. This type of hose has been used successfully in gaseous oxygen systems by the major gas producing companies for many years, but recently many incidents have been reported in Europe involving PTFE lined hose ignitions, mainly associated with oxygen distribution manifolds. In this paper we try to analyze the different causes of PTFE hose ignitions in oxygen service (oil contamination, particle effects, heat of compression, and so forth) taking into account the incident reports. Numerous tests have been carried out in L'air Liquide's laboratory (oil contamination measurements, pneumatic impact tests with oxygen, and so forth) on many hoses produced by many manufacturers from different countries. Results and types of failure have been analyzed by taking into account the effect of hose quality, particles, fittings, pressure, and temperature. It appears that ignitions reported on oxygen client manifolds are probably due to an "adiabatic compression" process, though they were at times initially attributed to particle effects (particle impact or static electricity) or to poor mechanical behavior. To prevent such incidents, solutions are proposed for medical and industrial applications.
Download or read book Flammability and Sensitivity written by and published by ASTM International. This book was released on with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flammability and Sensitivity of Materials in Oxygen enriched Atmospheres written by and published by . This book was released on 1983 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flammability and Sensitivity of Materials in Oxygen enriched Atmospheres written by Joel M. Stoltzfus and published by ASTM International. This book was released on 1989 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Proceedings of the Fourth International Symposium on [title] held in Las Cruces, NM, April 1989. Presents 22 papers on the special hazards associated with the use of oxygen. Contains recent literature on flammability and compatibility of materials in oxygen, design of oxygen components and systems, and test method development and evaluation. Illustrated. Annotation copyrighted by Book News, Inc., Portland, OR.
Download or read book Filters for Use in High Pressure Oxygen Service Qualification and Test Methods written by JP. Schaaff and published by . This book was released on 2003 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filters are very often used for oxygen equipment. Their role is normally to prevent downstream contamination of components by particles and dust, and thus may help to prevent ignition caused by particle impact or static electricity buildup. They also create a pressure drop upstream from internal components, which may help decrease the risk of ignition by adiabatic compression. However, filters are sometimes the cause of ignition. Lack of maintenance or poor design can lead to the creation of local restrictions or dead ends and thus increase the risk of ignition at the filter level due to adiabatic compression. They can also fail and suddenly release blocked contamination that can possibly cause ignition by particle impact. In this paper, we are proposing a test method to qualify some type of filters for oxygen service equipments. It is particularly important to check that they are able to resist particle impacts.
Download or read book 28th International Symposium on Shock Waves written by Konstantinos Kontis and published by Springer Science & Business Media. This book was released on 2012-03-22 with total page 1122 pages. Available in PDF, EPUB and Kindle. Book excerpt: The University of Manchester hosted the 28th International Symposium on Shock Waves between 17 and 22 July 2011. The International Symposium on Shock Waves first took place in 1957 in Boston and has since become an internationally acclaimed series of meetings for the wider Shock Wave Community. The ISSW28 focused on the following areas: Blast Waves, Chemically Reacting Flows, Dense Gases and Rarefied Flows, Detonation and Combustion, Diagnostics, Facilities, Flow Visualisation, Hypersonic Flow, Ignition, Impact and Compaction, Multiphase Flow, Nozzle Flow, Numerical Methods, Propulsion, Richtmyer-Meshkov, Shockwave Boundary Layer Interaction, Shock Propagation and Reflection, Shock Vortex Interaction, Shockwave Phenomena and Applications, as well as Medical and Biological Applications. The two Volumes contain the papers presented at the symposium and serve as a reference for the participants of the ISSW 28 and individuals interested in these fields.
