Actions for Proactive Mitigation of PCTFE-Related Ignition Hazards in Oxygen Systems : I. Development of a Voluntary Consensus Standard Specification to Control Property Variation in Finished PCTFE Parts

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Proactive Mitigation of PCTFE-Related Ignition Hazards in Oxygen Systems : I. Development of a Voluntary Consensus Standard Specification to Control Property Variation in Finished PCTFE Parts / JM. Waller, HL. Julien, BE. Newton, HD. Beeson

Conference Author
Flammability and Sensitivity of Materials in Oxygen-Enriched Atmospheres: 11th Volume (11th : 2006 : Washington, DC)
Physical Description
1 online resource (15 pages) : illustrations, figures, tables
Additional Creators
Waller, JM., Beeson, HD., Julien, HL., Newton, BE., American Society for Testing and Materials, and ASTM International
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Summary
Revelations of dimensional instability in polychlorotrifluoroethylene (PCTFE) semifinished articles and finished parts raised concerns that leaks or part failure could occur during service, leading to catastrophic component or system failure, especially in high-pressure gaseous oxygen systems where flow friction, flow resonance, or kindling chain ignition mechanisms are operative. These concerns culminated in the release of an internal NASA Kennedy Space Center Problem Advisory and a Government-Industry Data Exchange Program Problem Advisory on PCTFE. Release of the advisories coincided with a task group study examining the factors contributing to property variation in PCTFE. More specifically, the effect of resin grade, process route, annealing method, and machining on dimensional stability, molecular weight, and crystallinity was determined. To better control dimensional stability, for example, a Biot-Fourier method is described that allows calculation of the time needed for PCTFE parts of known geometry to reach thermal equilibrium during annealing. A voluntary consensus material specification was then implemented to control properties in finished PCTFE parts used in aerospace applications.
Dates of Publication and/or Sequential Designation
Volume 2006, Issue 1479 (January 2006)
Subject(s)
Other Subject(s)
ISBN
9780803155138 (e-ISBN)
9780803134058
0803134053
Digital File Characteristics
text file PDF
Bibliography Note
Includes bibliographical references 25.
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Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
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Also available in PDF edition.
Reproduction Note
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 2006. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
Technical Details
Mode of access: World Wide Web.
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ASTM International PDF Purchase price USD25.
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