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About This Item
Full Description
- Continue to monitor field use and incorporate changes to requirements, standards and codes that reflect knowledge gained for composite pressure vessels
- Use a failure modes and effects analysis (FMEA) approach to standards, using the knowledge gained from field experience,
- Develop standards for composite pressure vessels that are more performance based to improve both safety and performance,
- Address requirements using performance testing, not by using excessive safety factors,
- Use stress ratios for the various reinforcing fibers that accurately reflect their stress rupture and fatigue characteristics to achieve high reliability,
- Harmonize testing requirements where practical,
- Use qualification tests that are appropriate for the application and for the materials and design features of the pressure vessels being used, and
- Consider using fleet leader programs for new materials, designs or applications if there is likely to be a significant safety issue
The use of performance-based requirements is discussed, as is the background of safety factors used for various reinforcing fibers. Recommendations are made for validation testing of materials and pressure vessels, with consideration for failure modes and effects analysis (FMEA) involving the field use of the vessels. Cyclic fatigue and stress rupture are discussed, with examples of laboratory testing and correlation from field experience.