Prediction of failure behavior of a welded pressure vessel containing flaws during a hydrogen-charged burst test
- Powertech Labs. Inc., Surrey, British Columbia (Canada)
- Amoco Corp., Naperville, IL (United States)
- CANMET, Ottawa, Ontario (Canada). Metals Technology Labs.
- Mobil Research and Development Corp., Farmers Branch, TX (United States)
- Praxair, Inc., Tonawanda, NY (United States)
An industry-government collaborative program was carried out with an aim to promoting the acceptance of fracture mechanics based fitness-for-service assessment methodology for a service-damaged pressure vessel. A collaborative round robin exercise was carried out to predict the fracture behavior of a vessel containing hydrogen damage, fabrication related lack-of-fusion defects, an artificially induced fatigue crack and a localized thinned area. The fracture assessment procedures used include the US ASME Material Property Council`s PREFIS Program based on the British Standard (BS) Published Document (PD) 6493, ASME Section XI and The Central Electricity Generating Board (CEGB) R6 approach; The welding Institute (TWI) CRACKWISE program (based on BS PD6493 Level 2 approach), a variant of the R6 approach, J-tearing instability approaches, various J-estimation schemes, LEFM approach and simplified stress analysis. Assessments were compared with the results obtained from a hydrogen charged burst test of the vessel. Predictions, based on the J-tearing approach, compared well with the actual burst test results. Actual burst pressure was about five times the operating pressure.
- OSTI ID:
- 403289
- Report Number(s):
- CONF-960706--; ISBN 0-7918-1771-7
- Country of Publication:
- United States
- Language:
- English
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