Gasket performance of SWG in ROTT and short term estimation at elevated temperature
- Nippon Valqua Industries, Ltd., Yao, Osaka (Japan)
This paper deals with the sealability at room temperature and the durability at elevated temperature of SWG (spiral wound gasket). The fillers in the gasket specimens are chosen as newly developed non-asbestos, asbestos and flexible graphite. The effects of inner and outer rings inserted in the gasket specimens on the new PVRC gaskets constants are examined by using the ROTT test procedure (room temperature tightness test). The durability of SWG at elevated temperature is estimated by using the weight loss of filler and the stress-deflection curve of SWG obtained after aging at elevated temperatures. As a result, the sealability and the durability of newly developed non-asbestos SWG is the same as asbestos SWG, and the durability of flexible graphite SWG at elevated temperatures in this method conform to the boundary temperature in field and it is shown that this method is available to estimate the durability of gaskets at elevated temperatures.
- OSTI ID:
- 404146
- Report Number(s):
- CONF-960706--; ISBN 0-7918-1773-3
- Country of Publication:
- United States
- Language:
- English
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