Deposit-related failures of boiler superheater tubing and steam piping
Conference
·
OSTI ID:128639
- Betz Labs. Inc., The Woodlands, TX (United States)
Deposition in superheater tubing can originate from the carryover of water droplets into the superheater bank from the steam drum. Deposition occurs because the concentration of impurities present in the entrained water droplets can be several orders of magnitude greater than that present in steam alone. When the water flashes to steam in the superheater, salts, hardness species, and corrosion products dissolved or suspended in the water build-up on the internal surfaces of the superheater tubing. The detrimental effects of carryover deposition in superheater tubing has been shown to contribute to at least three types of failure: stress-corrosion cracking, overheating, and corrosion gouging. A case history illustrating each one of these failure mechanisms is presented.
- OSTI ID:
- 128639
- Report Number(s):
- CONF-950304--
- Country of Publication:
- United States
- Language:
- English
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