Materials tests at the PRENFLO coal gasification plant
- Gesellschaft fuer Kohle-Technologie mbH, Essen (Germany, F.R.)
- Electric Power Research Inst., Palo Alto, CA (USA)
This report evaluates the behavior of tube materials tested in the PRENFLO coal gasification plant. The tests were conducted in the PRENFLO demonstration plant at Fuerstenhausen, Federal Republic of Germany. Some of the alloys were supplied by EPRI and some by GKT. The alloys were tested for more than 2000 operating hours as steam superheater tubes and isothermally in the form of prestressed tensile bars and U-bends. Thickness loss measurements and microscopic evaluation of the superheater tubes indicate that the low alloy ferritic steels (< 9 % Cr) are only suitable for use at temperatures below 400 {degree}C (752 {degree}F), if provisions are made to replace or repair the heat exchanger tubes every 2--5 years. Sanicro 28 and coextruded SS 310/T 11 tubes promise long-term service in evaporator elements with steam pressures up to 138 bar (2000 psi). Isothermal exposure of austenitic prestressed tensile bars and U-bend coupons did not reveal any stress corrosion cracking or other signs of downtime corrosion. 66 figs., 20 tabs.
- Research Organization:
- Electric Power Research Inst., Palo Alto, CA (USA); Gesellschaft fuer Kohle-Technologie mbH, Essen (Germany, F.R.)
- Sponsoring Organization:
- EPRI
- OSTI ID:
- 6969603
- Report Number(s):
- EPRI-GS-6826
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
COAL GASIFICATION PLANTS
HEAT EXCHANGERS
INCOLOY 800
CORROSION
STAINLESS STEEL-304
STAINLESS STEEL-310
CHEMICAL COMPOSITION
COATINGS
CRACKS
MECHANICAL PROPERTIES
SULFIDATION
TUBES
ALLOY-FE46NI33CR21
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
AUSTENITIC STEELS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
INCOLOY ALLOYS
INDUSTRIAL PLANTS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
NICKEL ALLOYS
STAINLESS STEELS
STEEL-CR19NI10
STEEL-CR25NI20
STEELS
TITANIUM ADDITIONS
TITANIUM ALLOYS
200104* - Fossil-Fueled Power Plants- Components
360105 - Metals & Alloys- Corrosion & Erosion
360103 - Metals & Alloys- Mechanical Properties