Application of co-extruded and coated tubes to advanced steam cycle boilers

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6888338

Ito, F; Kuwabara, K; Ishimoto, R; Haneda, H; Tamura, K

Design steam conditions for currently planned Advanced Steam Cycle power plants are 4500 psi (31MPa), 1100/sup 0/F (593/sup 0/C) and 5000 psi (34.5MPa), 1200/sup 0/F (650/sup 0/F), requiring tube materials of high creep strength and excellent resistance to coal ash corrosion. Certain existing high chromium and high nickel alloys are usable, but are quite expensive and have relatively poor thermal conductivity. Composite tubes consisting of a high strength alloy inner core clad with a thin layer of corrosion resisting alloy can provide an economical alternative. Such tubes can be made by co-extrusion or by diffusion coating. A study of the application of composite tubes is presented. Inner tube materials selected were 17-14CuMo, Fine Grained TP347H, Tempaloy A-1, Alloy 800H, and conventional TP347H. 310SS and 35Cr-45Ni steel were chosen as the outer, corrosion-resistant layers.

• OSTI ID: 6888338
• Report Number(s): CONF-861005-
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200101* -- Fossil-Fueled Power Plants-- Cooling & Heat Transfer Equipment & Systems
36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360103 -- Metals & Alloys-- Mechanical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
AEROSOL WASTES
ALLOYS
ASHES
BENDING
BOILERS
CARBONACEOUS MATERIALS
CHROMIUM ALLOYS
CHROMIUM BASE ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
COAL
COEXTRUSION
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
CREEP
DESIGN
ENERGY SOURCES
EXTRUSION
FABRICATION
FLUID MECHANICS
FLY ASH
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
HEAT EXCHANGERS
HIGH TEMPERATURE
HYDRAULICS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
MATERIALS
MATERIALS WORKING
MECHANICAL PROPERTIES
MECHANICS
MEDIUM PRESSURE
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
POWER PLANTS
RESIDUES
STAINLESS STEELS
STEAM GENERATORS
STEELS
THERMAL POWER PLANTS
TUBES
VAPOR GENERATORS
WASTES
WELDING