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boiler tubes

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430087
EISBN: 978-1-62708-253-2
... efficiency, as well as greater demand on construction materials. This chapter discusses the primary requirements for boiler tube materials, including oxidation and corrosion resistance, fatigue strength, thermal conductivity, and the ability to resist creep and rupture. It also provides information...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430107
EISBN: 978-1-62708-253-2
... Abstract This chapter describes some of the most effective tools for investigating boiler tube failures, including scanning electron microscopy, optical emission spectroscopy, atomic absorption spectroscopy, x-ray fluorescence spectroscopy, x-ray diffraction, and x-ray photoelectron...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430409
EISBN: 978-1-62708-253-2
... Abstract The power generating industry has become proficient at predicting how long a component will last under a given set of operating conditions. This chapter explains how such predictions are made in the case of boiler tubes. It identifies critical damage mechanisms, progressive failure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.9781627082532
EISBN: 978-1-62708-253-2
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Published: 01 December 2018
Fig. 4.2 Creep strength of different materials used as boiler tubes and related applications More
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Published: 01 December 1989
Fig. 5.3. Creep-rupture failures in boiler tubes ( Ref 1 ). (a) Typical short-term overheating failure. (b) Typical long-term creep failure. More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430027
EISBN: 978-1-62708-253-2
... of diffusion, nucleation, and growth. It also discusses alloying, heat treating, and defect formation and briefly covers condenser tube materials. alloying elements austenitic stainless steels boiler tubes condenser tubes continuous cooling transformation diagram creep-resistant steels ferritic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430379
EISBN: 978-1-62708-253-2
... Abstract Water chemistry is a factor in nearly all boiler tube failures. It contributes to the formation of scale, biofilms, and sludge, determines deposition rates, and drives the corrosion process. This chapter explains how water chemistry is managed in boilers and describes the effect...
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Published: 30 November 2013
Fig. 7 Thin-lip rupture in a boiler tube caused by rapid overheating. This rupture exhibits a “cobra” appearance as a result of lateral bending under the reaction force imposed by escaping steam. The tube was a 2-½ in. outside diameter, 0.250 in. wall boiler tube made of 1.25Cr-0.5Mo steel More
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Published: 01 December 2018
Fig. 5.4 Oxide and sulfide inclusions in a boiler tube sample More
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Published: 01 December 2018
Fig. 6.1 (a) Thick-lip rupture in a boiler tube due to long-term overheating. (b) Thin-lip rupture in a boiler due to short-term overheating More
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Published: 01 December 2018
Fig. 6.2 Carbon steel boiler tube sample subjected to prolonged overheating below Ac 1 showing voids (black) along the grain boundaries and spheroidization of carbides, (a) optical micrograph, 200×; and (b) SEM image, 3500× More
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Published: 01 December 2018
Fig. 6.16 Typical microstructures of low-carbon steel boiler tube samples showing (a) elongated grains near tensile rupture resulting from rapid overheating below the recrystallization temperature, 200×; and (b) mixed structure near rupture resulting from rapid overheating between Ac 1 and Ac More
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Published: 01 December 2018
Fig. 6.85 Cavitation damage in a boiler tube More
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Published: 01 December 2018
Fig. 6.105 Boiler tube showing cracking due to caustic embrittlement More
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Published: 01 December 2018
Fig. 6.126 Erosion and longitudinal rupture of boiler tube due to misaligned soot blower More
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Published: 01 January 2000
Fig. 63 Failure of boiler tube wall due to corrosion fatigue cracking. (a) Wedge-shaped corrosion fatigue crack filled with corrosion product. As the cyclic process continues, this crack will eventually propagate through the tube wall. (b) A family of longitudinal corrosion fatigue cracks More
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Published: 01 July 2000
Fig. 7.32 (a) Pitting corrosion of inner wall of boiler tube due to insufficient deaeration of feedwater. Corrosion products brush removed from right side of section. (b) Cross section of pipe wall showing distribution of pits More
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Published: 01 March 2002
Fig. 1.6 Micrograph of ASME SA213-T22 boiler tube steel showing a microstructure consisting of ferrite (light etching constituent) and a small amount of pearlite (dark etching constituent). Light tan areas are martensite. Etched in 4% picral. 200× More
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Published: 01 October 2011
Fig. 16.21 Axial cracks in a failed boiler tube from a nuclear power plant. The cracks were detected by nondestructive eddy current inspection. (a) and (b) show the same fracture surface as (a) a SEM backscatter electron image and (b) an optical microscope image. Courtesy of Marcus Brown, NDE More