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superheaters

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430409
EISBN: 978-1-62708-253-2
.... It describes life assessment methods based on hardness, wall thickness, scale formation, microstructure, and creep. It also includes a case study on the determination of the residual life of a secondary superheater tube. References References 8.1 Viswanathan R. , Paterson S.R. , Grunloh...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080259
EISBN: 978-1-62708-304-1
... of the reheater (538 °C, or 1000 °F steam) for 3½ years in a 255 MW(e) subcritical boiler, which burned high chlorine coal (about 0.3%), showing slight pitting attack. The 304H reheater tubes exhibited a typical 4 year life. Courtesy of Welding Services Inc. Fig. 10.90 Alloy 72 overlay superheater tubes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080335
EISBN: 978-1-62708-304-1
... (280) 3.63 (143) Type 310 7.77 (306) … Source: Ref 33 Wastage rates for the carbon steel tube and the alloy 625 overlay tube in a side-by-side test as part of a finishing superheater in a boiler in New York Table 12.7 Wastage rates for the carbon steel tube and the alloy 625...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080359
EISBN: 978-1-62708-304-1
... surface. Courtesy of Welding Services Inc. Fig. 13.19 Results of corrosion probe tests for T-22 in the lower superheater region for 840 h in a boiler. Source: Ref 46 Fig. 13.20 T-11 superheater tube sample showing severe corrosion attack after 6 months of operation. Source: Ref 31...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080321
EISBN: 978-1-62708-304-1
.../scales removed from the test specimens exposed in the superheater area at temperatures from 565 to 850 °C (1050 to 1560 °F) in a utility boiler Table 11.2 Analysis of deposits/scales removed from the test specimens exposed in the superheater area at temperatures from 565 to 850 °C (1050 to 1560 °F...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430325
EISBN: 978-1-62708-253-2
... with oxide, 400× Fig. 6.145 (a) Unetched micrograph indicating wedge-shaped fine hairline cracks emanating from the surface, 100×. (b) SEM image showing fatigue striations for corrosion fatigue failure, 1000× Fig. 6.137 Portion of a failed superheater tube showing failure location...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430314
EISBN: 978-1-62708-253-2
... Fig. 6.126 Erosion and longitudinal rupture of boiler tube due to misaligned soot blower Fig. 6.127 (a) Eroded surface of a screen tube near bend. (b) SEM image of area eroded due to furnace gases containing fly ash, 100× Fig. 6.131 Superheater tube cut by steam leaking...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430017
EISBN: 978-1-62708-253-2
... separators (primary separators), secondary separators, and screen dryers (final separators). The dry steam is then fed to the superheater coils in a superheater. Exhaust gases from the boiler are drawn by an induced-draft fan through an electrostatic precipitator and then vented off through the chimney...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430149
EISBN: 978-1-62708-253-2
... the grain boundaries, 5000× Fig. 6.36 Close-up views of a superheater tube at the failure location Fig. 6.39 Close-up view at the failure location. The rupture is in the form of a fish-mouth opening. A crack extends in the longitudinal direction from one end of the rupture. Fig...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430290
EISBN: 978-1-62708-253-2
...) wall thinning Fig. 6.118 Acid dew-point corrosion on external surface of an evaporator tube Fig. 6.121 Optical micrograph indicating fire-side intergranular stress corrosion cracking and grain dropping in superheater tube, 400× Fig. 6.122 Optical micrograph showing PASCC...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430351
EISBN: 978-1-62708-253-2
... Reheater Tubes Case Study 36—Failure Investigation of Economizer Coil Tube Case Study 37—Failure Investigation of Site Weld Joint of Superheater Economizer Coil Support Tube Case Study 38—Failure Investigation of Waterwall Tube Case Study 39—Failure Investigation of a Spiraled Waterwall Tube...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430343
EISBN: 978-1-62708-253-2
...-ups, excessive load swing, excessive heat inputs, poor water chemistry control, and water-treatment methods. Case Study 34—Characterization of the Scale Formed in Superheater Tubes and Investigation of Its Exfoliation Behavior Background Details Investigation and Findings Discussion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490183
EISBN: 978-1-62708-340-9
.... At the roof of the furnace, the gas flow is made horizontal across banks of secondary superheater and reheater tubes. The gases are then turned downward, where they encounter the primary superheater and the economizer. Before exiting through the stack, the combustion gases are fed through an air preheater...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490383
EISBN: 978-1-62708-340-9
... designs for superheaters, reheaters, turbine forgings, and casings needed. II 34.5 5000 650/595/595 1200/1100/1100 Significant research and development needed on austenitic rotor forgings and coal-ash-corrosion-resistant boiler tubing. Full-size test facilities needed. (a) Temperatures...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.9781627083041
EISBN: 978-1-62708-304-1
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430107
EISBN: 978-1-62708-253-2
... Electrons Wavelength 4000–7500 Å > 0.5 Å 0.02–0.04 Å Magnification 10–2000× 10–150,000× 10–300,000× Resolution 250 nm or 2500 Å 5 nm or 50 Å 0.01 nm or 0.1 Å Depth of field 0.08 μm at 1200× 10 μm at 10,000× … Elemental composition of outer surface of superheater tube...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430001
EISBN: 978-1-62708-253-2
... is controlled in order to avoid their carryover to the upper portions of the furnace where they may otherwise deposit on the tubes. Such carryover deposits are particularly found in the superheater section, and may consist of soot, ash, and slag. Deposits decrease the boiler efficiency by reducing heat transfer...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080003
EISBN: 978-1-62708-304-1
... with a corrosion-resistant alloy cladding on the outer diameter have long been available for construction of waterwalls as well as superheaters in boilers. Composite tubes manufactured by a spiral weld overlaying process have been made available in recent years. These composite tubes use the outer diameter...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.9781627082532
EISBN: 978-1-62708-253-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2004
DOI: 10.31399/asm.tb.ps.t62440103
EISBN: 978-1-62708-352-2
... available and the higher intrinsic nobility of the alloys. Fig. 3.5 (a-f) Spread tests of four common solders, melted on NiCr/Au substrates at 10 °C (18 °F) superheat, in controlled atmospheres. There is negligible benefit from a hydrogen-rich atmosphere. Although somewhat subjective, the solders...