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Superheaters

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Published: 01 November 2007
Fig. 12.3 Refuse-derived fuel unit, with superheaters (right above the nose arch or bull nose) and a boiler (generating) bank in the convection pass. The bottom of the furnace is a traveling grate. Source: Ref 3 More
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Published: 01 November 2007
Fig. 12.29 Alloys 72 overlay superheater tube (a) and alloy C276 overlay superheater tube (b) after 7200 operating hours (10 months) in a RDF unit. The windward side of the tube, where the flue gas impinged upon the tube surface was the top side of the tube cross section as shown in the figure More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080335
EISBN: 978-1-62708-304-1
... and alloys. It also discusses corrosion protection methods for furnace waterwalls and superheater tubes in waste-to-energy boilers. corrosion corrosion protection superheaters waste incinerators waste-to-energy boilers 12.1 Introduction Municipal solid waste (MSW) is a combination...
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Published: 01 December 2018
Fig. 5.2 Grain size measurement on final superheater tube sample More
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Published: 01 December 2018
Fig. 5.5 Cross section of superheater tube sample that has undergone decarburization Location Decarb depth, μm 1 384.7 2 397.5 3 394.9 4 359.3 5 361.8 Avg 379.6 More
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Published: 01 December 2018
Fig. 5.6 Variation in scale thickness on flue gas side of a superheater tube Location Scale thickness, μm 1 583.5 2 575.8 3 524.9 4 675.2 5 537.6 Avg 579.4 More
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Published: 01 December 2018
Fig. 5.14 EDS spectrum for outer surface of a superheater tube sample More
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Published: 01 December 2018
Fig. 6.23 Failed superheater tube (a) showing 180° bending and (b) opposite end view showing a burst opening with disordered contours More
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Published: 01 December 2018
Fig. 6.36 Close-up views of a superheater tube at the failure location More
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Published: 01 December 2018
Fig. 6.131 Superheater tube cut by steam leaking from an adjacent tube More
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Published: 01 December 2018
Fig. 6.137 Portion of a failed superheater tube showing failure location More
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Published: 01 August 2005
Fig. 18 Type 321 stainless-steel (ASME SA-213, grade TP321H) superheater tube that failed by thick-lip stress rupture. (a) Overall view of rupture. (b) Macrograph of an unetched section from location at arrows showing extensive transverse cracking adjacent to the main fracture (at right More
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Published: 30 November 2013
Fig. 6 Thick-lip “fishmouth” failure of a 2-in.-diam superheater tube. The tube bent away from the fracture due to the reaction force of the escaping steam. The material was ASME SA-213 T22 (0.15 maximum C, 1.90–2.60 Cr, 0.87–1.13 Mo). Hardness was 96–98 HRB. Scale about 0.012 in. thick More
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Published: 01 August 2005
Fig. 1.31 Combined effects of superheat and heating rate on the spreading of 0.5 mg spheres of Ag-29Cu braze on nickel substrates in a nitrogen-10% hydrogen atmosphere. Area of isospread contours in mm 2 are shown. Adapted from Weirauch and Krafick [1996] More
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Published: 01 December 1989
Fig. 5.18. Sample life-consumption chart for superheater outlet header tees with four steam leads from a 350-MW, 16.5-MPa (2.4-ksi), 565/540 °C (1050/1000 °F) middle load unit ( Ref 26 ). More
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Published: 01 December 1989
Fig. 5.43. Preliminary issues and level I and level II assessments of superheater outlet headers ( Ref 76 ). More
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Published: 01 December 1989
Fig. 5.44. Level III assessment of superheater outlet headers ( Ref 76 ). More
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Published: 01 November 2007
Fig. 10.64 Effect of SO 2 content in flue gas on the corrosion of several superheater/reheater materials exposed to synthetic ash containing 5 wt% (Na 2 SO 4 + K 2 SO 4 ) at 650 °C (1200 °F). Source: Ref 70 More
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Published: 01 November 2007
Fig. 10.66 Typical wastage feature of a corroded superheater and reheater tube from a coal-fired boiler. Source: Ref 13 More
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Published: 01 November 2007
Fig. 10.72 Cross section of a superheater tube made of Type 304SS suffering coal-ash corrosion attack. Note the wastage flats on both sides of the tube surface where the flue gas impinged at the 90° location (i.e., facing the ruler in the photo). Courtesy of Welding Services Inc. More