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Reheating

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Published: 01 June 2019
Fig. 1 Reheating-furnace chain link, sand cast from austenitic manganese steel, that failed by brittle fracture, because material was not stable at operating temperatures. (a) Chain link showing location of fracture. Dimensions given in inches. (b) Macrograph of a nital-etched specimen from More
Image
Published: 01 January 2002
Fig. 54 Reheating-furnace chain link, sand cast from austenitic manganese steel, that failed by brittle fracture, because material was not stable at operating temperatures. (a) Chain link showing location of fracture. Dimensions given in inches. (b) Macrograph of a nital-etched specimen from More
Image
Published: 30 August 2021
Fig. 30 Reheating-furnace chain link, sand cast from austenitic manganese steel, that failed by brittle fracture, because material was not stable at operating temperatures. (a) Chain link showing location of fracture. Dimensions given in inches. (b) Macrograph of a nital-etched specimen from More
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001374
EISBN: 978-1-62708-215-0
... Abstract Two hot water reheat coil valves from a heating/ventilating/air-conditioning system failed in service. The values, a 353 copper alloy 19 mm (3/4 in.) valve and a 360 copper alloy 13 mm (1/2 in.) valve, had been failing at an increasing rate. The failures were confined to the stems...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048801
EISBN: 978-1-62708-229-7
... Abstract A 75 cm OD x 33 mm thick pipe in a horizontal section of a hot steam reheat line ruptured after 15 years in service. The failed section was manufactured from rolled plate of material specification SA387, grade C. The longitudinal seam weld was a double butt-weld that was V-welded from...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048299
EISBN: 978-1-62708-229-7
... Abstract Pendant-style reheater, constructed of ASME SA-213, grade T-11, steel ruptured. A set of four tubes, specified to be 64 mm OD x 3.4 mm minimum wall thickness was examined. A small quantity of loose debris was removed from the inside of one of the tubes. The major constituent...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001345
EISBN: 978-1-62708-215-0
... Abstract A cold-formed Grade TP 304 stainless steel swaged region of a reheater tube in service for about 8000 hours cracked because of sulfur-induced stress-corrosion cracking (SCC). Cracking initiated from the external surface and a high sulfur content was detected in the outer diameter...
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Published: 01 June 2019
Fig. 1(a) Fracture surface of reheat steam pipe showing corrosion products covering early-fracture region and freshly exposed fracture surface of weld metal. More
Image
Published: 01 June 2019
Fig. 1 Ruptured tubes from a pendant-style reheater. (a) As-received sections from the toe of the reheater. (b) Creep-type failure typical of all the failed tubes. See also Fig. 2 . More
Image
Published: 01 June 2019
Fig. 2 Microstructures of the failed reheater tube in Fig. 1(b) . (a) Section through the failure lip showing a complete spheroidization of the carbide phase in ferrite. (b) Section in the same plane as the failure, but 180° around the circumference of the tube. Structure is nearly normal More
Image
Published: 01 December 2019
Fig. 1 Service-exposed Reheater tube ( a ) appearance of failure tubes, with deposit on fire-side and inner oxide scale peeling off, ( b ) pits on outside surface, and ( c ) Cross section micrograph of the inner oxide scale detected by SEM More
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Published: 30 August 2021
Fig. 13 Photograph of reheater tube showing fishmouth opening with thin-lip rupture along with extensive bulging at failure location More
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Published: 30 August 2021
Fig. 14 Microstructure of failed reheater tube. (a) At away location showing equiaxed grains of ferrite with partially degraded pearlite/bainite. (b) At rupture showing degraded bainite along the grain boundaries of elongated ferrite and within the grains. Original magnification: 400× More
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Published: 01 December 1993
Fig. 1 The reheater tube sample as received for analysis. The bottom photograph shows a close-up of a circumferential crack. More
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Published: 30 August 2021
Fig. 56 Failure of a reheat steam piping line at a power-generating station. (a) Fracture surface of reheat steam pipe showing corrosion products covering early fracture region and freshly exposed fracture surface of weld metal. (b) Closeup of weld metal showing intergranular cracks More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001658
EISBN: 978-1-62708-229-7
... Abstract The intermediate pressure (IP) turbine of a thermal generating station is driven by steam from the boiler's reheater. On one particular IP turbine, a thick deposit was found on the insides of the rotor blade shrouds in two instances two years apart. The source of the deposits...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048331
EISBN: 978-1-62708-229-7
... Abstract The top tube of a horizontal superheater bank in the reheat furnace of a steam generator ruptured after seven years in service. The rupture was found to have occurred in the ferritic steel tubing (2.25Cr-1Mo steel (ASME SA-213, grade T-22)) near the joint where it was welded...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0089676
EISBN: 978-1-62708-224-2
... Abstract Chain link, a part of a mechanism for transferring hot or cold steel blooms into and out of a reheating furnace, broke after approximately four months of service. The link was cast from 2% Cr austenitic manganese steel and was subjected to repeated heating to temperatures of 455 to 595...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001520
EISBN: 978-1-62708-235-8
... for a reheat treatment. For parts that cracked after pressure testing, excessive dimensional changes precluded the inclusion of a reheat treatment as a manufacturing step, and further failure was averted by carefully employing proper machining practices, avoiding abusive machining. Chromium plating...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0046252
EISBN: 978-1-62708-229-7
... does not result in surface oxidation and crevices) Although type 347 stainless steel would be better, and Inconel 600 would be an even better choice. Welds would also need modified processing for reheating and annealing. Prevention of oil leakage into the system would minimize carburization...