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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090881
EISBN: 978-1-62708-229-7
... Abstract A power plant using two steam generators (vertical U-tube and shell heat exchangers, approximately 21 m (68 ft) high with a steam drum diameter of 6 m (20 ft)) experienced a steam generator tube rupture. Each steam generator contained 11,012 Inconel alloy 600 (nickel-base alloy) tubes...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090277
EISBN: 978-1-62708-229-7
... Abstract A rupture of a thirty-year-old U-tube on a steam generator for a closed-cycle pressurized-water nuclear power plant occurred, resulting in limited release of reactor water. A typical tube bundle can be over 9 m (30 ft) tall and 3 m (10 ft) in diam with over 3,000 22-mm (7/8-in.) diam...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001240
EISBN: 978-1-62708-234-1
... Abstract A heat exchanger made of a pipe in which oil was heated from the outside from approximately 90 deg C to 170 deg C, by superheated steam of about 8 to 10 atmospheres had developed a leak at the rolled joint of the pipe and pipe bottom. The pipes were supposed to be made from St 35.29...
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Published: 01 June 2019
Fig. 1 Cross-section schematic drawing of a steam generator showing U-tube bundle More
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Published: 01 June 2019
Fig. 1 Cross section through leak in steam-generator wall. Crack extends across weld metal, base metal, and HAZ. Erosion obliterated much of the original crack detail. More
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Published: 01 June 2019
Fig. 2 Fracture morphology of steam-generator wall in a region where regularly spaced striations typical of fatigue are evident. More
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Published: 01 June 2019
Fig. 3 Fracture surface of a failed steam-generator sample. The fracture morphology is characteristic of fatigue cracking, but 1 ppm of Ce − under constant extension rate testing produced this same fracture morphology in laboratory tests. The initiation site is on the inside surface More
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Published: 01 June 2019
Fig. 1 Heat-recovery steam generator More
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Published: 01 June 2019
Fig. 1 Photographs of a ruptured Inconel 600 steam generator tube. (a) Tube rupture. (b) SEM fractograph showing the IG fracture surface. (c) Micrograph showing the IG attack that extended from the OD surface More
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Published: 01 January 2002
Fig. 10 Photographs of a ruptured Inconel 600 steam generator tube. (a) Tube rupture. (b) SEM fractograph showing the IG fracture surface. (c) Micrograph showing the IG attack that extended from the OD surface More
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Published: 01 January 2002
Fig. 9 Cross-section schematic drawing of a steam generator showing U-tube bundle More
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Published: 30 August 2021
Fig. 65 Cross section through leak in steam-generator wall. Crack extends across weld metal, base metal, and heat-affected zone. Erosion obliterated much of the original crack detail More
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Published: 30 August 2021
Fig. 66 Fracture morphology of steam-generator wall in a region where regularly spaced striations typical of fatigue are evident More
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Published: 30 August 2021
Fig. 67 Fracture surface of a failed steam-generator sample. The fracture morphology is characteristic of fatigue cracking, but 1 ppm of Ce − under constant extension-rate testing produced this same fracture morphology in laboratory tests. The initiation site is on the inside surface More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001051
EISBN: 978-1-62708-214-3
... Abstract A pair of steam generators operating at a pressurized water reactor site were found to be leaking near a closure weld. The generators were the vertical U-tube type, constructed from ASTM A302 grade B steel. The shell material exhibited high hardness values prior to confirmatory heat...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048814
EISBN: 978-1-62708-229-7
... Abstract A nuclear steam-generator vessel constructed of 100-mm thick SA302, grade B, steel was found to have a small leak. The leak originated in the circumferential closure weld joining the transition cone to the upper shell. The welds had been fabricated from the outside by the submerged arc...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001609
EISBN: 978-1-62708-229-7
... Abstract Alloy 430 stainless steel tube-to-header welds failed in a heat recovery steam generator (HRSG) within one year of commissioning. The HRSG was in a combined cycle, gas-fired, combustion turbine electric power plant. Alloy 430, a 17% Cr ferritic stainless steel, was selected because...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001011
EISBN: 978-1-62708-229-7
... Abstract After some 87,000 h of operation, failure took place in the bend of a steam pipe connecting a coil of the third superheater of a steam generator to the outlet steam collector. The unit operated at 538 deg C and 135 kPa, producing 400 t/h of steam. The 2.25Cr-1Mo steel pipe in which...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006777
EISBN: 978-1-62708-295-2
... a case history on IG fracture of steam generator tubes, where a lowering of the operating temperature was proposed to reduce failures. dimpled intergranular fracture grain boundaries hydrogen embrittlement intergranular brittle cracking intergranular fatigue intergranular stress-corrosion...
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...