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Published: 01 June 2019
Fig. 8 Unetched micro-section of a cracked pump casing of austenitic spheroidal graphite cast iron. 100 × More
Image
Published: 01 June 2019
Fig. 11 Micrograph from the section of the wall of the pump casing taken at a higher magnification. Etched in V2A etch. 500 × More
Image
Published: 01 December 1992
Fig. 1 Cross section of impeller in pump case. More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001779
EISBN: 978-1-62708-241-9
... the dominant failure mechanisms and that the materials and processes used to make the pumps were largely unsuited for the application. pump casing cavitation wear erosion steel shrinkage pits and voids scanning electron microscopy cavitation resistance C30 (low-carbon steel alloy) UNS G10300...
Image
Published: 01 June 2019
Fig. 10 Scanning electron micrograph of a fracture face from the cracked pump casing in Fig. 8 . 400 × More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001476
EISBN: 978-1-62708-229-7
... tubeplate on the opposite side. After a mishap, the paint had been burned off the upper half of the shell. Internally, most of the tubes were found to be twisted or bent. The casing of the pump used to circulate the cooling water was also found to be cracked after the mishap. All the evidence pointed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046414
EISBN: 978-1-62708-234-1
... pump casing. Investigation Visual examination of the impellers disclosed that the interior surfaces were extremely clean but were pockmarked over the entire area. The flange face on the suction side and the surfaces adjacent to those where material was missing showed evidence of cold work...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001809
EISBN: 978-1-62708-241-9
.... The replacement pump was slightly oversized, which had the potential to cause erosion or cavitation. The impeller was coated with a brushable ceramic, which was typical for seawater impellers, for additional corrosion resistance and mechanical strength. The pump is a split case, double suction, with equal suction...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001163
EISBN: 978-1-62708-234-1
... region of bolt in X10 CrNiTi 18 9 that failed by stress corrosion cracking. 8 × Fig. 8 Unetched micro-section of a cracked pump casing of austenitic spheroidal graphite cast iron. 100 × Fig. 9 Scanning electron micrograph of a fracture face from the bolt in Fig. 7 . 400 × Fig...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001087
EISBN: 978-1-62708-214-3
... Abstract The repeated failure of rubber-covered rotors and volute liners in a flue gas desulfurization system after conversion from lime slurry reagent to limestone slurry reagent was investigated. The pump was a horizontal 50 x 65 mm (2 x 2.5 in.) Galiger pump with a split cast iron case...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001828
EISBN: 978-1-62708-241-9
... loads. The pump discharge pipes themselves are provided with a horseshoe clamp with predetermined clearance for thermal expansion of the pump casing under operating temperature. Seismic Restraints Each HT pump motor is provided with three seismic pads on the motor frame and three lateral...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047793
EISBN: 978-1-62708-217-4
... Abstract Failure of a case hardened steel shaft incorporated fuel pump in a turbine-powered aircraft resulted in damage to the aircraft. The disassembled pump was found to be dry and free of any contamination. Damage was exhibited on the pressure side of each spline tooth in the impeller...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001370
EISBN: 978-1-62708-215-0
... included use of a case-hardened En 8 steel with the correct composition and regular maintenance of the pump. Cooling systems Nuclear reactors Shafts (power) Water cooling EN8 Fatigue fracture Corrosion fatigue Background After 7 years of operation, a service water pump in a nuclear...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001202
EISBN: 978-1-62708-234-1
... Abstract Two damaged impellers made of austenitic cast iron came from a rotary pump used for pumping brine mixed with drifting sand. On one of the impellers, pieces were broken out of the back wall in four places at the junction to the blades. The fracture edges followed the shape of the blade...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001578
EISBN: 978-1-62708-233-4
... Pumps Turbines Metal (Other, miscellaneous, or unspecified) failure (Other, general, or unspecified) fracture Cavitation wear Part I—Special Cases Case #1: Vibration in Hydroelectric Dam The entire structure of a hydroelectric dam would begin to vibrate whenever a hydroelectric turbine...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001189
EISBN: 978-1-62708-218-1
... or case hardening would have been better under these circumstances. Fuel injection pumps Gears Pitting (wear) C45 Rolling-contact wear Two fuel injection pump gears that were nitrided in a cyanide bath were submitted by the engine manufacturer for examination of hardness distribution...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001592
EISBN: 978-1-62708-228-0
... Abstract Sucker-rod pumps are operating in very aggressive environments in oil well production. The combined effect of a corrosive environment and significant mechanical loads contribute to frequent cases of failure of the rod string during operation. Standards and recommendations have been...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047453
EISBN: 978-1-62708-235-8
... Abstract The origins of the casting are unknown. It is included here as a classic case of intergranular corrosion. The part (apparently a pump outlet) was named the “rubber casting” because of the severity of the intergranular attack. Every grain boundary has been attacked to the extent...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001688
EISBN: 978-1-62708-234-1
... Abstract Some examples of equipment failures involving high temperature operation are presented. They include some steam generator superheater components and a pump shaft that should not have been at high temperature. Metallographic analysis is used to determine the causes of failure in each...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001082
EISBN: 978-1-62708-214-3
... plant. Fig. 1 Cross section of impeller in pump case. Circumstances Leading to Failure During the retirement planning phase of the 8-year-old original circulating water pump impellers made of nickel-aluminum-bronze, newly cast type 304L stainless steel pump impellers were installed...