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centrifugal pumps

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Published: 01 December 2019
Fig. 1 ( a ) Fractured centrifugal pump axis. ( b ) Fracture surface: macroscopic overview. Fracture origin indicated More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001689
EISBN: 978-1-62708-233-4
... Abstract The drive shaft on a centrifugal pump fractured after five months of operation. The fracture occurred at a packing gland inside a sleeve against which the packing material sealed. The shaft and sleeve were of duplex stainless steel. In contrast to a previous conclusion that heating had...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003569
EISBN: 978-1-62708-180-1
... Abstract This article considers two mechanisms of cavitation failure: those for ductile materials and those for brittle materials. It examines the different stages of cavitation erosion. The article explains various cavitation failures including cavitation in bearings, centrifugal pumps...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001478
EISBN: 978-1-62708-220-4
... Abstract The broken end of a shaft from a centrifugal pump had a smooth fracture surface characteristic of failure from fatigue. Failure occurred in the plane of the keyway end and followed a slightly helical path, indicating that combined bending and torsional stresses were responsible...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001819
EISBN: 978-1-62708-241-9
.... 9 Fracture surface (cleavage). Arrows: holes with inclusion particles Fig. 10 Same aspect as in Fig. 9 with more detail Fig. 11 EDS spectrum: particles Fig. 12 EDS spectrum: matrix Fig. 1 ( a ) Fractured centrifugal pump axis. ( b ) Fracture surface...
Image
Published: 30 August 2021
Fig. 16 (a) Image of Monel shaft fracture location (left). The relatively rough fracture was through a threaded region with an abrupt change in section thickness. (b) Oblique view of the relatively rough fracture surface of the centrifugal pump shaft. (c) All regions of the fracture surface 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
... ( 2001 ) 8. Sastri V.S. , Ghali E. , Elboujdaini M. : Corrosion Prevention and Protection Practical Solutions ., p. 393 . Wiley , New York ( 2007 ) 10.1002/9780470024546 9. Sulzer Pumps Ltd: Centrifugal Pump Handbook , 3rd edn. Elsevier Ltd. , Houston ( 2010 ) 10...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001482
EISBN: 978-1-62708-229-7
.... Subsequently, it was ascertained that trouble had been experienced with the centrifugal feed pumps, resulting in scuffing of some bronze rings. The presumption is that bronze particles had been carried in mechanical suspension in the feed water and deposited in the economizer tubes. Boiler tubes Copper...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001399
EISBN: 978-1-62708-220-4
... Abstract An air compressor was installed at a chemical plant in which nitric acid was produced by burning ammonia with air. It was a 5000 hp, 5-stage centrifugal machine running at 6000 rpm, compressing air to 5 atm. Failure of the first stage impeller occurred due to a segment from the back...
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
... for microstructural and microhardness studies were taken some distance from the failed region. Visual Examination of General Physical Features Examination of the centrifugal pump revealed extensive rusting of the inside portion of the casing. Stagnant water was also found in the casing. Only the drive-end...
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
... Description of the Incident Summary Pump Support Seismic Restraints Pump Internal Design Pump Operating Parameters during the Incident Restart and Operation of the Pumps after the Incident Chemical Analysis Mechanical Properties Cause of Journal Failure Shrink Fit and Centrifugal...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003570
EISBN: 978-1-62708-180-1
... worldwide. Materials selection for hydraulic machines, especially massive ones, is dictated, in large part, by economics and fabricability. Thus, most large hydroturbines and many large centrifugal pumps are constructed of carbon-manganese steels, typically 0.2% C and 1% Mn. The most common...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001470
EISBN: 978-1-62708-220-4
... of fatigue cracks. Failure of the one impeller and the cracking of the others were attributed to “low-cycle high-strain fatigue” due to fluctuating circumferential (hoop) stresses. Centrifgual pumps Impellers Stresses 2.5Ni-Cr-Mo Fatigue fracture One impeller of a two-stage centrifugal air...
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 Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006810
EISBN: 978-1-62708-329-4
... stresses, with engine crankshafts and pump shafts as typical examples. Apart from wear by bearings, which can be a major contributor to shaft failure (see the section “Wear” in this article), the most common cause of shaft failure is metal fatigue. Fatigue is a weakest-link phenomenon; hence, failures...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003567
EISBN: 978-1-62708-180-1
.... and Schmidt F.E. Jr. , Ed., ASTM , 1987 , p 185 – 210 38. Roco M.C. , “Wear Patterns in Centrifugal Slurry Pumps,” Paper 244, Corrosion 88 (Houston), National Association of Corrosion Engineers , 1988 39. Roco M.C. , Optimum Wearing High Efficiency Design of Phosphate...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001084
EISBN: 978-1-62708-214-3
... Abstract Failure analysis was performed on a fractured impeller from a boiler feed pump of a fossil fuel power plant. The impeller was a 12% Cr martensitic stainless steel casting. The failure occurred near the outside diameter of the shroud in the vicinity of a section change at the shroud...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
... Abstract This article focuses on the general root causes of failure attributed to the casting process, casting material, and design with examples. The casting processes discussed include gravity die casting, pressure die casting, semisolid casting, squeeze casting, and centrifugal casting. Cast...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006789
EISBN: 978-1-62708-295-2
... machines; tillage tools; machine parts subjected to grinding operations; conveyors of mineral particles; sliding systems with hard particles in between Solid particle/droplet erosion Slurry pipelines; centrifugal pumps for slurry; turbine blades; nozzles for sand blasters Cavitation erosion Turbine...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006831
EISBN: 978-1-62708-329-4