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fitness-for-service assessment

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930163
EISBN: 978-1-62708-359-1
... 1980s, a number of fracture mechanics-based assessment procedures have been developed that enable the significance of weld discontinuities to be assessed on a “fitness-for-service” basis. Using this concept, a structure is considered to be fit for service if it can be operated safely throughout its...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030360
EISBN: 978-1-62708-282-2
... to ensure their continued integrity and fitness for future service. To this end, it is important that a review is carried out on all plant items to assess those that pose the greatest risk. This process of risk assessment will identify the hazards associated with each item, the likelihood of failure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930113
EISBN: 978-1-62708-359-1
... is that the data from these tests can be used directly in fracture mechanics fitness-for-service procedures to assess the tolerance of the structure to the presence of defects and cracks. The parameters that affect the toughness of a material include: Material grade and chemistry Strength and hardness...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610001
EISBN: 978-1-62708-303-4
... of components is shown in Fig. 4 . Fig. 4 Flow diagram showing the relationship between the design phase and the investigative tasks for in-service failure, structural aging, and fitness-for-service of structural components. Source: Ref 1 One alternative for avoiding failures used in the past...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780093
EISBN: 978-1-62708-268-6
..., the failure analysis team knows that the parts are either defective or underdesigned. These assessments are governed by the distributions of in-service loads and component strengths, a topic covered in more detail elsewhere in this book. The testing described earlier can be supported by stress analysis...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490265
EISBN: 978-1-62708-340-9
... (700 to 800 °F). Estimation of FATT (or K Ic ) in the service-exposed condition at the location of concern is therefore critical for damage assessment. Currently available methods for doing this are discussed in a separate section on remaining-life-assessment methods. Fig. 6.9. Effect of temper...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490415
EISBN: 978-1-62708-340-9
... significantly during the next decade. In the meantime, there is an urgent need for techniques for assessing the conditions of components in turbines currently in service. Combustion turbines constitute approximately 7% of the total power-generation capacity of the U.S. electric utility industry. There has been...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490183
EISBN: 978-1-62708-340-9
... Abstract This chapter covers the failure modes and mechanisms associated with boiler components and the tools and techniques used to assess damages and predict remaining component life. It begins with a review of the design and operation of a utility boiler and the materials used...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.9781627083409
EISBN: 978-1-62708-340-9
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270031
EISBN: 978-1-62708-301-0
... becomes necessary for evaluating the fitness of the plant for continued service and life prediction. In these cases, the effects of in-service degradation such as graphitization, temper embrittlement, radiation embrittlement, cracking, and so forth have to be assessed by a variety of tests. Various...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930057
EISBN: 978-1-62708-359-1
.... A discontinuity constituting a danger to the fitness-for-service of a weld is a defect. By definition, a defect is a condition that must be removed or corrected ( Ref 1 ). The word “defect” should therefore be carefully used, because it implies that a weld is defective and requires corrective measures...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410009
EISBN: 978-1-62708-280-8
..., such as: A geometry that assures component fitness for functionality A configuration that assures manufacturability and target quality with the least cost, and A product that can be brought to market in the least amount of time Fig. 2.1 Expertise and goals of product designers and casting engineers...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270005
EISBN: 978-1-62708-301-0
... Abstract This chapter identifies the primary causes of service failures and discusses the types of defects from which they stem. It presents more than a dozen examples of failures attributed to such causes as design defects, material defects, and manufacturing or processing defects as well...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460227
EISBN: 978-1-62708-285-3
... in the repair process are to precoat the surface, apply a primer, and then apply the top coat. A repaired panel is shown in Fig. 9.11 . This repair demonstrated the ability of HPCS to restore the panel to full form, fit, and function. The repaired panel has been in service since August 2012. The repair process...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780359
EISBN: 978-1-62708-281-5
... or aging can be evaluated via DMA. Such changes can significantly alter the ability of the plastic material to withstand service stresses. While the cause and type of degradation cannot be determined, DMA can assess the magnitude of the changes. This can provide insight into potential failure causes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310281
EISBN: 978-1-62708-286-0
... for these calculations contains data for 20 elements and 85 phases. Although the databases are based primarily on the critical assessments of binary, ternary, and some quaternary systems, the CALPHAD methodology provides a theoretical framework on which extrapolations can be made to predict the phase equilibria...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240243
EISBN: 978-1-62708-251-8
...% of all mechanical service failures. Fatigue is a problem that can affect any part or component that moves. Automobiles on roads, aircraft wings and fuselages, ships at sea, nuclear reactors, jet engines, and land-based turbines are all subject to fatigue failures. Fatigue was initially recognized...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090367
EISBN: 978-1-62708-266-2
... and can result in major in-service catastrophes, as when an airplane wing-attachment fitting fractures. Parts can even fail before they ever see service, as when a shiny new machined hydraulic cylinder with a large crack is discovered by an aircraft assembly line worker. Figure 17.1 suggests...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320049
EISBN: 978-1-62708-332-4
... that are performed on prototypes and examples of product testing. The chapter describes the requirements of a traceability system. castings design process fatigue functional performance product design development traceability system DEVELOPMENT OF A PRODUCT that is fit for functional performance...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610549
EISBN: 978-1-62708-303-4
... of fractures and to the paths of cracks. The significance of any indications of abnormal conditions or abuse in service should be observed and assessed, and a general assessment of the basic design and workmanship of the part should also be made. Each important feature, including dimensions, should be recorded...