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Reliability of machines and typical failure rates

Reliability of machines and typical failure rates

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This chapter has shown that by addressing failure modes that are slow to mature, CM could significantly affect the detection of faults before they occur. CM can then form part of planning fixed-time interval maintenance (ii) and will be at the heart of maintenance for method (iii). Prior to determining the type of equipment and frequency of monitoring, some consideration should also be given to whether the cost of implementing such a program is justified. Factors involved in this decision may include: Replacement or repair cost of the equipment to be monitored; Criticality of the plant to safe and reliable operation; Long term future of the facility in which the equipment is installed.

Chapter Contents:

  • 4.1 Introduction and business of failure
  • 4.2 Definition of terms
  • 4.3 Root cause and FMEA
  • 4.3.1 General
  • 4.3.2 Typical root causes and failure modes
  • 4.3.3 Root causes
  • 4.3.4 Failure modes
  • 4.4 Reliability analysis
  • 4.5 Machine structure
  • 4.6 Typical failure rates and MTBFs
  • 4.7 Conclusions

Inspec keywords: planning; electric machines; condition monitoring; failure (mechanical); maintenance engineering

Other keywords: fixed-time interval maintenance planning; failure modes; typical failure rates; repair cost; replacement cost; machines reliability

Subjects: Maintenance and reliability; Plant engineering, maintenance and safety; Planning; a.c. machines; d.c. machines

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