Fitness for Service Assessment
Assessing Degraded Equipment for Continued Service.
Through in-service degradation, or as a result of deficiencies in original manufacture, equipment is identified as being at risk of failure through cracking or overload. The most economic Run/Repair/Replace decisions can be made only if a full understanding of the residual strength and life the equipment is available.
Bureau Veritas provides analysis services to determine the remaining integrity and life of degraded or defective equipment. This comprises analysis of the equipment to determine the remaining strength capacity, based on detailed stress analysis and defect tolerance assessment.
Then, combined with data on the rate of ongoing degradation, the remaining safe life can be identified. Detailed calculation of stresses may be undertaken using in-house Finite Element Analysis (FEA) capability and may be supplemented with in-situ stress measurement using strain gauge techniques. Where components are cracked, computer based defect tolerance assessment will indicate whether the equipment is at risk of sudden failure.
In addition, with knowledge of the stress fields in the crack region, it is possible to predict the rate of fatigue crack growth to indicate remaining service life. Statistical methods may be applied in cases where distributions of damage (for example, thinning or pitting) to identify extreme values of damage from a sample of data and to characterise trends in the degradation.
Why Choose Bureau Veritas
- We have extensive local expertise in the Australian petrochemical, minerals, mining and power generation industries, with a workforce of over 1000 personnel nationally.
- Our engineering teams have high levels of technical competence with all aspects of the integrity management chain, so that we are able to provide complete integrity solutions.
- The international network of Bureau Veritas Technical Centres share knowledge and experience to ensure that the right specialist advice is always available.
FAQ - Frequently Asked Questions
What is the recognised method of assessment of cracked equipment to determine whether it is safe for continued operation?
- A number of standards (Australian, US, British) now allow continued operation of equipment containing cracks on the condition that an appropriate fitness for service assessment is conducted by a competent body.
- Technical Software has been developed in accordance with the more quantitative standards for FFS assessment to reliably calculate defect tolerance and failure mode, which allows competent engineers to determine compliance with the standards and provide auditable documentation of the analysis.