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TAPPI TIP 0402-38

2015 Edition, January 1, 2015

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Best practice guidelines for detecting and mitigating waterside cracking (stress-assisted corrosion) in power and recovery boilers

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Description / Abstract:

This TIP describes the SAC damage mechanism and its controlling parameters, based on comprehensive research studies by the power utility industry in Europe and N. America; boiler components likely to experience SAC; inspection and testing methods; fitness-for-service assessment, and general guidelines for mitigating SAC.

SAC is most effectively found and managed with an owner-accountable testing and inspection program with formal analytical and testing practices and procedures, done by mill personnel and non-destructive testing technicians qualified to find SAC and monitor its progress over time.