SN EN 12952-4 : 2011

Foreword
1 Scope
2 Normative references
3 Definitions
4 Symbols and abbreviations
5 General
6 Calculations
Annex A (informative) Calculation of in-service creep
                      damage
      A.1 - General
      A.2 - Symbols and abbreviations
      A.3 - Calculation of in-service lifetime and creep
            damage
Annex B (informative) Calculation of in-service fatigue
                      damage
      B.1 - General
      B.2 - Symbols and abbreviations
      B.3 - Calculation of stress due to fatigue
      B.4 - Detection of extreme values of stress
      B.5 - Detection of load cycles
      B.6 - Remaining sequence of relative extreme (RSE)
      B.7 - Limitation of the number of the remaining
            extremes
      B.8 - Classification of load cycles
      B.9 - Calculation of fatigue damage
      B.10 - Accuracy and plausibility of the measured
             values
Bibliography

Applicable to water-tube boilers as defined in prEN 12952-1(1997). Describes methods to calculate creep and/or fatigue damage of boiler components during operation. The manufacturer is not required to carry out these calculations as part of their responsibilities in this standard.