NACE RP 05 90 : 0

1 General
2 Failure Analysis
3 Inspection methods
4 Repair, Design, and Fabrication
5 Operation and Water Chemistry
References
Bibliography
Appendix A: Standardized Nomenclature
Appendix B: Standardized Failure Analysis Format for Deaerator
            Heaters and Storage Vessels
Appendix C: Deaerator Failure Analysis
Appendix D: Photographic Representations of Various Types of
            Cracks
Appendix E: Illustration of Metallographic Cross-Sections at
            Right Angle to the Longitudinal and Transverse Cracks

Summarizes the work of five investigative NACE work groups formed to study nondestructive testing methods, unit operation and water chemistry, unit fabrication and repair, failure analysis, and failure mechanism and corrosion data. Addresses procedures for inspection of deaerator heater and water storage vessel welds, including reinspection criteria and qualification of personal; factors influencing boiler feedwater deaerator cracking based on literature references and case history analysis; standardized nomenclature of deaerator vessel welds and cracking; guidelines for materials, design, fabrication, inspection and acceptance criteria for new deaerator vessels, and for repair of existing deaerator vessels; and operational and water chemistry parameters that may influence deaerator deterioration.