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Companion Guide to the ASME Boiler & Pressure Vessel Code, Volume 1, Second Edition
K. R. Rao
K. R. Rao
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ASME Press
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In Chapter 4, Roger Reedy provides commentary for the understanding and application of the principles of the ASME B&PV Code. Roger traces the history of the Code, from its initial charter and the voluntary effort of engineers for establishing a Code with a safety record to the current Code developed by a consensus process. Roger suggests that Code Users apply common sense when using the Code and for understanding Code requirements. He emphasizes that “the Code is not a handbook and cannot substitute for the use of engineering judgment.” Also, Roger emphasizes the need for a better understanding of the basic principles of the Code Interpretations in the application of safety factors for the Section III Nuclear Code, the Section VIII Pressure Vessels, and the Section I Boiler Code. Roger states that the term safety factor is both incorrect and misleading, because a reduction in the factor seems to indicate a reduction in safety. In fact, when the Code Committee considers a reduction in design factor, it allows the reduction only after it determines that other changes in Code requirements have compensated for the reduction.

4.1 Introduction
4.2 Design Factors Used in the ASME Code
4.3 Design Specifications and Design Reports
4.4 Section III Versus Section VIII
4.5 Design Life and Commutative-Usage Factors
4.6 Service-Level Loadings
4.7 Seismic Evaluations
4.8 Engineers, Design, and Computers
4.9 Containment Vessels
4.10 Tolerances, Significant Figures, and Nominal Dimensions
4.11 Corrosion and Erosion
4.12 Forming Operations
4.13 Post-weld Heat Treatment
4.14 Nondestructive Examination
4.15 Hydrostatic Test
4.16 Quality Assurance
4.17 Design Loadings and Stresses Compared to Actual Conditions
4.18 Post-Construction Postulated Loadings and Stresses
4.19 Maintenance of Design Margins
4.20 Thermal Relief Devices
4.21 Code Cases
4.22 ASME Interpretations
4.23 Code Simplification
4.24 Future Considerations for Cyclic Service
4.25 Summary
4.26 References
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