API TR 6AF1 : 1998
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
TECHNICAL REPORT ON TEMPERATURE DERATING ON API FLANGES UNDER COMBINATION OF LOADING
Hardcopy , PDF
13-05-2013
English
01-11-1998
1 Scope
2 References
3 Introduction to rating charts
3.1 Introduction and scope
3.2 Material categories
3.3 Flange combined load capacities
3.4 Use of rating charts
4 Axisymmetric finite element analysis
4.1 Introduction
4.2 Finite element modeling
4.3 Assumptions
4.4 Material categories
4.5 Load cases
4.6 Analysis results
5 Flange combined load capacities
5.1 Introduction
5.2 Allowable stress criteria
5.3 Leak criteria
5.4 Stress linearization
5.5 Load rating methodology
5.6 Results
5.7 Use of rating charts
6 Conclusions and recommendations
6.1 Summary
6.2 Conclusion
6.3 Recommendation
Appendix A - Material category A
Appendix B - Material category B
Appendix C - Material category C
Appendix D - Material category D
Appendix E - Material category E
Appendix F - Material category F
Figures
1 Typical combined load capacity results
2 Load capacity results to use with example problems
3 Typical finite element meshes
4 Convection coefficients for air blowing across a 1-Ft
diameter cylinder as a function of wind speed and temperature
5 Load conditions for makeup and pressure
6 Load conditions for tension and bending moment
7 Load conditions for thermal and thermal stress analysis
8 Typical stress intensity contour plots for makeup and pressure
load conditions 7 1/6" 10,000 6BX flange
9 Typical stress intensity contour plots for tension and
bending moment load conditions
10 Typical contour plots for thermal analysis load conditions
7 1/16" 10,000 6BX flange
11 Typical stress intensity contour plots for makeup and pressure
load conditions 2 1/16" 2,000 6B flange
12 Typical stress intensity contour plots for tension and bending
moment load conditions 2 1/16" 2,000 6B flange
13 Typical contour plots for thermal analysis load conditions
2 1/16" 8,000 6B flange
14 Typical combined load capacity results
15 Load capacity results to use with example problems
Tables
1 List of materials
2 Derated values of material properties
3 List of materials
4 Derated values of material properties
5 API physical properties and material types
6 Controlling criteria identification numbers
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