API TR 6F1 : 1999

0 Introduction
1 Scope and Applicability
1.1 Effects of Fire Environment
1.2 Significant Variables
2 References
3 Performance of API and ANSI end Connections in the Standard
        Fire Test of Specification 6FA
3.1 Introduction
3.2 Makeup Assumptions
3.3 General Predictions
4 Comparison of Predictions and Test Data
5 Conclusions and Guidelines
Appendix A Analysis of ANSI and API Flanges
Appendix B Analysis of Clamp Type Connectors
Appendix C Retaining Loads and Unseating Conditions for BX
             Gaskets
Appendix D Effective Clamp Stiffness Calculations
Appendix E Metric Conversions
Figures
1 Typical Calculated Temperatures of Joints
2 Average Calculated Temperatures of Various Joints Carbon
         Steel at 30 Minutes
A-1 Correlation of Temperature Gradients Across Flanges
A-2 Idealized Model of Flanged Joint
A-3 C Factor for Equation A-5, 6B Flanges
A-4 C Factor for Equation A-5, 6BX Flanges
A-5 C Factor for Equation A-5, ANSI Flanges
A-6 Stress/Strain SA 193 B7
B-1 Correlation of Temperature Difference Between Clamp and Hubs
B-2 Radial Expansion Differential Calculations
B-3(a) AWHEM Clamp-Type Connection Major Dimensions
B-3(b) AWHEM Clamp-Type Connection Computer Output
C-1 Sketch of BX Gasket
D-1 Equivalent Clamp Hoop Stiffness
Tables
1 Sizes of Interest
2 Materials and Gaskets of Interest
3 Classifications
4 Classification Summary of ANSI Carbon Steel Flanges Performance
         Prediction in Standard Fire Test
5 Classification Summary of 316 Stainless ANSI Flanges Performance
         Prediction in Standard Fire Test
6 Classification Summary of API Flanges and Clamp Performance
         Prediction in Standard Fire Test
7 Materials of Test Flanges
8 Results of Testing Carefully Instrumented Tests
9 Results of Testing Original Screening Tests
A-1 API Type RX Pressure Energized Ring Gaskets Predicted Values
         for Seating and Retaining Loads
A-2 Moduli of Elasticity psi x 10(6)
A-2 Coefficients of Thermal Expansion Mean in Going from 70 deg to
         Temperature in./in. x 10(6)/def F
A-3 Yield Strengths

Defines a result of four projects to test the performance of API and ANSI end connections in a fire test according to API Specification 6FA, where the appendixes cover the analytical procedure used to generate performance prediction.