API 6F1 : 1999

Table of Contents

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

Abstract

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.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	American Petroleum Institute
Pages
ISBN