BS 6755-2(1987) : 1987

Foreword
Committees responsible
Section one. General
1. Scope
2. Definitions
Section two. Conditions of test
3. Direction and conditions for valves to be tested
4. Pressure relief provision
Section three. Performance
5. General
6. Through-seat leakage (high test pressure) during
     burn period
7. External leakage (high test pressure) during burn
     and cool-down periods
8. Through-seat leakage (low test pressure) after
     cool-down
9. External leakage (low test pressure) after cool-
     down
10. Operability
11. External leakage in fully open position
Appendices
A. Fire test method
B. Qualification of valves by representative size and
     pressure rating
C. Additional information to be included in the test
     report
Tables
1. Test pressures for PN and Class rated valves
2. Other valves qualified according to size
3. Other valves qualified by PN rating
4. Other valves qualified by Class rating
Figures
1. Recommended systems for fire type-testing of valves
     (schematic)
2. Calorimeter cube design and dimensions
3. Location of calorimeter cubes and flame environment
     thermocouples for DN 150 (NPS 6) and smaller size
     valves
4. Location of calorimeter cubes and flame environment
     thermocouples for valves larger than DN 150 (NPS 6)

Describes fire type-testing requirements and the fire type-test method for confirming the pressure-containing capability of a valve under pressure during and after the fire test. Where requirements in a valve product standard differ from those in this standard, then requirements of product standard apply.