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BS ISO 4126-10:2010 Safety devices for protection against excessive pressure - Sizing of safety valves for gas/liquid two-phase flow, 2010
- Scope
- Normative references
- Terms and definitions
- Symbols and abbreviated terms
- Application range of the method [Go to Page]
- General
- Limitations of the method for calculating the two-phase mass [Go to Page]
- General
- Flashing flow
- Flashing flow for mixtures
- Dissolved gases
- Limitations of the method for calculating the mass flow rate [Go to Page]
- Rate of temperature and pressure increase
- Immiscible liquids
- Sizing steps [Go to Page]
- General outline of sizing steps
- Step 1 — Identification of the sizing case
- Step 2 — Flow regime at safety valve inlet [Go to Page]
- General
- Phenomenon of level swell
- Influence of liquid viscosity and foaming behaviour on the f
- Prediction of the flow regime (gas/vapour or two-phase flow) [Go to Page]
- General
- Recommended calculation procedure in case of generation of h
- Recommended calculation procedure in case of external heatin
- Step 3 — Calculation of the flow rate required to be dischar [Go to Page]
- General
- Pressure increase caused by an excess in-flow
- Pressure increase due to external heating [Go to Page]
- General
- Mass flow rate required to be discharged
- Pressure increase due to thermal runaway reactions [Go to Page]
- General
- Tempered (vapour pressure) systems
- Gassy and hybrid systems
- Step 4 — Calculation of the dischargeable mass flux through [Go to Page]
- General
- Two-phase flow valve discharge coefficient, Kdr,2ph
- Flow coefficient, C
- Compressibility coefficient, (
- Critical pressure ratio, (crit
- Step 5 — Proper operation of safety valves connected to inle
- Scope
- Normative references
- Terms and definitions
- Symbols and abbreviated terms
- Application range of the method [Go to Page]
- General
- Limitations of the method for calculating the two-phase mass [Go to Page]
- General
- Flashing flow
- Flashing flow for mixtures
- Dissolved gases
- Limitations of the method for calculating the mass flow rate [Go to Page]
- Rate of temperature and pressure increase
- Immiscible liquids
- Sizing steps [Go to Page]
- General outline of sizing steps
- Step 1 — Identification of the sizing case
- Step 2 — Flow regime at safety valve inlet [Go to Page]
- General
- Phenomenon of level swell
- Influence of liquid viscosity and foaming behaviour on the f
- Prediction of the flow regime (gas/vapour or two-phase flow) [Go to Page]
- General
- Recommended calculation procedure in case of generation of h
- Recommended calculation procedure in case of external heatin
- Step 3 — Calculation of the flow rate required to be dischar [Go to Page]
- General
- Pressure increase caused by an excess in-flow
- Pressure increase due to external heating [Go to Page]
- General
- Mass flow rate required to be discharged
- Pressure increase due to thermal runaway reactions [Go to Page]
- General
- Tempered (vapour pressure) systems
- Gassy and hybrid systems
- Step 4 — Calculation of the dischargeable mass flux through [Go to Page]
- General
- Two-phase flow valve discharge coefficient, Kdr,2ph
- Flow coefficient, C
- Compressibility coefficient, (
- Critical pressure ratio, (crit
- Step 5 — Proper operation of safety valves connected to inle [Go to Page]