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Safety & Pressure Relief Valves: Optimum Safety & Performance
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Introduction
Types of devices
Useful terminologies
Relief and Safety valves
Safety valves
Safety valves : Pressure setting
Safety valves : 3D dismantling
Safety valves : 2D dismantling
Relief valves
Relief valves : Valve operation in 2D cross-sectional view
Relief valves : 3D dismantling
Relief valves : 2D dismantling
More on spring loaded design
More on spring loaded design : 3D animation
Material of construction
Back pressure considerations
Dynamic back pressure (built-up back pressure)
Seat leakage
Testing safety valves with air or nitrogen
Introduction
API Codes and Standards
ASME Codes and Standards
ANSI Codes and Standards
Other Codes and Standards
Approval authorities
Sizing safety valves : Heads-up
Safety message
Introduction
Setting and sealing
Effect of back pressure on set pressure
Pressure level relationships according to API RP520
Safety valve positioning
Example #1 : Positioning a steam application safety valve
Example #2 : Positioning a process safety valve
Keep in mind and always remember !
Introduction
Finding the fault flow
Coefficient of discharge
Sizing equations for steam 1/3 : General equation
Example #3 : Sizing a safety valve for a steam application
Sizing equations for steams 2/3 : Wet Steam
Sizing equations for steams 3/3 : Dry Saturated Steam and Superheated Steam
Example #4 : Sizing a safety valve for Superheated Steam
Sizing for liquids and gases - Intro
Required sizing data
Sizing for gases : 10% Overpressure - Mass flow rate (lb/h)
Sizing for gases : "C" coefficient
Sizing for gases : "Kb" coefficient
Sizing for gases : Compressibility factor
Example #5 : Atmospheric back pressure
Example #6 : Constant superimposed back pressure
Example #7 : Set pressure below 30 psig
Example #8 : Variable superimposed back pressure
Sizing for gases : 10% Overpressure - Standard Volumetric flow rate (scfm)
Example #9 : Variable built-up back pressure
Sizing for liquids
Sizing for liquids : "Kw" coefficient
Sizing for liquids : "Kv" coefficient
Example #10 : Sizing for a non-viscous liquid application
Example #11 : Sizing for a viscous liquid application
Multiple valve sizing
Noise level calculations
Noise intensity
Example #12 : Noise level calculations
Sizing for vaporizing liquids - Fire conditions
Logic diagram for effective liquid level calculation
Example #13 : Sizing for fire conditions (liquids)
Sizing for gases and vapors only - Fire conditions
Example #14 : Sizing for fire conditions (gases and vapors only)
Capacity conversion
Example #15 : Converting a propane PRV
Introduction
Piping connection
Excessive pressure drops
Isolation valves
More on piping connection
Calculating piping losses
Entrance effects
Piping inlet losses
Upstream devices
Example #16 : Evaluating existing safety protection
Calculating outlet piping
Example #17 : Calculating discharge piping diameter
Reaction forces
Frequent installation mistakes
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Design fundamentals
Introduction
Preview
Types of devices
Useful terminologies
Relief and Safety valves
Safety valves
Safety valves : Pressure setting
Safety valves : 3D dismantling
Safety valves : 2D dismantling
Relief valves
Relief valves : Valve operation in 2D cross-sectional view
Relief valves : 3D dismantling
Relief valves : 2D dismantling
More on spring loaded design
More on spring loaded design : 3D animation
Material of construction
Back pressure considerations
Preview
Dynamic back pressure (built-up back pressure)
Seat leakage
Testing safety valves with air or nitrogen
Codes and Standards
Introduction
API Codes and Standards
ASME Codes and Standards
ANSI Codes and Standards
Other Codes and Standards
Approval authorities
Sizing safety valves : Heads-up
Safety message
Safety valves selection
Introduction
Setting and sealing
Effect of back pressure on set pressure
Pressure level relationships according to API RP520
Safety valve positioning
Example #1 : Positioning a steam application safety valve
Example #2 : Positioning a process safety valve
Preview
Safety valves sizing
Keep in mind and always remember !
Introduction
Preview
Finding the fault flow
Coefficient of discharge
Sizing equations for steam 1/3 : General equation
Example #3 : Sizing a safety valve for a steam application
Sizing equations for steams 2/3 : Wet Steam
Sizing equations for steams 3/3 : Dry Saturated Steam and Superheated Steam
Example #4 : Sizing a safety valve for Superheated Steam
Sizing for liquids and gases - Intro
Preview
Required sizing data
Sizing for gases : 10% Overpressure - Mass flow rate (lb/h)
Sizing for gases : "C" coefficient
Sizing for gases : "Kb" coefficient
Preview
Sizing for gases : Compressibility factor
Example #5 : Atmospheric back pressure
Example #6 : Constant superimposed back pressure
Example #7 : Set pressure below 30 psig
Example #8 : Variable superimposed back pressure
Sizing for gases : 10% Overpressure - Standard Volumetric flow rate (scfm)
Example #9 : Variable built-up back pressure
Sizing for liquids
Sizing for liquids : "Kw" coefficient
Sizing for liquids : "Kv" coefficient
Preview
Example #10 : Sizing for a non-viscous liquid application
Example #11 : Sizing for a viscous liquid application
Multiple valve sizing
Noise level calculations
Noise intensity
Example #12 : Noise level calculations
Sizing for vaporizing liquids - Fire conditions
Logic diagram for effective liquid level calculation
Example #13 : Sizing for fire conditions (liquids)
Sizing for gases and vapors only - Fire conditions
Example #14 : Sizing for fire conditions (gases and vapors only)
Capacity conversion
Example #15 : Converting a propane PRV
Safety valves installation
Introduction
Piping connection
Excessive pressure drops
Isolation valves
Preview
More on piping connection
Calculating piping losses
Entrance effects
Piping inlet losses
Upstream devices
Example #16 : Evaluating existing safety protection
Calculating outlet piping
Example #17 : Calculating discharge piping diameter
Reaction forces
Frequent installation mistakes
Downloadable resources
Download me
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