Introduction to Pressure Relief Devices
- Understand the purpose of pressure relief valves (PRVs) in industrial systems
- Compare pressure relief valves vs rupture discs — pros, cons, and typical use cases
- Learn the function of relief devices in series and when dual protection is required
Types of Relief Devices and How They Operate
- Explore the types of pressure relief valves: spring-loaded, weight-loaded, balanced, and pilot-operated
- Understand the impact of back pressure on PRV performance
- Compare conventional vs balanced pressure relief valves
- Learn key pressure safety definitions:
- Set pressure, design pressure, maximum allowable working pressure (MAWP), overpressure, accumulation, blowdown, closing pressure, relieving conditions
- Identify the mechanical components of a PRV
- Understand open vs closed bonnet designs
- Learn the differences between gas relief valves and liquid relief valves
- Introduction to:
- Balanced PRVs
- Pilot-operated PRVs
- Rupture disc devices
- Rupture pin technology
Pressure Relief Standards and Codes
- Understand the difference between codes vs standards
- Introduction to ASME Boiler and Pressure Vessel Code (BPVC)
- Overview of ASME certification requirements for PRVs
- Introduction to API 520, 521, and 526 standards related to relief valve sizing and design
Overpressure Protection Scenarios and Design Philosophy
- Identify common overpressure scenarios in process industries
- Differentiate between reasonable and unreasonable scenarios
- Understand the concept of double jeopardy in risk assessment
- Analyze causes of overpressure with examples:
- Operator error
- Instrumentation failure
- Blocked or closed valves
- Check valve failure
- Utility failure (e.g., cooling water, steam, power)
- Plugged filters or vents
- Heat exchanger tube rupture
- Chemical reactions
- Hydraulic expansion
- Fire exposure:
- Fire in liquid-filled vessels scenario
- Fire in gas-filled vessels scenario
- Learn best practices for fire overpressure protection
- Understand the limits of PRVs — when additional safeguards are needed
- Introduction to underpressure scenarios and vacuum relief
- Learn about the required documentation for a complete relief system design package
Relief Valve Sizing Calculations and API/ASME Methodology
- Follow API/ASME-compliant pressure relief valve sizing guidelines
- Understand key sizing considerations:
- Orifice area selection
- Effective area vs actual area
- Rated vs effective discharge coefficient (Kd)
- Review PRV inlet pressure loss and outlet back pressure limitations
- Understand Cold Differential Test Pressure (CDTP)
- Determine relieving pressure for:
- Single-failure contingencies
- Multiple (double) contingencies
- Fire case scenarios
Perform PRV Sizing Calculations for:
- Gas service – Critical flow
- Gas service – Subcritical flow
- Steam relief valves
- Liquid relief valves (High Viscosity and Low Viscosity)
Rupture Disc Sizing and Selection
- Learn rupture disc sizing methodology under API/ASME
- Define and apply:
- Burst pressure
- Manufacturing range
- Burst tolerance
- Operating ratio
- Understand how to select, specify, and size rupture discs for industrial applications
| https://www.udemy.com/course/pressure-relief-valve-sizing-selection-asmeapi/?srsltid=AfmBOorANHUqQwJBO4lREGPZMtHb4d78RU9QfZzI3vVMPd9oTTlLUOqP& |