Chapter 1: 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

Chapter 2: 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

Chapter 3: 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

Chapter 4: 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

Chapter 5: 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

• Engineers In-Training,
• Recent College graduates,
• Engineering Students
• Chemical, Process, Petroleum Engineers
• Piping, Plant Engineers
• Mechanical Engineers
• Pilot Plant Engineers
• Maintenance Technicians
• Plant Operators
• Safety Engineers

Introduction

1. About This Course – 02:19

2. Disclaimer – 00:29

3. Why use a Pressure Relief Device – 05:15

4. Key Definitions – 02:06

5. Objectives of a Safety Relief Valve (SRV) – 06:18

6. Pressure Relief Valve (PRV) vs Rupture Disc – 09:05

7. Pressure Relief Devices (RPDs) in Series – 07:06

Types & Operating Characteristics of Relief Devices

8. Weight Loaded Relief Valves – 08:27

9. Spring Loaded Pressure Relief Valves (PRV) - Backpressure – 04:07

10. Conventional vs Balanced Pressure Relief Valves (PRVs) – 05:59

11. Basic Definitions – 10:41

12. Conventional PRVs – 04:41

13. Closed Bonnet vs Open Bonnet – 01:50

14. Elements of a PRV – 07:44

15. Gas vs Liquid PRVs – 09:35

16. Balanced PRVs – 02:58

17. Pilot Operated Relief Valves – 05:57

18. Rupture Discs – 03:55

19. Rupture Pin Technology – 01:19

Standards and Code

20. Standards and Code – 04:37

21. ASME Code – 04:25

22. ASME Certification Process – 03:20

23. API Standards – 07:01

Overpressure Scenarios and Philosophy

24. Overpressure Philosophy Introduction – 08:44

25. Reasonable vs Unreasonable Overpressure Scenarios – 04:23

26. Double Jeopardy – 01:15

27. Operator Error – 05:46

28. Instrumentation for Overpressure Protection – 02:21

29. Closed Outlets Example 1 – 07:38

30. Closed Outlets Example 2 – 01:15

31. Inadvertent Valve Opening Example 1 – 04:22

32. Check Valve Failure – 04:13

33. Utility Failure – 07:43

34. Plugged Filter – 01:45

35. Heat Exchanger Failure - Points to Consider – 08:54

36. Control System Failure – 03:17

37. Chemical Reaction & Hydraulic Expansion – 02:26

38. Fire Overpressure – 02:59

39. Fire - Liquid Filled Vessel – 15:26

40. Fire - Liquid Filled Vessel Example 1 – 08:09

41. Fire - Gas Filled Vessel – 14:27

42. Fire Management Tips – 01:59

43. Overpressure Final Notes – 03:10

44. Does a PSV Solve All Overpressure Scenarios – 02:11

45. Underpressure – 06:39

46. Relief System Package – 10:40

Sizing Calculations

47. Pressure Relief Sizing Roadmap – 11:40

48. Learning Objectives – 01:48

49. PRV Sizing Guidelines in Accordance with API & ASME Requirements – 06:03

50. PRV Sizing Considerations – 01:42

51. PRV Inlet Piping Pressure Loss – 02:05

52. PRV Outlet Piping Pressure Loss – 03:19

53. CDTP – 03:35

54. Relieving Pressure – 17:39

55. Effective vs Actual – 03:51

56. PRV Sizing Equations - Critical Flow – 06:16

57. PRV Sizing Equations - Critical Flow Example – 09:37

58. PRV Sizing Equations - Subcritical Flow – 02:36

59. PRV Sizing Equations - Subcritical Flow Example – 10:48

60. PRV Sizing Equations - Steam Flow – 03:17

61. PRV Sizing Equations - Steam Flow Example – 04:49

62. PRV Sizing Equations - Liquid Flow – 03:58

63. PRV Sizing Equations - Liquid Flow Example 1 (Low Viscosity) – 05:23

64. PRV Sizing Equations - Liquid Flow Example 2 (High Viscosity) – 09:53

65. Rupture Disc Sizing Guidelines in Accordance with API & ASME Requirements – 04:32

66. Rupture Disc Burst Pressure Range – 06:12

67. Rupture Disc Burst Pressure Range Example 1 – 06:30

68. Rupture Disc Burst Pressure Range Example 2 – 02:19

69. Rupture Disc Sizing Steps – 02:51

70. Rupture Disc Selection and Specification – 03:08

71. Rupture Disc Sizing Method - Coefficient of Discharge Method – 03:49