Welcome to the section on Pressure Relief Systems

This Section covers the following:

• Objectives of pressure relief systems
  
• Over-pressure causes
  
• Inherently safer design
  
• General principles of relief systems
  
• Design of relief systems - general methodology
  
• Definitions, relationship between terminologies
  
• Location of relief devices, examples, decision tree
  
• Types of relief devices: relief valve, rupture disk, characteristics & design consideration, combination of relief valve and rupture disk, decision trees for selection
  
• Relief scenarios: various scenarios (fire, blocked outlet, utility failure, loss of cooling duty, etc), examples, double jeopardy
  
• Relief device installation
  
• Sizing of relief system: brief, no specific methods or equations covered
  
• Discharge of relief systems: principles, general consideration, methods (scrubber, flare, etc), operational considerations and limitation
  
• Plant emergency depressuring system: purpose, example and instrumentation
  
• High integrity protective system (HIPS): flare header over-pressure protection, example

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