Pressure Relief

Topic Safety

CPD Hours 17.75

This is an IChemE approved training course and not delivered directly by the Institution. For more information about the course, contact the training provider directly.


This course has been designed specifically to enhance the skills needed for sound pressure relief design. With TÜVR Industrial Services’ extensive experience of pressure relief system design and operation, providing a practical perspective based on real life experience comes naturally.

Pressure relief can be caused by a number of events including fire, reaction runaway, thermal expansion and process abnormality. Incorrect design of pressure relief systems continues to result in major safety and environmental incidents with resultant business consequences. Incidents can occur as a result of failure to provide relief, inadequate relief capacity, disposal system failure or incorrect design and installation.

A structured approach to pressure relief design is vital to ensure protection of plant from excessive over and under pressure. This course is based on TÜVR Industrial Services’ extensive experience of design installation and maintenance of relief systems, and covers a state-of-the-art methodology, based on a life cycle approach to pressure relief.

Additional dates are available visit the TÜV Rheinland Industrial Services website.

Learning outcomes

  • Improve your company's overall business safety and environmental performance
  • Get pressure relief design right first time and avoid costly mistakes
  • Discover the potential cost-effective alternatives to pressure relief
  • Master a structured approach to pressure relief

Course outline

  • What is pressure relief and why use it?
  • Approach to pressure relief design
  • Pressure relief and the design process
  • Pressure relief design team/responsibilities
  • Inherent safety and alternatives to pressure relief
  • Identification of relief events
  • Identification of events leading to excessive pressure and vacuum
  • Calculating the required relief rate
  • External fire
  • Fluid flow from high pressure source
  • Heat and energy input from associated equipment
  • Pumps and compressors
  • Ambient heat transfer
  • Liquid expansion in pipe
  • Discharge and disposal
  • Relief device hardware
  • Anatomy of a safety valve
  • Bursting disc hardware
  • Devices for special applications
  • Selection and types of relief devices
  • Relief system sizing
  • Safety valve sizing
  • Design criteria for relief systems
  • Computer software and pressure relief
  • Installation, inspection and maintenance
  • Relief system documentation
  • Installation of pressure relief devices - piping, isolation, drains, etc
  • Relief systems inspection, maintenance and operation
  • Pressure relief codes and legislation
  • Chemical reaction hazards - developing a basis of safety for chemical reaction hazards
  • Blowdown and flares
  • Two phase flow
  • Two phase flow design principles
  • Two phase flow and the DIERS method
  • Low pressure tanks
  • Venting of low-pressure tanks

Who will benefit

Plant, production and safety managers, process and chemical engineers, piping and project, mechanical and control engineers and regulators, safety and environment specialists.

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