T-273 - Relief and Flare Systems


The course covers relief, flare and vent systems design.
It describes why specific equipment like separators and heat exchangers require relief protection and how to determine the relief cases for these items.
The various elements of the relief system, from relief valves through piping and headers to flare knock out drums and flare tips, are covered as is the methods for determining overall system and peak relief loads.
The course also covers how plant depressurising systems are configured and some of the specialised design principles such cold temperatures and acoustic vibration are critical to sound relief system design.

Designed for

Graduates from universities or technical colleges with up to 10 years work experience.
A Facilities or Process Engineer, either a Graduate or a more experienced Technical Profession-al looking to develop theoretical competence in relief and flare system design.
A Safety Engineer who seeks to gain competence in the principles and practices of relief and flare system design.
A Project Engineer or Manager who seeks greater understanding of the principles of sound relief and flare system design.
An Operations Engineer looking to deepen your knowledge of the design principles of the plants.


By the end of the course you will have a good understanding of how relief and depressurising systems are designed.
You will appreciate the importance of establishing all relief cases that apply and how these are equipment-specific.
You will know how to determine governing relief cases for the system and how to calculate peak relief system loads.
You will have an introduction to how staggering and staging depressurising systems can lower peak loads and how important cold temperatures and acoustic vibration are in the system design.

Competences addressed

  • Establishing Relief Cases
  • Overall Relief System Design
  • Components in the Relief System
  • Dispersion and Radiation calculations
  • Depressurisation
  • Flares and Vents design principles


2 days


The course links theory to application. It rein-forces this through real industry examples and allows participants to practice the theory through worked examples as part of the sessions. The course is highly interactive and participants are encouraged to share their own experiences and problems to the benefit of all. This course can be arranged for delivery at the client’s location and can also be tailored to the client’s wishes if desired.

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    Contact Michel Lensink

    Michel Lensink

    General Manager Support


    +316 50 69 48 14

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