CSE-Engineering Center of Safety Excellence GmbH

The next level in process and plant safety

12 well-known industrial companies, one demanding goal: to evaluate existing methods and models for the sizing of safety devices for pressure vessels and make them available for economic and sustainable quality management in process and plant safety.

Welcome to the EURISG Group.



The protection of pressure vessels in industrial plants is a highly complex undertaking and poses enormous challenges, especially for large, globally positioned companies. In the sizing of safety equipment for containers, tanks, columns, heat exchangers, reactors, etc., regulations hardly go beyond simple standard cases. In addition, there are numerous publications with methods and models, the results of which are often far apart. Nevertheless, a World Class Level is expected from safety service providers, internal specialist departments or external specialists. As a consequence, each plant is considered and calculated as an individual case. That can be neither from view of the industry nor the public satisfying.

The EURISG Group is working on results that go far beyond the previous approaches of professional exchanges and round robin calculations



  • Swell-up in reactors during an emergency relief
  • Sizing of safety relief lines including safety valves and rupture disks
  • Pressure drop and mass flow through piping elements and pipes
  • Comparison of case studies with the results of calculation programs

Potential scenarios:

  • Runaway of exothermal reactions
  • Underfiring of technical plants
  • Uncontrolled heating/steam supply
  • Breakdown of cooling, inertisation, presurization, steam, electricity
  • Solar radiation on pipes and storage tanks
  • Fast shut down of plant components
  • Storage tanks: vaccum pressure caused by pumping out, condensation of the inner atmosphere
  • Failure of heating or the inert gas supply
  • Reflux into pumps and compressors
  • Operating errors or malfunction/failure of sensors

Fluids & properties:

  • Gaseous substances / liquids
  • Real gases / vapours
  • Flashing of liquids
  • Mixtures
  • Viscosity of fluids
  • degassing of gases out of liquids

How does EURISG work?

In quaterly held meetings the EURISG group defines safety-related case studies and presents and discusses methods, models and approaches from the literature. CSE-Engineering is responsible for the coordination of the dates, the organisation of meetings, the provision of premises and the preparation of sample solutions for the case studies.

The sample solutions (CSE sizing reports) are distributed to the participants in advance. During a meeting the CSE sizing reports are discussed and industrial experiences are exchanged on how to approach a sufficient solution for the sample case.

CSE-Engineering documents the individual case studies in EURISG Sizing Case Reports and gives recommendations for the approach in EURISG Sizing Recommendations.

Revision status of the EURISG documents

The documents that were elaborated within the EURISG group are being updated continually. An overview of the revisions can be found here:

open_in_new EURISG revision status

Opportunities to participate in EURISG:

If you are interested in taking part in EURISG please contact us:

email eurisg@cse-engineering.de

Antitrust Statement

The participants of the EURISG Group comply with the antitrust law. In particular, no anti-competitive agreements are being made concerning the following topics:

  • prices, division of territory or the like between competing companies
  • information about prices, sales, business transactions etc.

An open_in_new Antitrust Guideline was made available to all participants.