EURISG

European Industrial Sizing Group

Experience exchange of safety experts within the chemical, petrochemical and pharmaceutical industry to conduct latest interpretation of the state of technology, share experience and to harmonize industrial safety approaches thoughout companies.

Current participants:

 

The Project

Topic:

Organizer:

Participants:

Language:

Period:

Pressure relief of pressurized equipment and plants

CSE-Engineering Center of Safety Excellence GmbH

14 well-known companies

German

min. 3-4 years

The Project

Topic:
Pressure relief of pressurized equipment and plants

Organizer:
CSE-Engineering Center of Safety Excellence GmbH

Participants:
14 well-known companies

Language:
German

Period:
min. 3-4 years

The European Industrial Sizing Group (EURISG) evaluates under the auspice of CSE-Engineering typical industrial methods and models for the sizing of safety relief systems installed on reactors, pressurized equipment or for storage tanks. Compared to the complexity of industrial plants only a minority of methods, models and apporaches are specified in standards. Every company has to determine them individually. Neither for the industry nor for regulators or authorithies this is a satisfying procedure. The aim of the EURISG group is to evaluate how to size safety relief ventline systems conservatively to be able to achieve a consistent and higher level of safety for technical plants.

The objective of the EURISG group is not to work on standardization but to share knowlegde and experience in case standards are not available or do not provide a complete answer. There are no restictions for the participation in the group.

What does EURISG do?

Topics of discussion are:

  • 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 for sizing cases are:

  • 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.

The substantial properties of the fluids and their changes during the relief under flow conditions have to be considered. Examples are:

  • 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 compares the accuracy and application limits of methods and models with experimental data in the literature. These results are published in an EURISG Model Validation Report and discussed in an EURISG meeting if necessary.
In addition, the validation and description of the models and application limits document the current state of knowledge.

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

What makes EURISG unique?

The variety of original industrial topics and the intensive discussion in meetings including a share of high valued experience lead to the unique work of the EURISG group. Within the EURISG group the solutions of industry-typical case studies are documented uniformly and comprehensibly. This enables quality management in the field of safety technology and the education of junior safety experts is simplified.

Participants of the EURISG group reach a very high level of knowledge and meet their due diligence for the development of solutions in the industry. The extent and depth of the solutions, the consequent documentation and calculated expamples of each industrial case studies are beyond any comparable experience exchange.

Antitrust statements

The European Industrial Sizing Group intents to elaborate a high qualtiy experience exchange to further increase the safety of technical plants comprehensibly. The exchange of experience within the group concerns published and therefore publicly available methods and models whose practical application usually is only possible with a multitude of assumptions.

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 Antitrust Guidline was made available to all participants.

What does EURISG do?

Topics of discussion are:

  • 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 for sizing cases are:

  • 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.

The substantial properties of the fluids and their changes during the relief under flow conditions have to be considered. Examples are:

  • 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 compares the accuracy and application limits of methods and models with experimental data in the literature. These results are published in an EURISG Model Validation Report and discussed in an EURISG meeting if necessary.
In addition, the validation and description of the models and application limits document the current state of knowledge.

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

What makes EURISG unique?

The variety of original industrial topics and the intensive discussion in meetings including a share of high valued experience lead to the unique work of the EURISG group. Within the EURISG group the solutions of industry-typical case studies are documented uniformly and comprehensibly. This enables quality management in the field of safety technology and the education of junior safety experts is simplified.

Participants of the EURISG group reach a very high level of knowledge and meet their due diligence for the development of solutions in the industry. The extent and depth of the solutions, the consequent documentation and calculated expamples of each industrial case studies are beyond any comparable experience exchange.

Antitrust statements

The European Industrial Sizing Group intents to elaborate a high qualtiy experience exchange to further increase the safety of technical plants comprehensibly. The exchange of experience within the group concerns published and therefore publicly available methods and models whose practical application usually is only possible with a multitude of assumptions.

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 Antitrust Guidline was made available to all participants.

Opportunities to participate in EURISG

If you are interested in taking part in EURISG please contact us:
eurisg@cse-engineering.de

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:

EURISG revision status

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