WG 8 - Determination of static equivalent pressures of gas phase detonations in pipes and vessels
The scope includes the development of documents for process plants in which the occurrence of potentially detonable gas mixtures in pipelines and vessels and at the same time effective ignition sources cannot be excluded. This includes, for example, systems for water electrolysis, where the occurrence of flammable H2+O2 mixtures cannot be ruled out in the event of deviations from target operation. In systems for the transportation of hydrogen, H2/air mixtures can also occur in the event of incorrect air intake, which can also react detonatively after ignition. Under the above-mentioned boundary conditions (potential detonable gas mixtures and ignition sources present), the only possible protection concept according to the current explosion protection regulations is the intrinsically safe design of the pipelines or vessels. This means that the wall thicknesses of the pipelines or other containments must be dimensioned in such a way that under all conceivable process conditions (initial pressure, initial temperature, composition of the gas mixture, geometry of the pipeline/containment) the installations can withstand the pressures of shock waves that can occur in different possible detonative, not only deflagrative, pressure scenarios. In order to be able to design this dimensioning economically, a reliable and validated, standardized procedure for determining the static equivalent pressures that can be used in industrial practice is required. With this method, the oversized design of wall thicknesses due to a lack of knowledge about the pressure development can be avoided.
Determination of static equivalent pressures of gas phase detonations in pipes and vessels
The scope includes the development of documents for process plants in which the occurrence of potentially detonable gas mixtures in pipelines and vessels and at the same time effective ignition sources cannot be excluded. This includes, for example, systems for water electrolysis, where the occurrence of flammable H2+O2 mixtures cannot be ruled out in the event of deviations from target operation. In systems for the transportation of hydrogen, H2/air mixtures can also occur in the event of incorrect air intake, which can also react detonatively after ignition. Under the above-mentioned boundary conditions (potential detonable gas mixtures and ignition sources present), the only possible protection concept according to the current explosion protection regulations is the intrinsically safe design of the pipelines or vessels. This means that the wall thicknesses of the pipelines or other containments must be dimensioned in such a way that under all conceivable process conditions (initial pressure, initial temperature, composition of the gas mixture, geometry of the pipeline/containment) the installations can withstand the pressures of shock waves that can occur in different possible detonative, not only deflagrative, pressure scenarios. In order to be able to design this dimensioning economically, a reliable and validated, standardized procedure for determining the static equivalent pressures that can be used in industrial practice is required. With this method, the oversized design of wall thicknesses due to a lack of knowledge about the pressure development can be avoided.
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WG 8 is a Technical Committee within the European Committee for Standardization (CEN). It is named "Determination of static equivalent pressures of gas phase detonations in pipes and vessels" and is responsible for: The scope includes the development of documents for process plants in which the occurrence of potentially detonable gas mixtures in pipelines and vessels and at the same time effective ignition sources cannot be excluded. This includes, for example, systems for water electrolysis, where the occurrence of flammable H2+O2 mixtures cannot be ruled out in the event of deviations from target operation. In systems for the transportation of hydrogen, H2/air mixtures can also occur in the event of incorrect air intake, which can also react detonatively after ignition. Under the above-mentioned boundary conditions (potential detonable gas mixtures and ignition sources present), the only possible protection concept according to the current explosion protection regulations is the intrinsically safe design of the pipelines or vessels. This means that the wall thicknesses of the pipelines or other containments must be dimensioned in such a way that under all conceivable process conditions (initial pressure, initial temperature, composition of the gas mixture, geometry of the pipeline/containment) the installations can withstand the pressures of shock waves that can occur in different possible detonative, not only deflagrative, pressure scenarios. In order to be able to design this dimensioning economically, a reliable and validated, standardized procedure for determining the static equivalent pressures that can be used in industrial practice is required. With this method, the oversized design of wall thicknesses due to a lack of knowledge about the pressure development can be avoided. This committee has published 324 standards.
WG 8 develops CEN standards in the area of Information technology. The scope of work includes: The scope includes the development of documents for process plants in which the occurrence of potentially detonable gas mixtures in pipelines and vessels and at the same time effective ignition sources cannot be excluded. This includes, for example, systems for water electrolysis, where the occurrence of flammable H2+O2 mixtures cannot be ruled out in the event of deviations from target operation. In systems for the transportation of hydrogen, H2/air mixtures can also occur in the event of incorrect air intake, which can also react detonatively after ignition. Under the above-mentioned boundary conditions (potential detonable gas mixtures and ignition sources present), the only possible protection concept according to the current explosion protection regulations is the intrinsically safe design of the pipelines or vessels. This means that the wall thicknesses of the pipelines or other containments must be dimensioned in such a way that under all conceivable process conditions (initial pressure, initial temperature, composition of the gas mixture, geometry of the pipeline/containment) the installations can withstand the pressures of shock waves that can occur in different possible detonative, not only deflagrative, pressure scenarios. In order to be able to design this dimensioning economically, a reliable and validated, standardized procedure for determining the static equivalent pressures that can be used in industrial practice is required. With this method, the oversized design of wall thicknesses due to a lack of knowledge about the pressure development can be avoided. Currently, there are 324 published standards from this technical committee.
The European Committee for Standardization (CEN) is a public standards organization that brings together the national standardization bodies of 34 European countries. CEN provides a platform for developing European Standards (ENs) and other technical documents in relation to various products, materials, services, and processes, supporting the European Single Market.
A Technical Committee (TC) in CEN is a group of experts responsible for developing international standards in a specific technical area. TCs are composed of national member body delegates and work through consensus to create standards that meet global industry needs. Each TC may have subcommittees (SCs) and working groups (WGs) for specialized topics.