Integrated Safety Concept of DVGW in Terms of Statistical Verification of Incidents
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The guarantee of a high safety standard of the gas infrastructure must be the highest goal of economic and operational action within the framework of proceeding national and European regulation and the organisational changes interrelated in the companies. At the beginning of the 1990th DVGW, the German Association for Gas and Water, developed an integrated safety concept and thereby set a milestone for the evaluation and reduction of incidents and accidents in the German gas infrastructure. The basis for the development of the cause-oriented tool box was the statistical analysis of data coming from the incidents and accident statistics of DVGW. By means of this precise technical and process improvements as well as further trainings and awareness campaigns could be developed and introduced which have led to a high safety level within the German gas infrastructure. In the period from 1981 until today the tendency of the absolute total incident rates has been decreasing and is presently moving on a low historical level. The normalised incident rates on gas pipelines (transport and distribution network) are also decreasing and have stagnated for at least ten years independent from the pressure range. Furthermore, besides the evaluation and analysis of security-relevant operating statistics communication and reporting have a major significance. Regarding gas incidents and accidents the prompt availability of information is a substantial requirement in order to be able to give statements opposite market partners, the public and legal authorities and in order to specify causes and give professional assessments. In the meantime, since 2012 the registration of asset inventory and incident data of gas infrastructures has been a firm part of DVGW’s technical rules. The data registration criteria described in the technical rule G 410 comprise the following reports: • Inventory data for gas pipelines, gas service lines and gas-related facilities, • incident data for gas pipelines, gas service lines and gas-related facilities and • customer installations of domestic and industrial gas usage, gas odour notifications, • indications of interruptions of supply according to the Energy Industry Act. This common and unique data pool forms the basis of the periodical report of results which informs about security-relevant trends in the German gas sector. The first report was published in 2016. The results are presented in the presentation.