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Planning, Execution and Analysis of umping Tests in Groundwater Development ++ PDF ++
Since the publication of the 1997 edition of W 111, more experience has been gained, more findings have been made and new methods have been developed for executing and analysing pumping tests as well as for the electronic capture of data at optional intervals. The measurement behaviour of groundwater data loggers can now be programmed much more extensively; moreover, they can now transmit the collected data via radio-based systems like GSM or GRPS either immediately or according to a predefined schedule. This Code of Practice discusses the resultant opportunities for quality assurance and the analysis of the frequently very elaborate tests.
Security of Gas Supply; Organisation and Crises Management ++ PDF file ++
This Guideline G 1002 describes the fundamentals of corporate crisis management and provides relevant recommendations for operators as well as ample information on the disaster and crisis management organisation of the local authorities.
Restrained Socket Joints for ductile Iron and Steel Pipes, Fittings and Valves ++ PDF file ++
This worksheet GW 368 applies to the production and installation of restrained socket joint parts for securing cast iron or steel piping systems, consisting of pipes and fittings to GW 337 (P) and/or VP 637 as well as valves, for water supply purposes in accordance with the field of application of DVGW Worksheet W 400-1 and for gas supply with gases in accordance with DVGW Worksheet G 260.
Polyethylene coatings on steel pipes and and fittings - Requirements and testing; English translation of DIN 30670:2012-04 ++ PDF-Datei ++
Network and failure statistics Collection and processing of data for the maintenance of water distribution systems ++ PDF file ++
This Code of Practice W 402 applies to the collection and processing of inventory, condition and environmental data about water distribution systems. Condition data notably include failure data. This paper describes how to develop a consistent database and how to process failure data.
Maintenance of pumping stations ++ PDF-Datei ++
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