DVGW German Technical and Scientific Association for Gas and Water (DVGW)
DWA German Association for Water, Wastewater and Waste
FIGAWA Federal Association of Gas and Water Companies
Güteschutz Kanalbau  
IRO Institute for pipeline construction at the University of Applied Sciences, Oldenburg
  Association of the North-West German Textile and Clothing Industry
DCA The Drilling Contractors Association (DCA-Europe) An European organisation for quality and education in HDD