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Companies for Construction, Repair and Connection - Requirements and Tests ++ PDF-Datei ++
This Standard GW 301 applies to companies which build, repair, and connect pipelines in gas and water supply systems using open trench construction.
Building Companies for Underground Line Construction – Minimum Requirements (identical with AGFW FW 600 and VDE-AR-N 4220) ++ PDF file ++
This technical rule GW 381 (AGFW Standard, DVGW Standard, VDE Application Rule) applies to companies for underground construction for lines operating in the sectors of district heating, gas, power, telecommunications and drinking water; it specifies minimum formal, personnel and technical requirements as well as optional criteria. Concerning the construction of the line itself as well as all associated aspects, there are specific technical rules.
Cathodic Protection (CP) of Buried Pipelines, Pipelines of Complex Structures and Steel Tanks; Planning, Construction, Commissioning, Operation and Maintenance ++ PDF file ++
This Standard GW 10 shall apply to the planning, construction, commissioning, operation and maintenance of ca-thodic corrosion protection (CP) of buried pipelines, storage vessels and buried steel LPG tanks, which are required to have cathodic protection. For all other buried installations with cathodic protection, this standard can be applied mutatis mutandis.
Welding Joints of Steel Pipelines for Gas and Water Supply; Manufacturing, Testing and Evaluation ++ PDF file ++
This Technical Rule GW 350 equally applies to water supply systems, which fall within the scope of DIN EN 805 and for which the DVGW Standards W 400-1 to W 400-3 have to be observed.
Closing-off Structures for Water Abstraction Wells ++ PDF file ++
This Code of Practice W 122 applies to closing- off structures of wells used for ground water production and reinjection for the purpose of drinking water and service water abstraction. It can analogously also be applied to the thermal utilisation of groundwater wells.
Technical Rules for Water Supply Systems; Part 1:
This Code of Practice W 400-1 applies to the design of water supply systems in the drinking water supply, including long-distance, feeder, main, supply and service lines.
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