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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.
Plastics Piping Systems for Gas and Water Supply; Requirements and Testing; Part A6: PA-U 160 and PA-U 180 Pipes and their Joints and Connections ++ PDF file ++
Hygiene requirements for cement-bound materials intended for use in drinking water supply systems - testing and evaluation ++ PDF file ++
This Code of Practice W 347 describes the tests and hygiene requirements for cement-bound materials in contact with drinking water or with raw water used for water abstraction purposes.It furthermore serves to verify the hygienic safety of all cement-bound materials listed in Table 1 that are used in the production of materials intended for use in contact with drinking water for the conditioning, storage and distribution of drinking water in accordance with § 17 Par. 1 of the Drinking Water Ordinance.
Microbial Enhancement on Materials to Come into Contact with Drinking Water - Testing and Assessment ++ PDF file ++
This standard W 270 describes a test method to determine the microbial growth on organic materials and materials containing organic components, foreseen to come into contact with drinking water or with water to become drinking water.
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