This Standard W 1003 relates to the piped supply of public water under normal operating conditions. Covering the different technical aspects and value-added steps, it provides an integral overview of how to de-scribe, analyse and assess the resilience and security of supply in water supply areas.

This Technical Rule GW 350 in conjunction with DIN EN 12732 applies to the manufacture, testing and Evaluation of welds on steel pipelines and installations which serve to supply the general public with gas within the meaning of the Energy Industry Law (EnWG) or which are part of the associated energy installations on factory premises and in the area of operational gas use and which are to be operated with the gases ofthe 2nd gas family according to DVGW Standard G 260 or DVGW Standard G 262. It also applies to pipes in operation.For steel pipelines and installations for gases which do not comply with the provisions of the above DVGW standards, this technical rule may be applied mutatis mutandis taking into account the specific properties of the gases and any other existing provisions.

W 270 Technical Standard 11/2007

For the purposes of this Standard GW 381, the term ?minimum requirements? implies that further requirements canensue from technical rules and legal provisions and/or that the ordering party may stipulate further requirements,in particular in the presence of special features or needs for protection or other constraints. Theoptional criteria shall, without claiming to be exhaustive, be considered guidance for the ordering partywho shall decide on the need for further requirements.If a company consists of several units, this technical rule applies to the units in charge of undergroundconstruction and, without exception, to independent subsidiaries as well. A subsidiary shall be assumed tobe independent if, in effect, it actually controls most operations and/or if the head office of the company isunable to provide the supervision of the staff and the construction sites as required.

W 551 Code of Practice 04/2004

In accordance with ? 17 Par. 1 of the Drinking Water Ordinance of May 28, 2001, construction and other materials that when in contact with water release substances in concentrations higher than considered inevitable by the generally accepted engineering standards, or that directly or indirectly infringe the human health regulations stipulated by this Ordinance, or that alter the odour or flavour of the water, shall not be used for linings intended for use in contact with drinking water. The former Federal Health Agency has not issued any recommendations on cement‑bound and lining materials. As the physical behaviour of such materials differs from that of plastic materials, the Plastics and Drinking Water Recommendations (KTW recommendations) cannot be borrowed verbatim. This Code of Practice W 347 had to be reviewed in order to ensure that its contents reflect the state of the art and conform to the corresponding European Standards. This Code of Practice describes the requirements for and the testing of cement‑bound materials intended for use in drinking water supply systems.href= https://shop.wvgw.de/506643 >here.

GW 301 Technical Rule ‑ Standard 01/2021

DVGW Information WATER No. 108 02/2021

This document ISO 17885 specifies the requirements for mechanical fittings for joining plastic piping systems for the supply of gaseous fuels, the supply of water for human consumption and other purposes, as well as for industrial application. It provides a unified set of test methods to check the performance of the fittings, depending on their intended use. It is the responsibility of the purchaser or specifier to select the appropriate fitting, taking into account their particular requirements and any relevant national guidance or regulations and installation practices or codes.

GW 10 Technical Standard 06/2018

W 249 Technical Rule ? Standard 07/2012

W 202 Technical Rule ? Standard 03/2010

W 129 Technical Rule ? Standard 04/2012

W 127 Technical Rule ? Standard 03/2006

W 126 Technical Rule ? Standard 09/2007

This Code of Practice W 130 serves as a basis for the regeneration of wells and groundwater monitoring points. Ageing processes frequently compromise water well performance, adversely affecting, in turn, a well?s service life and economic mode of operation. Well operators therefore face the dual challenge of having to identify the most appropriate regeneration methods for each specific case and being able to evaluate the success of the measures taken. Eventually, a direct capacity increase will ensure the economically efficient operation of a well over the long term only when combined with sustainably successful measures. Any well regeneration measures will, therefore, depend on the nature and scope of ageing and on the constructional condition of the well as well as on groundwater protection requirements. This Code of Practice describes the current requirements on the technically safe and hygienically flawless implementation of well regeneration measures, points out the causes of and explains how to identify well ageing processes, among other things, and offers suggestions on how to delay them. It additionally describes the application options and limits of both mechanical and chemical regeneration procedures and/or methods. By applying this Code of Practice, well operators and contractors alike will be able to record and trace the results achieved by the regeneration measures and evaluate their success, from the planning to the implementation and on to the final phase.