In Germany “DVGW – German Technical and Scientific Association for Gas and Water” is the competence network for all questions related to gas and water. DVGW CERT GmbH is the largest gas and water industry certification body in Europe, covering all the certification procedures required in the gas and water. DVGW Deutsche Vereinigung des Gas- und Wasserfaches e.V.. Technisch- wissenschaftlicher Verein. Josef-Wirmer-Str D Bonn. Telefon: +49 (0)

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The recipe must, dependent on the type of material, be in accordance with the actual positive list of elastomer vdgw, KTW guideline or coating guideline.

Marking of water meter body housings acc. to DVGW Worksheet W

For the disclosure of the recipe a confidentiality agreement can be signed. Documents ready for download – click here! ERHARD is one of the most important manufacturers of water valves in the world with experience dating back over years The validity of a W test certificate is based on elsewhere specified regulations but ends 5 years after date of issue.

Thus it is a material test and only for multilayer systems such as composite pipes the test is carried out on the product. In addition it cooperates with more than 40 DVGW-recognized testing laboratories in the field of gas technology, electrical engineering, mechanical engineering, material testing, plastics, drinking water and hygiene. With a DVGW CERT certificate, product manufacturers, specialist companies, utilities and experts can demonstrate to their customers and market partners that they comply with the state of the art in their field of activities.


DVGW W – Drinking water approval for materials Materials which are used in the drinking water sector, must have a surface which excludes an unwanted surface fouling by microorganism.

DVGW – Innovation and setting standards in the gas and water sectors

If you continue to use vdgw website, you agree to the use of cookies. Testing and Certification Ensuring safety, hygiene and quality standards. Together with test laboratories, the company certifies and monitors gas and water industry products, quality and environmental management systems to DIN EN ISO ff. Quality assurance for energy and water supply. Technical innovations can only be beneficial if they actually work in practice. This is very important for the hygienic- microbiological point of view.

Safety and Quality Management. It is necessary that in addition to various technical and mechanical requirement also be guaranteed the hygienic.

Nitrates and Drinking Water. For disclosure of recipe all the substances and additives have to be identified. List of English Standards. Gas and Energy Transition. The certificate automatically becomes invalid if the requirements, even for the composition, change, or if the recipe or production is modified. Svgw which are used in the drinking water sector, must have a surface which excludes an unwanted surface fouling by microorganism.

Under certain conditions, a prolongation for further five years is possible. Service Portfolio Testing and Certification. Vocational Dvyw and Qualifications. Impartiality, quality and reliability are the top priorities in certification work.


Standardisation List of English Standards. This approach ensures that the individual procedures are tailored rvgw the needs of the gas and water industries and are tightly meshed. DVGW standard W describes a method for the assessment of enhancement of microbial growth on non-metallic materials in contact with drinking water. Gas and Energy Transition Integrated Energy.

Our subsidiaries do not just focus on sales activities but also on service, repair and spare parts supply Search Contact Heiko Delong Tel.: The services are tailor-made to meet the requirements of the industry and to ensure efficient meshing of the various processes. The main objective of all certification work is to ensure that there are no safety, hygiene or environmental objections to the products and companies certified.

Drinking Water –

Safety and Security Technical Safety Gas. This list must include the chemical name of the chemical compound, including the CAS-No. Water treatment Water transmission Water distribution network House connection Dams and hydropower Irrigation Fire protection network Industrial water applications Sewage and treatment.

Imprint Terms Print Sitemap. Information and Know-How Transfer. The test starts with the full disclosure of the recipe. This website uses cookies. As a major manufacturer of valves we are present all over the world. The recipe means the detailed chemical composition of the material from which the product is made.

Efficient Use of Gas.