DVGW certification of products in contact with drinking water Dipl.-Ing. Anton Wohlgemuth DVGW CERT GmbH, Bonn

DVGW certification of products in contact with drinking water Structure  What does "certification“ mean?  What are the benefits?  Testing requirements for valves in water supply  Examinations  Certification by DVGW CERT GmbH  External monitoring  Quality Assurance  Conclusion

DVGW certification of products in contact with drinking water  What does "certification“ mean?  What are the benefits?  Testing requirements for valves in water supply  Examinations  Certification by DVGW CERT GmbH  External monitoring  Quality Assurance  Conclusion

DVGW certification of products in contact with drinking water What does "certification“ mean? Certification is a conformity assessment by an recognized impartial third body (= certification body)  The certification body itselfs needs for their work an accreditation ( e.g. according to DIN EN 45011)  By an initial type examination from a recognized testing laboratory shall be verified that the product meets all the requirements of the specific testing standards. Monitoring of the manufacturing of the product in the market phase

DVGW certification of products in contact with drinking water  Accreditation certificate of DVGW CERT GmbH DAR-Reg.-No.: DAT-ZE-009/96-02

DVGW certification of products in contact with drinking water  What does "certification“ mean?  What are the benefits?  Testing requirements for valves in water supply  Examinations  Certification by DVGW CERT GmbH  External monitoring  Quality Assurance  Conclusion

DVGW certification of products in contact with drinking water What are the benefits? The certification mark offers the following benefits: Manufacturers who use globally recognized standards for conformity assessment, set standards for service quality Openness and transparency increased confidence in dealing with audit and control = Market acceptance mechanisms

DVGW certification of products in contact with drinking water What are the benefits? The DVGW certification marks:  documented a high safety, quality and hygiene standards  show a constant correlation between the rule-setting (requirement) and examination  demonstrate competence through 70 years experience in the field of certification  documented the highest national, European and international recognition

DVGW certification of products in contact with drinking water  What does "certification“ mean?  What are the benefits?  Testing requirements for valves in water use supply  Examinations  Certification by DVGW CERT GmbH  External monitoring  Quality Assurance  Conclusion

DVGW certification of products in contact with drinking water Testing requirements for valves in water supply DVGW testing standards always include the three aspects: Hygiene, safety and usability 1.Hygiene requirements - metallic materials according to DIN non-metallic materials: according to UBA/KTW and DVGW W Technical requirements: - DVGW standards (e.g. DVGW VP 546) - DIN-, EN-standards (e.g. DIN EN and DIN EN )

DVGW certification of products in contact with drinking water Testing requirements for valves in water supply 1.Hygiene requirements : Componets which are intended to come into contact with drinking water, should not change the quality of the drinking water. This means for metallic materials: The requirements of the material composition of DIN are fullfilled. This is achieved by an test certificate according to DIN EN Metal analysis demonstrated at each batch.

DVGW certification of products in contact with drinking water Testing requirements for valves in water supply 1.Hygiene requirements : For non-metallic materials : - all plastic parts, coatings and lubricants need a test certificate according to the specific UBA – Guideline. - for rubber producs (e.g. sealings) a test certificate according to KTW- Recommendation is necessary - and additionally a test certificate according to DVGW standard W 270 is necessary for all organic components

DVGW certification of products in contact with drinking water Testing requirements for valves in water supply 1.Hygiene requirements : DVGW standard W 270 : Edition November 2007 “Microbiological enhancement on materials to come into contact with drinking water” Investigation on fouling after 1, 2 or 3 months of exposure in (slowly) running water

DVGW certification of products in contact with drinking water Testing requirements for valves in water supply 1.Hygiene requirements : Example of a biofilm on a rubber hose

DVGW certification of products in contact with drinking water Examination according to DVGW standard W 270 (sheets):

DVGW certification of products in contact with drinking water Assessment according to DVGW standard W 270 („harvest “)

DVGW certification of products in contact with drinking water Assessment according to DVGW standard W 270 Positive rating:  (0,05 + 0,02) ml / 800 cm² (Class A – C) Positive rating :  (0,12 + 0,03) ml / 800 cm² (Class D 1) Positive rating :  (0,20 + 0,03) ml / 800 cm² (Class D 2)

DVGW certification of products in contact with drinking water Assessment according to DVGW standard W 270 Graph show the result from a test of a sealing material application class: D 1

DVGW certification of products in contact with drinking water Testing requirements for valves in water supply 2. Technical requirements: - DVGW VP 646 (Edition Oktober 2005) „Isolating valves, check valves, air valves and control valves made of metallic materials for drinking water destribution systems – requirements and tests”

DVGW certification of products in contact with drinking water Testing requirements for valves in water supply 2. Technical requirements: - DVGW W 336 (Edition June 2004) „Tapping valves for drinking water - requirements and tests“

DVGW certification of products in contact with drinking water Testing requirements for valves in water supply 2. Technical requirements: - DVGW VP 325 (Edition January 2008) „ Hydrants for water supply – requirements and tests“

DVGW certification of products in contact with drinking water Testing requirements for valves in water supply 2. Technical requirements: - DVGW VP 647 (Edition June 2007) „ Isolating valves made of polyethylene (PE 80 and PE 100) for drinking water distribution systems - requirements and tests“

DVGW certification of products in contact with drinking water Testing requirements for valves in water supply 2. Technical requirements: - DVGW VP (Edition August 2001) „ Noncrosslinked polyethylene surface boxes for gas- and drinking water supply; - requirements and tests -“ - DVGW VP (Edition December 2003) „Surface boxes made of thermoplastics materials with additives for gas- and drinking water supply: - requirements and tests -“ - DIN 3580 (Edition February 1992) „Surface boxes and ground plates; requirements and testing; DVGW code of practice”

DVGW certification of products in contact with drinking water Testing requirements for valves in water supply 2. Technical requirements: Example: Stop valves according to DVGW VP 646 Basic: DIN EN 1074 “Valves for water supply - Fitness for purpose requirements and appropriate verification tests “ Part 1: General requirements (Edition July 2000) Part 2: Isolating valves (Edition July 2004)

DVGW certification of products in contact with drinking water  What does "certification“ mean?  What are the benefits?  Testing requirements for valves in water supply  Examinations  Certification by DVGW CERT GmbH  External monitoring  Quality Assurance  Conclusion

DVGW certification of products in contact with drinking water Examinations DIN EN : Section 4: Design requirements 4.1 Materials 4.2 DN 4.3 Pressure 4.4 Temperatures 4.5 Construction of the pressurized body and the connection body 4.6 Type of connections and changeabillity of components

DVGW certification of products in contact with drinking water Examinations Fortsetzung: DIN EN : Section 4: Design requirements 4.7 Actuation direction 4.8 Highest water flow velocity 4.9 Materials incl. lubricants in contact with drinking water 4.10 Resistance to inside corrosion and against aging 4.11 Resistance against outside corrosion and aging

DVGW certification of products in contact with drinking water Examinations DIN EN : Section 5: Performance requirements 5.1 Mechanical strength Strength of the valve body and all pressurized parts Strength of the connector body against differential pressure Flexural strength of the valve Strength of the valve against actuation forces 5.2 Leak-tightness Tightness of the valve body and all pressurized parts against int. pressure Tightness of the connector Highest actuation moments (MOT) for d. activity and the tightness Tightness of the transmissions against external pressure

DVGW certification of products in contact with drinking water Examinations Continued: DIN EN : Section 5: Performance requirements 5.3 Hydraulic characteristics 5.4 Resistance to disinfection products 5.5 Endurance The mentioned Subsections in DIN EN 1074 Part 1 correspond to the subsections of DIN EN Part 2 here additionally, various test methods are described.

DVGW certification of products in contact with drinking water Examinations Leak-tightness against external pressure (according to ) Valves must be tight against the ingress of air, water and foreign substances of any kind, pressure change during testing may be 0.02 bar or less.

DVGW certification of products in contact with drinking water Examinations Leak-tightness against external pressure (according to )

DVGW certification of products in contact with drinking water Examinations Sub-plot of the pressure test

DVGW certification of products in contact with drinking water Examinations Leak testing (according to section )

DVGW certification of products in contact with drinking water Examinations Details of leak testing (according to section ) Picture shows a test which not met the requirements

DVGW certification of products in contact with drinking water Examinations Endurance test (according to section 5.5)

DVGW certification of products in contact with drinking water  What does "certification“ mean?  What are the benefits?  Testing requirements for valves in water supply  Examinations  Certification by DVGW CERT GmbH  External monitoring  Quality Assurance  Conclusion

DVGW certification of products in contact with drinking water Certification by DVGW CERT GmbH

DVGW certification of products in contact with drinking water Certification by DVGW CERT GmbH Online-register of all certified products

DVGW certification of products in contact with drinking water Certification by DVGW CERT GmbH „List of certification water“: A printed version of all DVGW certification, encluded a CD-ROM, Selled by:

DVGW certification of products in contact with drinking water  What does "certification“ mean?  What are the benefits?  Testing requirements for valves in water supply  Examinations  Certification by DVGW CERT GmbH  External monitoring  Quality Assurance  Conclusion

DVGW certification of products in contact with drinking water External monitoring  The manufacturer will be checked whether the requirements of testing are met.  Implementation by an auditor of the testing laboratory  Review of manufacturers self-monitoring Documentation in a control test report  Monitoring interval varies depending on relevant testing standard (e.g. DVGW VP 646 every two years on site at the manufacturer)

DVGW certification of products in contact with drinking water External monitoring Extent on the example of the DVGW VP 646: - Review of self-monitoring - Drawing test on the basis of documents from the initial type test - Review of label - Review of a sample on a nominal basis from the series in accordance with DIN EN , -3; -4 or -5, Section 5.5 (rolling removal of sizes by external supervision) - Review of all plant and inspection certificates (materials test certificate DIN EN 10204) under the traceability of the components - Checking the validity of the hygienie test certificates

DVGW certification of products in contact with drinking water  What does "certification“ mean?  What are the benefits?  Testing requirements for valves in water supply  Examinations  Certification by DVGW CERT GmbH  External monitoring  Quality Assurance  Conclusion

DVGW certification of products in contact with drinking water Quality assurance Requirements of DIN EN : "The manufacturer has to monitor the quality of its products during their Manufacturing within a production control system, so that the manufactured Products fullfil the use suitability requirements of this standard. The quality system of the manufacturer have to comply with the requirements of DIN EN ISO In addition, it is recommended that the quality management recognized by a competent independent certification agency. "

DVGW certification of products in contact with drinking water Quality assurance Additionally ask Section 5 "self-monitoring" of the DVGW VP 646: "As part of the self-monitoring the manufacturer has to ensure that during manufacturing the requirements of this test standard are met. The results of the self-monitoring, in according to the manufacturer's inspection to be documented. In context of manufacturers quality system they need to have to document the frequency and the scope of its self-monitoring. The DIN EN Annex A.3 "tightness of the pressure housing, testing P11" requires a 100% testing of each valve to implement. "

DVGW certification of products in contact with drinking water  What does "certification“ mean?  What are the benefits?  Testing requirements for valves in water supply  Examinations  Certification by DVGW CERT GmbH  External monitoring  Quality Assurance  Conclusion

DVGW certification of products in contact with drinking water Conclusion Up to now there is no possibility to use European directives for the certification of products in contact with drinking water. There remains the DVGW- and the DIN-DVGW certification according to the DVGW Regulations an evidence of the recognized rules of technology. The products certified and monitored are in conformity with the national statutory rules and regulations, the requirements of DIN standards and the DVGW Standards and Codes of Practice as well as common market practice. This means they have the required safety, fitness for use, functionality, quality, hygiene and environmental compatibillity.

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