Dvgw certification of products in contact with drinking water
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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

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Dvgw certification of products in contact with drinking water

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 water1

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 water2

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 water3

DVGW certification of products in contact with drinking water

What does "certification“ mean?

  • Certification is a conformity assessment by an recognizedimpartialthirdbody (= certificationbody)

  • The certificationbodyitselfsneedsfortheirwork an accreditation ( e.g. accordingto 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 water4

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 water5

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 water6

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

Opennessandtransparencyincreasedconfidence

in dealing with audit and control = Market acceptance

mechanisms


Dvgw certification of products in contact with drinking water7

DVGW certification of products in contact with drinking water

What are the benefits?

The DVGW certificationmarks:

  • 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 water8

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 water9

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

  • Hygiene requirements

    - metallic materialsaccordingtoDIN 50930-6

    - non-metallic materials: accordingtoUBA/KTW and DVGW W 270

  • Technical requirements:

    - DVGW standards (e.g. DVGW VP 546)

    - DIN-, EN-standards (e.g. DIN EN 1074-1 and DIN EN 1074-2)


Dvgw certification of products in contact with drinking water10

DVGW certification of products in contact with drinking water

Testing requirements for valves in water supply

  • 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 50930-6 are fullfilled.

    This is achieved by an test certificate according to DIN EN 10204-3.1       Metal analysis demonstrated at each batch.


Dvgw certification of products in contact with drinking water11

DVGW certification of products in contact with drinking water

Testing requirements for valves in water supply

  • 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 1.3.13 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 water12

DVGW certification of products in contact with drinking water

Testing requirements for valves in water supply

  • 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 water13

DVGW certification of products in contact with drinking water

Testing requirements for valves in water supply

  • Hygiene requirements :

    Example of a biofilm on a rubber hose


Dvgw certification of products in contact with drinking water14

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 water15

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 water16

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 water17

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 water18

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 water19

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 water20

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)

„Hydrantsfor water supply – requirements and tests“


Dvgw certification of products in contact with drinking water21

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 water22

DVGW certification of products in contact with drinking water

Testing requirements for valves in water supply

2. Technical requirements:

- DVGW VP 310-1 (Edition August 2001)

„ Noncrosslinked polyethylene surface boxes for gas- and drinking water supply;

- requirements and tests -“

- DVGW VP 310-2(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 water23

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 water24

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 water25

DVGW certification of products in contact with drinking water

Examinations

DIN EN 1074-1:

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 water26

DVGW certification of products in contact with drinking water

Examinations

Fortsetzung:

DIN EN 1074-1:

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 water27

DVGW certification of products in contact with drinking water

Examinations

DIN EN 1074-1:

Section 5: Performance requirements

5.1 Mechanical strength

5.1.1 Strength of the valve body and all pressurized parts

5.1.2 Strength of the connector body against differential pressure

5.1.3 Flexural strength of the valve

5.1.4 Strength of the valve against actuation forces

5.2 Leak-tightness

5.2.1 Tightness of the valve body and all pressurized parts against int. pressure

5.2.2 Tightness of the connector

5.2.3 Highest actuation moments (MOT) for d. activity and the tightness

5.2.4 Tightness of the transmissions against external pressure


Dvgw certification of products in contact with drinking water28

DVGW certification of products in contact with drinking water

Examinations

Continued:

DIN EN 1074-1:

Section 5: Performance requirements

5.3 Hydrauliccharacteristics

5.4 Resistance todisinfectionproducts

5.5 Endurance

The mentioned Subsections in DIN EN 1074 Part 1 correspond to the

subsections of DIN EN 1074 - Part 2 here additionally, various test

methods are described.


Dvgw certification of products in contact with drinking water29

DVGW certification of products in contact with drinking water

Examinations

Leak-tightnessagainstexternalpressure (accordingto 5.2.1.2)

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 water30

DVGW certification of products in contact with drinking water

Examinations

Leak-tightness against external pressure (according to 5.2.1.2)


Dvgw certification of products in contact with drinking water31

DVGW certification of products in contact with drinking water

Examinations

Sub-plot of the pressure test


Dvgw certification of products in contact with drinking water32

DVGW certification of products in contact with drinking water

Examinations

Leak testing (according to section 5.2.2.1)


Dvgw certification of products in contact with drinking water33

DVGW certification of products in contact with drinking water

Examinations

Details ofleaktesting (accordingtosection 5.2.2.1)

Picture shows a test which not met the requirements


Dvgw certification of products in contact with drinking water34

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 water35

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


Dvgw certification of products in contact with drinking water certification by dvgw cert gmbh1

DVGW certification of products in contact with drinking waterCertification by DVGW CERT GmbH

www.dvgw-cert.com Online-register of all certified products


Dvgw certification of products in contact with drinking water certification by dvgw cert gmbh2

DVGW certification of products in contact with drinking waterCertification by DVGW CERT GmbH

„List of certification water“: A printed version of all DVGW certification, encluded a CD-ROM, Selled by: www.wvgw.de


Dvgw certification of products in contact with drinking water36

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 water37

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 ofmanufacturersself-monitoring

    Documentation in a controltestreport

  • 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 water38

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 1074-2, -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 water39

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 water40

DVGW certification of products in contact with drinking water

Quality assurance

Requirementsof DIN EN 1074-1:

"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 9002. In addition, it is recommended that the quality management

recognized by a competent independent certification agency. "


Dvgw certification of products in contact with drinking water41

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 12266-1 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 water42

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 water43

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.


Dvgw certification of products in contact with drinking water44

DVGW certification of products in contact with drinking water

Do you have any question?


Dvgw certification of products in contact with drinking water45

DVGW certification of products in contact with drinking water

!!! Thank you

for your attention!!


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