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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
Dipl.-Ing. Anton Wohlgemuth
DVGW CERT GmbH, Bonn
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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
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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
www.dvgw.de
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
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DVGW certification of products in contact with drinking water
Accreditation certificate of
DVGW CERT GmbH
DAR-Reg.-No.:
DAT-ZE-009/96-02
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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
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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
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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
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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
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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 50930-6
- non-metallic materials: according to UBA/KTW and DVGW W 270
2. Technical requirements: - DVGW standards (e.g. DVGW VP 546)
- DIN-, EN-standards (e.g. DIN EN 1074-1 and DIN EN 1074-2)
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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 50930-6 are fullfilled.
This is achieved by an test certificate according to DIN EN 10204-3.1 Metal analysis demonstrated at each batch.
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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 1.3.13 is necessary
- and additionally a test certificate according to DVGW standard W 270 is necessary for all organic components
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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
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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
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DVGW certification of products in contact with drinking water
Examination according to DVGW standard W 270 (sheets):
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DVGW certification of products in contact with drinking water
Assessment according to DVGW standard W 270 („harvest “)
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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)
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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
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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”
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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“
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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“
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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“
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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”
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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)
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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
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DVGW certification of products in contact with drinking water
Examinations
DIN EN 1074-1:Section 4: Design requirements
4.1 Materials4.2 DN4.3 Pressure4.4 Temperatures4.5 Construction of the pressurized body and the connection body4.6 Type of connections and changeabillity of components
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DVGW certification of products in contact with drinking water
Examinations
Fortsetzung:DIN EN 1074-1:Section 4: Design requirements
4.7 Actuation direction4.8 Highest water flow velocity4.9 Materials incl. lubricants in contact with drinking water4.10 Resistance to inside corrosion and against aging4.11 Resistance against outside corrosion and aging
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DVGW certification of products in contact with drinking water
ExaminationsDIN EN 1074-1:Section 5: Performance requirements
5.1 Mechanical strength5.1.1 Strength of the valve body and all pressurized parts5.1.2 Strength of the connector body against differential pressure5.1.3 Flexural strength of the valve5.1.4 Strength of the valve against actuation forces
5.2 Leak-tightness5.2.1 Tightness of the valve body and all pressurized parts against int. pressure5.2.2 Tightness of the connector5.2.3 Highest actuation moments (MOT) for d. activity and the tightness5.2.4 Tightness of the transmissions against external pressure
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DVGW certification of products in contact with drinking water
ExaminationsContinued:DIN EN 1074-1:Section 5: Performance requirements
5.3 Hydraulic characteristics5.4 Resistance to disinfection products5.5 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.
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DVGW certification of products in contact with drinking water
Examinations
Leak-tightness against external pressure (according to 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.
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DVGW certification of products in contact with drinking water
Examinations
Leak-tightness against external pressure (according to 5.2.1.2)
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DVGW certification of products in contact with drinking water
Examinations
Sub-plot of the pressure test
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DVGW certification of products in contact with drinking water
Examinations
Leak testing (according to section 5.2.2.1)
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DVGW certification of products in contact with drinking water
Examinations
Details of leak testing (according to section 5.2.2.1)Picture shows a test which not met the requirements
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DVGW certification of products in contact with drinking water
Examinations
Endurance test (according to section 5.5)
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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
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DVGW certification of products in contact with drinking water Certification by DVGW CERT GmbH
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DVGW certification of products in contact with drinking water Certification by DVGW CERT GmbH
www.dvgw-cert.com Online-register of all certified products
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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: www.wvgw.de
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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
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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)
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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
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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
www.dvgw.de
DVGW certification of products in contact with drinking water
Quality assurance
Requirements of 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. "
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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. "
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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
www.dvgw.de
DVGW certification of products in contact with drinking water
Conclusion
Up to now there is no possibility to use European directives for the certification ofproducts in contact with drinking water. There remains the DVGW- and the DIN-DVGW certification according to theDVGW 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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DVGW certification of products in contact with drinking water
Do you have any question?
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DVGW certification of products in contact with drinking water
!!! Thank you
for your attention!!
