This document specifies an analysing methodology for protecting potable water in potable water installations within and outside buildings but within premises from the risk of pollution by backflow of non-potable water and gives recommendations on the design, risk analysis, backflow prevention devices and their installation methods (see Figure 1 and Figure 2).
This methodology is also intended to be used outside premises for all water systems connected to a potable water distribution system up to and including the point of use (see Figure 3).
The product standards for the specific backflow prevention devices or arrangements are intended to be used in conjunction with this document. For the development of new devices or systems, this document is intended to be used as a reference to establish the necessary level of backflow protection.

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This document specifies an analysing methodology for protecting potable water in potable water installations within and outside buildings but within premises from the risk of pollution by backflow of non-potable water and gives recommendations on the design, risk analysis, backflow prevention devices and their installation methods (see Figure 1 and Figure 2).
This methodology is also intended to be used outside premises for all water systems connected to a potable water distribution system up to and including the point of use (see Figure 3).
The product standards for the specific backflow prevention devices or arrangements are intended to be used in conjunction with this document. For the development of new devices or systems, this document is intended to be used as a reference to establish the necessary level of backflow protection.

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This document specifies design principles and performance requirements for sludge treatment and storage facilities at wastewater treatment plants serving more than 50 PT.
Guidance on operation is provided where it is necessary in order to facilitate the design of control and automation and design access to points of operation.
NOTE   Other sludges and organic wastes can be treated together with municipal sewage sludge where national and local regulations permit.

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This document specifies design principles and performance requirements for sludge treatment and storage facilities at wastewater treatment plants serving more than 50 PT.
Guidance on operation is provided where it is necessary in order to facilitate the design of control and automation and design access to points of operation.
NOTE   Other sludges and organic wastes can be treated together with municipal sewage sludge where national and local regulations permit.

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This document is applicable to lagoons and specifies the performance requirements for the installation of lagooning processes.
This document applies to wastewater lagooning processes treating municipal wastewater from combined or separate sewage systems and when used as a tertiary treatment.
NOTE   Lagoon systems are especially suitable for the treatment of wastewater where large flow variations occur (e.g. arising from surface water connections in the collection system). They are also especially suitable where large load variations occur (e.g. arising from fluctuating seasonal or industrial flows).

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This document is applicable to lagoons and specifies the performance requirements for the installation of lagooning processes.
This document applies to wastewater lagooning processes treating municipal wastewater from combined or separate sewage systems and when used as a tertiary treatment.
NOTE   Lagoon systems are especially suitable for the treatment of wastewater where large flow variations occur (e.g. arising from surface water connections in the collection system). They are also especially suitable where large load variations occur (e.g. arising from fluctuating seasonal or industrial flows).

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This document specifies design principles and performance requirements for odour control and associated ventilation for wastewater treatment plants serving more than 50PT.

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This document specifies design principles and performance requirements for odour control and associated ventilation for wastewater treatment plants serving more than 50PT.

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This document specifies performance requirements for treatment of wastewater using the activated sludge process for plants over 50 PT.
The informative Annexes A to W provide design information.

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This document specifies performance requirements for treatment of wastewater using the activated sludge process for plants over 50 PT.
The informative Annexes A to W provide design information.

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This document specifies the design requirements for plant and equipment to remove solids, other than screenings and grit, from raw wastewater, at wastewater treatment plants for over 50 PT.
It includes primary treatment with sedimentation, fine screens and micro-screens.
NOTE 1   The removal of screenings and grit is covered in EN 12255-3.
NOTE 2   Dissolved air flotation (DAF) is not covered in detail in this document because it is not commonly used for primary treatment in municipal wastewater treatment plants. It can be used for primary treatment of industrial wastewater, but then the design is specific to the application.

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This document specifies data which is necessary for the planning, design, bidding, performance guarantees, construction, start-up and compliance testing of a wastewater treatment plant or parts of it. This document gives fundamental information about the practices; this document has not attempted to specify all available practices.

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This document specifies the design requirements for plant and equipment to remove solids, other than screenings and grit, from raw wastewater, at wastewater treatment plants for over 50 PT.
It includes primary treatment with sedimentation, fine screens and micro-screens.
NOTE 1   The removal of screenings and grit is covered in EN 12255-3.
NOTE 2   Dissolved air flotation (DAF) is not covered in detail in this document because it is not commonly used for primary treatment in municipal wastewater treatment plants. It can be used for primary treatment of industrial wastewater, but then the design is specific to the application.

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This document specifies data which is necessary for the planning, design, bidding, performance guarantees, construction, start-up and compliance testing of a wastewater treatment plant or parts of it. This document gives fundamental information about the practices; this document has not attempted to specify all available practices.

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This document is applicable to the trenchless construction, trenchless replacement techniques and testing of new drains and new sewers in the ground and usually operating as gravity or pressure pipelines, formed using prefabricated pipes and their joints.
Renovation techniques for existing pressure and non-pressure systems are not covered by this document.
Methods of trenchless construction include:
- manned and unmanned techniques;
- steerable and non-steerable techniques.
NOTE 1 Mining or tunnelling techniques for permanent structures (e.g. in situ construction or the use of prefabricated segments) are not covered by this document although some parts can apply to these methods.
NOTE 2 Trenchless insertion using a pipe plough system is a common method for installing small pipes and cables. The method does not exactly cope with the scope of this document. Therefore, it is described in the informative Annex D.
Requirements for associated pipeline installation work other than trenchless construction, e.g. for manholes and inspection chambers, are not covered by this document and are specified in EN 1610. This also applies to pipes that are subsequently installed within entry and exit shafts/pits.

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This document is applicable to the trenchless construction, trenchless replacement techniques and testing of new drains and new sewers in the ground and usually operating as gravity or pressure pipelines, formed using prefabricated pipes and their joints.
Renovation techniques for existing pressure and non-pressure systems are not covered by this document.
Methods of trenchless construction include:
- manned and unmanned techniques;
- steerable and non-steerable techniques.
NOTE 1 Mining or tunnelling techniques for permanent structures (e.g. in situ construction or the use of prefabricated segments) are not covered by this document although some parts can apply to these methods.
NOTE 2 Trenchless insertion using a pipe plough system is a common method for installing small pipes and cables. The method does not exactly cope with the scope of this document. Therefore, it is described in the informative Annex D.
Requirements for associated pipeline installation work other than trenchless construction, e.g. for manholes and inspection chambers, are not covered by this document and are specified in EN 1610. This also applies to pipes that are subsequently installed within entry and exit shafts/pits.

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This document specifies the endurance test necessary to confirm the ability of hand-operated plastics valves to withstand prolonged use, with repeated opening and closure. It does not specify the ability of valves to withstand adverse conditions, in particular those of chemically aggressive fluid media and/or environments, or excessive fluid velocities and cavitation.
NOTE    Concerning the chemical aggression of the materials, a classification table is reported in ISO/TR 10358[1].
This document includes values of the parameters necessary for the proper performance of the endurance test, with the reservation that the parameters are different in particular product standards (see 5.1).

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This document specifies the endurance test necessary to confirm the ability of hand-operated plastics valves to withstand prolonged use, with repeated opening and closure. It does not specify the ability of valves to withstand adverse conditions, in particular those of chemically aggressive fluid media and/or environments, or excessive fluid velocities and cavitation.
NOTE    Concerning the chemical aggression of the materials, a classification table is reported in ISO/TR 10358[1].
This document includes values of the parameters necessary for the proper performance of the endurance test, with the reservation that the parameters are different in particular product standards (see 5.1).

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This standard specifies the requirements for the structural design of water supply pipelines, drains and sewers, and other water industry pipelines, whether operating under atmospheric, greater of lesser pressure. In addition, this standard   gives guidance on the application of the established methods of design used in CEN member countries at the time of preparation of the standard. - The Decision was decided for Annex B only. -

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This standard specifies the requirements for the structural design of water supply pipelines, drains and sewers, and other water industry pipelines, whether operating under atmospheric, greater of lesser pressure. In addition, this standard   gives guidance on the application of the established methods of design used in CEN member countries at the time of preparation of the standard. - The Decision was decided for Annex B only. -

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ISO 9969:2016 specifies a test method for determining the ring stiffness of thermoplastics pipes having a circular cross section.

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ISO 9967:2016 specifies a method for determining the creep ratio of thermoplastics pipes having a circular cross-section.

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ISO 9969:2016 specifies a test method for determining the ring stiffness of thermoplastics pipes having a circular cross section.

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ISO 9967:2016 specifies a method for determining the creep ratio of thermoplastics pipes having a circular cross-section.

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The ISO 6259 series specifies a method of determining the tensile properties of thermoplastics pipes, including the following properties: stress at yield, and elongation at break.
ISO 6259-1:2015 is applicable to all types of thermoplastics pipe, regardless of their intended use.

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ISO 3458:2015 specifies the method of test for checking the leak tightness of assembled joints between mechanical fittings and plastic pressure pipes. The test applies regardless of the design and material of the fitting used for jointing plastic pipe.

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ISO 3503:2015 specifies a method for checking the leak tightness under internal pressure of assembled joints between mechanical fittings and plastic pressure pipes when subjected to bending. It defines the calculation method for the average bending radius and how to perform this bending.
Checking of the leak tightness under internal pressure is carried out in accordance with the method given in ISO 3458.
This test method is not applicable to fusion-welded joints.

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The ISO 6259 series specifies a method of determining the tensile properties of thermoplastics pipes, including the following properties: stress at yield, and elongation at break.
ISO 6259-1:2015 is applicable to all types of thermoplastics pipe, regardless of their intended use.

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ISO 3458:2015 specifies the method of test for checking the leak tightness of assembled joints between mechanical fittings and plastic pressure pipes. The test applies regardless of the design and material of the fitting used for jointing plastic pipe.

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ISO 3503:2015 specifies a method for checking the leak tightness under internal pressure of assembled joints between mechanical fittings and plastic pressure pipes when subjected to bending. It defines the calculation method for the average bending radius and how to perform this bending.
Checking of the leak tightness under internal pressure is carried out in accordance with the method given in ISO 3458.
This test method is not applicable to fusion-welded joints.

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ISO 9080:2012 specifies a method for predicting the long-term hydrostatic strength of thermoplastics materials by statistical extrapolation. The method is applicable to all types of thermoplastics pipe at applicable temperatures. It was developed on the basis of test data from pipe systems.

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ISO 9080:2012 specifies a method for predicting the long-term hydrostatic strength of thermoplastics materials by statistical extrapolation. The method is applicable to all types of thermoplastics pipe at applicable temperatures. It was developed on the basis of test data from pipe systems.

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This European Standard specifies the requirements, sampling, test methods and conditions of delivery for seamless round copper tubes.
It is applicable to tubes having an outside diameter from 6 mm up to and including 267 mm for:
-   distributing networks for hot water and cold water;
-   hot water heating systems, including panel heating systems (under-floor, wall, overhead);
-   domestic gas and liquid fuel distribution;
-   waste water sanitation.
It is also applicable to seamless round copper tubes intended to be pre insulated before use for any of the above purposes.

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This European Standard specifies the requirements, sampling, test methods and conditions of delivery for seamless round copper tubes.
It is applicable to tubes having an outside diameter from 6 mm up to and including 267 mm for:
-   distributing networks for hot water and cold water;
-   hot water heating systems, including panel heating systems (under-floor, wall, overhead);
-   domestic gas and liquid fuel distribution;
-   waste water sanitation.
It is also applicable to seamless round copper tubes intended to be pre insulated before use for any of the above purposes.

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ISO 13968:2008 specifies a method for testing the ring flexibility of a thermoplastics pipe having a circular cross-section.
The method enables determination of the deflection, and necessary force, at which physical damage, if any, occurs within the specified diametric deflection.

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ISO 13968:2008 specifies a method for testing the ring flexibility of a thermoplastics pipe having a circular cross-section.
The method enables determination of the deflection, and necessary force, at which physical damage, if any, occurs within the specified diametric deflection.

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ISO 1167-3:2007 specifies the procedure for the preparation of components, i.e. fittings and valve bodies, for the determination of their resistance to internal hydrostatic pressure according to ISO 1167-1.

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ISO 1167-3:2007 specifies the procedure for the preparation of components, i.e. fittings and valve bodies, for the determination of their resistance to internal hydrostatic pressure according to ISO 1167-1.

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This European Standard gives the definition of PN when applied to components of a pipework system, as specified in those standards which use the PN designation system.
This standard specifies the PN numbers which are used.

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This European Standard gives the definition of PN when applied to components of a pipework system, as specified in those standards which use the PN designation system.
This standard specifies the PN numbers which are used.

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ISO 1167-2:2006 specifies the dimensions and method for preparation of extruded or injection-moulded tubular test pieces, used to determine the resistance of thermoplastics pipes to internal hydrostatic pressure according to ISO 1167-1.

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ISO 1167-1:2006 specifies a general test method for determining the resistance to internal hydrostatic pressure at a given temperature of thermoplastics pipes, fittings and piping systems for the transport of fluids. The method accommodates water-in-water, water-in-air and water-in-liquid tests.

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ISO 1167-1:2006 specifies a general test method for determining the resistance to internal hydrostatic pressure at a given temperature of thermoplastics pipes, fittings and piping systems for the transport of fluids. The method accommodates water-in-water, water-in-air and water-in-liquid tests.

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ISO 1167-2:2006 specifies the dimensions and method for preparation of extruded or injection-moulded tubular test pieces, used to determine the resistance of thermoplastics pipes to internal hydrostatic pressure according to ISO 1167-1.

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ISO 7686:2005 specifies a method for the determination of the opacity of plastics pipes and fittings.

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In addition to EN 1295-1, this Technical Report gives additional guidance when compared with EN 1295-1 on the application of the nationally established methods of design declared by and used in CEN member countries at the time of preparation of this document (see informative Annex A).
This Technical Report is an important source of design expertise, but it cannot include all possible special cases, in which extensions or restrictions to the basic design methods may apply.
Since in practice precise details of types of soil and installation conditions are not always available at the design stage, the choice of design assumptions is left to the judgement of the engineer. In this connection the document can only provide general indications and advice.

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This document gives recommendations, and specifies requirements, on the design of potable water installations within buildings and for pipework outside buildings but within the premises (see EN 806-1) and applies to new installations, alterations and repairs.

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ISO 7686:2005 specifies a method for the determination of the opacity of plastics pipes and fittings.

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