Copper and copper alloys - Plumbing fittings - Part 6: Push-fit fittings for use with metallic tubes, plastics and multilayer pipes

This document specifies product characteristics, assessment methods, compliance criteria and a designation system for push-fit fittings for the purpose of joining tubes of copper, plated copper, multilayer pipes and plastics pipes. The fitting ends have a size range from 6 mm to 54 mm. The fittings are designed for a service lifetime up to fifty years.
This document is applicable to push-fit fittings for joining one or more of the following tubes or pipes:
-   copper tubes to EN 1057; copper composite according to UNI 11342, plastic and multilayer pipes covered by EN 15015.
The fittings are used up to the operating temperatures and maximum operating pressures as indicated in Annex A.
This document applies to copper alloy fittings. A non-exhaustive list of these copper alloys is given in CEN/TS 13388.
Adaptor fittings may combine push-fit ends with fitting ends defined in the other parts of EN 1254.
Push-fit fittings for metallic tubes may also have flanged end connections according to EN 1092-3.
Push-fit fittings may also have a plated or other decorative surface coating.
Fittings can be produced by machining, metal forming, casting, or fabrication.
Products covered by this standard are intended to be used in liquid applications:
-   hot, cold or combined hot and cold water systems according to EN 806;
-   closed heating systems according to EN 12828 and cooling systems;
-   drainage systems;
-   sprinkler systems according to EN 12845.

Kupfer und Kupferlegierungen - Fittings - Teil 6: Einsteckfittings für den Einsatz mit Metall-, Kunststoff- und Mehrschichtverbundrohren

Dieses Dokument legt Produkteigenschaften, Bewertungsverfahren, Konformitätskriterien und ein Bezeichnungssystem für Einsteckfittings zum Verbinden von Kupferrohren, Rohren aus galvanisch beschichtetem Kupfer, Kunststoff- und Mehrschichtverbundrohren fest. Die Fittingenden haben einen Größenbereich von 6 mm bis 54 mm. Die Fittings sind für eine Lebensdauer von bis zu fünfzig Jahren ausgelegt.
Dieses Dokument gilt für Einsteckfittings zum Verbinden eines oder mehrerer der folgenden Rohre:
-   Kupferrohre nach EN 1057; Kupferverbundwerkstoffe nach UNI 11342, Kunststoff- und Mehrschichtverbundrohre nach EN 15015.
Die Fittings werden bis zu den in Anhang A angegebenen Betriebstemperaturen und maximalen Betriebsdrücken eingesetzt.
Dieses Dokument gilt für Fittings aus Kupferlegierungen. Eine nicht vollständige Liste dieser Kupferlegierungen ist in CEN/TS 13388 enthalten.
Übergangsfittings dürfen Einsteckenden mit in den anderen Teilen der EN 1254 definierten Fittingenden kombinieren.
Einsteckfittings für Metallrohre dürfen auch Flanschendanschlüsse nach EN 1092-3 aufweisen.
Einsteckfittings dürfen auch galvanische oder andere dekorative Oberflächenüberzüge aufweisen.
Fittings können durch Bearbeiten, Metallumformen, Gießen oder Fertigen hergestellt werden.
Die unter diese Norm fallenden Produkte sind für den Einsatz in Flüssigkeitsanwendungen bestimmt:
-   Warm-, Kalt- oder kombinierte Warm-/Kaltwassersysteme nach EN 806;
-   geschlossene Heizsysteme nach EN 12828 und Kühlsysteme;
-   Entwässerungssysteme;
-   Sprinkleranlagen nach EN 12845.

Cuivre et alliages de cuivre - Raccords - Partie 6 : Raccords instantanés pour tubes métalliques, en matières plastiques et multicouches

Le présent document spécifie les caractéristiques de produit, les méthodes d'évaluation, les critères de conformité et un système de désignation pour les raccords instantanés pour l'assemblage de tubes en cuivre, en cuivre plaqué, de tubes multicouches et de tuyaux en plastique. Les extrémités de raccords ont une gamme de dimensions comprise entre 6 mm et 54 mm. Les raccords sont conçus pour une durée de vie en service supérieure à 50 ans.
Le présent document est applicable aux raccords instantanés permettant de raccorder un ou plusieurs tubes ou tuyaux des types suivants :
-   tubes en cuivre conformes à l’EN 1057 ; composite cuivre conformes à l’UNI 11342, tubes en plastiques et multicouches couverts par l’EN 15015.
Les raccords sont utilisés jusqu'aux températures de service et aux pressions de service maximales indiquées à l'Annexe A.
Le présent document s'applique aux raccords en alliage de cuivre. Une liste non exhaustive de ces alliages de cuivre figure dans la CEN/TS 13388.
Les raccords adaptateurs peuvent combiner des extrémités instantanées avec des extrémités de raccord définies dans les autres parties de l’EN 1254.
Les raccords instantanés pour tubes métalliques peuvent également comporter des raccordements à brides conformément à l’EN 1092-3.
Les raccords instantanés peuvent également avoir une surface plaquée ou un autre revêtement de surface décoratif.
Les raccords peuvent être fabriqués par usinage, formage des métaux, moulage ou mécanosoudage.
Les produits couverts par la présente norme sont destinés à être utilisés dans les applications liquides :
-   les systèmes d'eau chaude, d'eau froide ou d'eau chaude et d'eau froide combinées conformes à l’EN 806 ;
-   les systèmes de chauffage fermés conformes à l'EN 12828 et les systèmes de refroidissement ;
-   les systèmes de purge ;
-   les systèmes d'extinction de type sprinkleur conformes à l’EN 12845.

Baker in bakrove zlitine - Fitingi - 6. del: Fitingi s priključki "push-fit" za spajanje s kovinskimi, plastičnimi in večplastnimi cevmi

General Information

Status
Published
Public Enquiry End Date
04-Sep-2019
Publication Date
03-Jun-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
03-Jun-2021
Due Date
08-Aug-2021
Completion Date
04-Jun-2021

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SLOVENSKI STANDARD
SIST EN 1254-6:2021
01-julij-2021
Nadomešča:
SIST EN 1254-6:2014

Baker in bakrove zlitine - Fitingi - 6. del: Fitingi s priključki "push-fit" za spajanje s

kovinskimi, plastičnimi in večplastnimi cevmi

Copper and copper alloys - Plumbing fittings - Part 6: Push-fit fittings for use with metallic

tubes, plastics and multilayer pipes

Kupfer und Kupferlegierungen - Fittings - Teil 6: Einsteckfittings für den Einsatz mit

Metall-, Kunststoff- und Mehrschichtverbundrohren

Cuivre et alliages de cuivre - Raccords - Partie 6 : Raccords instantanés pour tubes

métalliques, en matières plastiques et multicouches
Ta slovenski standard je istoveten z: EN 1254-6:2021
ICS:
23.040.40 Kovinski fitingi Metal fittings
77.150.30 Bakreni izdelki Copper products
SIST EN 1254-6:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 1254-6:2021
---------------------- Page: 2 ----------------------
SIST EN 1254-6:2021
EN 1254-6
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2021
EUROPÄISCHE NORM
ICS 23.040.40 Supersedes EN 1254-6:2012
English Version
Copper and copper alloys - Plumbing fittings - Part 6:
Push-fit fittings for use with metallic tubes, plastics and
multilayer pipes

Cuivre et alliages de cuivre - Raccords - Partie 6 : Kupfer und Kupferlegierungen - Fittings - Teil 6:

Raccords instantanés pour tubes métalliques, en Einsteckfittings für den Einsatz mit Metall-, Kunststoff-

matières plastiques et multicouches und Mehrschichtverbundrohren
This European Standard was approved by CEN on 23 November 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1254-6:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 1254-6:2021
EN 1254-6:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 8

4 Product characteristics ................................................................................................................................. 8

4.1 Internal pressure ............................................................................................................................................ 8

4.2 Tightness ............................................................................................................................................................ 8

4.3 Resistance to high temperature (for heating networks) .................................................................. 9

4.4 Release of dangerous substances .............................................................................................................. 9

4.5 Durability ........................................................................................................................................................ 10

4.6 Wall thickness at threaded portions of adaptor fittings ................................................................ 10

4.7 Dimensions of tail pipe ends for swivel fittings ................................................................................ 10

4.8 Threaded end dimensions ........................................................................................................................ 11

4.9 Other adapter ends (not defined in EN 1254-20:2021) ................................................................. 11

4.10 Bore dimensions ........................................................................................................................................... 11

4.11 Identity of elastomeric sealing material .............................................................................................. 11

4.12 Tube / pipe abutment ................................................................................................................................. 11

4.13 Alignment of the fitting ends .................................................................................................................... 11

4.14 Shapes for tightening systems ................................................................................................................. 12

4.15 Surface condition ......................................................................................................................................... 12

4.16 Disconnection and re-use (for fittings capable of being disconnected) ................................... 12

4.17 Plated or coated surfaces .......................................................................................................................... 12

5 Testing, assessment and sampling methods ...................................................................................... 12

5.1 General ............................................................................................................................................................. 12

5.2 Internal hydrostatic pressure test ......................................................................................................... 12

5.3 Tightness ......................................................................................................................................................... 13

5.4 Durability ........................................................................................................................................................ 16

5.5 Wall thickness at threaded portions of adaptor fittings ................................................................ 17

5.6 Dimensions of tail pipe ends for swivel fittings ................................................................................ 18

5.7 Threaded end dimensions ........................................................................................................................ 18

5.8 Bore dimensions ........................................................................................................................................... 18

5.9 Identity of elastomeric sealing material for liquid applications ................................................ 18

5.10 Alignment of the fitting ends .................................................................................................................... 18

5.11 Disconnection and re-use (for fittings capable of being disconnected) ................................... 18

6 Evaluation of conformity ........................................................................................................................... 19

6.1 General ............................................................................................................................................................. 19

6.2 Type testing .................................................................................................................................................... 19

6.3 Test reports .................................................................................................................................................... 22

6.4 Factory production control (FPC) .......................................................................................................... 22

7 Designation..................................................................................................................................................... 25

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SIST EN 1254-6:2021
EN 1254-6:2021 (E)

8 Marking, labelling and packaging ........................................................................................................... 25

8.1 General ............................................................................................................................................................. 25

8.2 Dezincification resistant copper zinc alloys ....................................................................................... 25

Annex A (normative) Operating temperatures and design pressures ................................................... 26

Bibliography ................................................................................................................................................................. 28

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SIST EN 1254-6:2021
EN 1254-6:2021 (E)
European foreword

This document (EN 1254-6:2021) has been prepared by Technical Committee CEN/TC 133 “Copper and

copper alloys”, the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of

an identical text or by endorsement, at the latest by November 2021, and conflicting national

standards shall be withdrawn at the latest by November 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 1254-6:2012.
The main changes to EN 1254-6:2012 are:

— improved alignment with plastic and multilayer pipe standards for hot and cold water applicartions;

— separation of test methods into part 20.

This part of the standard (EN 1254-6) should be read in conjunction with EN 1254-20:2021.

EN 1254 comprises the following parts under the general title “Copper and copper alloys — Plumbing

fittings”:
— Part 1: Capillary fittings for soldering or brazing to copper tubes
— Part 2: Compression fittings for use with copper tubes
— Part 3: Compression fittings for use with plastics and multilayer pipes
— Part 4: Threaded fittings
— Part 5: Capillary fittings with short ends for brazing to copper tubes

— Part 6: Push-fit fittings for use with metallic tubes, plastics and multilayer pipes

— Part 7: Press fittings for use with metallic tubes
— Part 8: Press fittings for use with plastics and multilayer pipes

— Part 20: Definitions, thread dimensions, test methods, reference data and supporting information

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,

Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,

Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North

Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United

Kingdom.
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SIST EN 1254-6:2021
EN 1254-6:2021 (E)
Introduction

Products complying with this document may be used for several fluids including the transport of water

intended for human consumption if they comply with the relevant national, regional or local regulatory

provisions applicable in the place of use.
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SIST EN 1254-6:2021
EN 1254-6:2021 (E)
1 Scope

This document specifies product characteristics, assessment methods, compliance criteria of test results

and a designation system for push-fit fittings for the purpose of joining tubes of copper, plated copper,

multilayer pipes and plastics pipes. The fitting ends have a nominal diameter from 6 mm to 54 mm. The

fittings are designed for a service lifetime up to fifty years.

This document is applicable to push-fit fittings for joining one or more of the following tubes or pipes:

— copper tubes to EN 1057.

The fittings are used up to the operating temperatures and corresponding maximum operating pressures

as indicated in Annex A.

This document applies to copper alloy fittings. A non-exhaustive list of these copper alloys is given in

CEN/TS 13388.

Adaptor fittings may combine push-fit ends with fitting ends defined in the other parts of EN 1254.

Push-fit fittings for metallic tubes may also have flanged end connections according to EN 1092-3.

Push-fit fittings may also have a plated or other decorative surface coating.
Fittings can be produced by machining, metal forming, casting, or fabrication.

Products covered by this document are intended to be used in liquid applications:

— hot, cold or combined hot and cold water, including systems according to EN 806;

— closed heating systems according to EN 12828;
— cooling systems;
— drainage systems;
— fire protection systems including sprinkler systems according to EN 12845.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 681-1:1996, Elastomeric seals - Materials requirements for pipe joint seals used in water and drainage

applications - Part 1: Vulcanized rubber

EN 1057:2006+A1:2010, Copper and copper alloys - Seamless, round copper tubes for water and gas in

sanitary and heating applications

EN 1254-20:2021, Copper and copper alloys - Plumbing fittings - Part 20: Definitions, thread dimensions,

test methods, reference data and supporting information

EN 10226-3, Pipes threads where pressure tight joint are made on the threads - Part 3: Verification by

means of limit gauges

EN 12201-2, Plastics piping systems for water supply, and for drainage and sewerage under pressure -

Polyethylene (PE) - Part 2: Pipes
---------------------- Page: 8 ----------------------
SIST EN 1254-6:2021
EN 1254-6:2021 (E)

EN 12201-5, Plastics piping systems for water supply, and for drainage and sewerage under pressure -

Polyethylene (PE) - Part 5: Fitness for purpose of the system

EN 12502-2, Protection of metallic materials against corrosion - Guidance on the assessment of corrosion

likelihood in water distribution and storage systems - Part 2: Influencing factors for copper and copper alloys

EN ISO 3501, Plastics piping systems - Mechanical joints between fittings and pressure pipes - Test method

for resistance to pull-out under constant longitudinal force (ISO 3501)

EN ISO 3503, Plastics piping systems - Mechanical joints between fittings and pressure pipes - Test method

for leaktightness under internal pressure of assemblies subjected to bending (ISO 3503)

EN ISO 6506-1, Metallic materials - Brinell hardness test - Part 1: Test method (ISO 6506-1)

EN ISO 6507-1, Metallic materials - Vickers hardness test - Part 1: Test method (ISO 6507-1)

EN ISO 13056, Plastics piping systems - Pressure systems for hot and cold water - Test method for

leaktightness under vacuum (ISO 13056)

EN ISO 15874-2, Plastics piping systems for hot and cold water installations - Polypropylene (PP) - Part 2:

Pipes (ISO 15874-2)

EN ISO 15874-5, Plastics piping systems for hot and cold water installations - Polypropylene (PP) - Part 5:

Fitness for purpose of the system (ISO 15874-5)

EN ISO 15875-2, Plastics piping systems for hot and cold water installations - Crosslinked polyethylene (PE-

X) - Part 2: Pipes (ISO 15875-2)

EN ISO 15875-5, Plastics piping systems for hot and cold water installations - Crosslinked polyethylene (PE-

X) - Part 5: Fitness for purpose of the system (ISO 15875-5)

EN ISO 15876-2, Plastics piping systems for hot and cold water installations - Polybutene (PB) - Part 2: Pipes

(ISO 15876-2)

EN ISO 15876-5, Plastics piping systems for hot and cold water installations - Polybutene (PB) - Part 5:

Fitness for purpose of the system (ISO 15876-5)

EN ISO 15877-2, Plastics piping systems for hot and cold water installations - Chlorinated poly(vinyl

chloride) (PVC-C) - Part 2: Pipes (ISO 15877-2)

EN ISO 15877-5, Plastics piping systems for hot and cold water installations - Chlorinated poly(vinyl

chloride) (PVC-C) - Part 5: Fitness for purpose of the system (ISO 15877-5)

EN ISO 19892, Plastics piping systems - Thermoplastics pipes and fittings for hot and cold water - Test

method for the resistance of joints to pressure cycling (ISO 19892)

EN ISO 19893, Plastics piping systems - Thermoplastics pipes and fittings for hot and cold water - Test

method for the resistance of mounted assemblies to temperature cycling (ISO 19893)

EN ISO 21003-2, Multilayer piping systems for hot and cold water installations inside buildings - Part 2:

Pipes (ISO 21003-2)

EN ISO 21003-5, Multilayer piping systems for hot and cold water installations inside buildings - Part 5:

Fitness for purpose of the system (ISO 21003-5)
---------------------- Page: 9 ----------------------
SIST EN 1254-6:2021
EN 1254-6:2021 (E)

EN ISO 22391-2, Plastics piping systems for hot and cold water installations - Polyethylene of raised

temperature resistance (PE-RT) - Part 2: Pipes (ISO 22391-2)

EN ISO 22391-5, Plastics piping systems for hot and cold water installations - Polyethylene of raised

temperature resistance (PE-RT) - Part 5: Fitness for purpose of the system (ISO 22391-5)

ISO 7-2, Pipe threads where pressure-tight joints are made on the threads - Part 2: Verification by means of

limit gauges

ISO 228-2, Pipe threads where pressure-tight joints are not made on the threads - Part 2: Verification by

means of limit gauges

ISO 2859-1:1999, Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by

acceptance quality limit (AQL) for lot-by-lot inspection

ISO 9080, Plastics piping and ducting systems - Determination of the long-term hydrostatic strength of

thermoplastics materials in pipe form by extrapolation

ISO 9924-1, Rubber and rubber products - Determination of the composition of vulcanizates and uncured

compounds by thermogravimetry - Part 1: Butadiene, ethylene-propylene copolymer and terpolymer,

isobutene-isoprene, isoprene and styrene-butadiene rubbers

ISO 10508, Plastics piping systems for hot and cold water installations - Guidance for classification and

design
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 1254-20:2021 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
4 Product characteristics
4.1 Internal pressure

When tested according to the method in 5.2 fittings shall show no signs of leakage or permanent

distortion.
4.2 Tightness

4.2.1 Integrity of fabricated fitting bodies or having an 'as cast' microstructure

This requirement only applies to fitting bodies with an 'as cast' microstructure (excluding continuously

cast materials) or fabricated by welding or brazing.

When tested according to the method in 5.3.1 fitting bodies shall show no visual indication of leakage.

4.2.2 Leak tightness under internal hydrostatic pressure

Fittings assessed as indicated in 4.1 are considered to be leak tight under internal hydrostatic pressure.

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SIST EN 1254-6:2021
EN 1254-6:2021 (E)
4.2.3 Resistance to pull-out

When tested according to the method in 5.3.2 the joint assemblies shall withstand the pull-out force

without being separated and when subsequently tested according to the internal hydrostatic pressure

test described in 5.2 fittings shall show no signs of leakage or permanent distortion.

4.2.4 Leak tightness under vibration
This requirement only applies for jointing with metallic tubes.

When tested according to the method in 5.3.3 fittings shall show no signs of leakage.

4.2.5 Leak tightness under static flexural force

This requirement only applies for jointing with metallic tubes and is not applicable on threaded ends.

When tested according to the method in 5.3.4 fittings shall show no signs of leakage or permanent

distortion.

4.2.6 Leak tightness under internal hydrostatic pressure while subject to bending

This requirement only applies for jointing with multilayer or plastics pipes.

When tested according to the method in 5.3.5 fittings shall show no signs of leakage or permanent

distortion.
4.2.7 Leak tightness under vacuum.

When tested according to the method in 5.3.6 the change in pressure shall not be greater than 0,05 bar at

the conclusion of the test.
4.2.8 Leak tightness under temperature cycling

When tested according to the method in 5.3.7 fittings shall show no signs of leakage.

4.3 Resistance to high temperature (for heating networks)

The main aspect for the resistance to high temperature depends on the elastomeric sealing element.

Therefore the elastomer shall have the appropriate characteristics as specified in EN 681-1. The

elastomeric sealing elements shall conform to the requirements of EN 681-1:1996, Table 3 for continuous

hot water supply up to 110 °C except for Isoprene-Isobutylene Copolymer (IIR) where a volume change

in water up to and including 15 % is permitted.
4.4 Release of dangerous substances

National regulations on dangerous substances may require verification and declaration on release, and

sometimes content, when construction products covered by this document are placed on those markets.

In the absence of European harmonized test methods, verification and declaration on release/content

should be done taking into account national provisions in the place of use.

NOTE An informative database covering European and national provisions on dangerous substances is

available at the Construction website on EUROPA accessed through: http://ec.europa.eu/growth/tools-

databases/cp-ds.
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SIST EN 1254-6:2021
EN 1254-6:2021 (E)
4.5 Durability
4.5.1 Durability of internal pressure: Resistance to stress corrosion

Fittings manufactured from copper and copper-tin-zinc alloys (CuSnZnPb) shall be considered to be

resistant to stress corrosion according to EN 12502-2 and copper-zinc-silicon alloys containing ≥ 2 % Si

are also considered to be resistant.

Fittings manufactured from CuZn-alloys shall be considered to be resistant to stress corrosion when the

product has a hardness HBW 2,5/62,5 ≤ 110 measured according to EN ISO 6506-1 or a hardness

HV ≤ 134 measured according to EN ISO 6507-1.

Fittings manufactured from copper alloys with a zinc content of 10 % or greater not mentioned above

shall be tested and assessed according to 5.4.1, and shall show no evidence of cracking.

4.5.2 Durability of tightness
4.5.2.1 Resistance to dezincification

The resistance to dezincification of alloy fittings can be obtained by the correct material selection and

processing of that material.

Alloys containing 15 % or less zinc provide a good resistance to dezincification and don't need to be

tested.

Representative material samples, prior to machining, shall be tested. When tested according to 5.4.2.1,

the mean and maximum depth of dezincification in any direction shall be expressed in µm and shall meet

the acceptance criteria listed below for resistance to dezincification:
— for grade A: maximum 200 µm;
— for grade B: mean not to exceed 200 µm and maximum not to exceed 400 µm.

If any of the test pieces do not meet the criteria for the chosen grade, a second lot of test samples from

the same batch shall be selected and the test repeated. If any of the second lot of test pieces fails, then the

batch represented shall be deemed not to conform to the requirements of this document.

4.5.2.2 Resistance to pressure cycling

When tested according to the method in 5.4.2.2 fittings shall show no signs of leakage.

4.5.3 Durability of resistance to high temperature (for heating networks)

When tested according to the method in 5.4.3 to one or more of the specified test durations, the

compression set of the sealing element shall be expressed as a percentage.
4.6 Wall thickness at threaded portions of adaptor fittings
This requirement only applies to adaptor fittings with an interface thread.

When assessed according to the method specified in 5.5 the minimum wall thickness at the interface

thread shall be as expressed in EN 1254-20:2021, 4.1 for the relevant diameters.
4.7 Dimensions of tail pipe ends for swivel fittings
This requirement only applies to tail pipe ends for swivel fittings.

When assessed according to the method specified in 5.6 the dimensions shall be as expressed in

EN 1254-20:2021, 4.2 for the thread size.
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SIST EN 1254-6:2021
EN 1254-6:2021 (E)
4.8 Threaded end dimensions
This requirement only applies to fitting bodies with threaded ends.

When assessed according to the method specified in 5.7 the thread shall be in accordance with

EN 1254-20:2021, 4.4.
4.9 Other adapter ends (not defined in EN 1254-20:2021)

Other adapter ends, when assembled in accordance with the manufacturer's instructions and pressure

tested according to the method in 5.2 shall show no signs of leakage or permanent distortion. When re-

tested in accordance with the test method in 5.2 after disconnection and reconnection, it shall again show

no signs of leakage or permanent distortion. If after disconnection the sealing element shows signs of

damage, it shall be replaced before the second test.
4.10 Bore dimensions
To minimize flow resistance, minimum bore dimensions are required.

When assessed according to the method in 5.8, the minimum bore, including any internal tube support,

shall be greater or equal to the values expressed in EN 1254-20:2021, 4.5, for the relevant nominal

diameters.

Where an internal support is not required, the minimum bore of the fitting shall be greater than or equal

to the min bore of the corresponding pipe.

For unequal ended or adaptor fittings, the smallest diameter shall apply provided that this diameter does

not restrict other outlets.
4.11 Identity of elastomeric sealing material

During type testing, the method in 5.9 shall be used to establish the master reference thermogram for the

chosen sealing material.

The results of subsequent tests of the sealing material, carried out according to the method in 5.9, shall

be compared to the master reference thermogram to establish that the material is the same; any

differences shall be investigated. Results shall be retained for future comparison.

The identity relates to the elastomeric material and is independent of the fitting type, size or pattern.

4.12 Tube / pipe abutment
This requirement does not apply to threaded ends.

Fitting ends are usually manufactured with an abutment to limit tube or pipe insertion and to retain a

loose supporting sleeve, if used.

Fittings may be produced for special purposes, particularly useful for repairs, where the fitting ends do

not incorporate abutments, allowing the fitting to slide along the tube or pipe.

The dimensions of the abutment shall be such that it will stop the smallest possible tube according to

EN 1057:2006+A1:2010, Table 4 or pipe. The abutment shall also satisfy the minimum bore requirement

as stated in 4.10.
4.13 Alignment of the fitting ends

When tested according to the method in 5.10, the alignment of the fitting ends with reference to the

specified axis shall be within ± 2°.
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SIST EN 1254-6:2021
EN 1254-6:2021 (E)
4.14 Shapes for tightening systems

When visually inspected, fittings with threads shall have a shape or suitable features for the transmission

of tightening torques.
4.15 Surface condition
When visually inspected, fittings shall be free from sharp edges or burrs.
4.16 Disconnection and re-use (for fittings capable of being disconnected)
This requirement only applies to fittings capable of being disconnected.
When assessed accor
...

SLOVENSKI STANDARD
oSIST prEN 1254-6:2019
01-september-2019

Baker in bakrove zlitine - Fitingi - 6. del: Fitingi s priključki "push-fit" za spajanje s

kovinskimi, plastičnimi in večplastnimi cevmi

Copper and copper alloys - Plumbing fittings - Part 6: Push-fit fittings for use with metallic

tubes, plastics and multilayer pipes

Kupfer und Kupferlegierungen - Fittings - Teil 6: Einsteckfittings für den Einsatz mit

Metall-, Kunststoff- und Mehrschichtverbundrohren

Cuivre et alliages de cuivre - Raccords - Partie 6 : Raccords instantanés pour tubes

métalliques, tuyeaux en plastique et tubes multicouches
Ta slovenski standard je istoveten z: prEN 1254-6
ICS:
23.040.40 Kovinski fitingi Metal fittings
77.150.30 Bakreni izdelki Copper products
oSIST prEN 1254-6:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 1254-6:2019
---------------------- Page: 2 ----------------------
oSIST prEN 1254-6:2019
DRAFT
EUROPEAN STANDARD
prEN 1254-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2019
ICS 23.040.40 Will supersede EN 1254-6:2012
English Version
Copper and copper alloys - Plumbing fittings - Part 6:
Push-fit fittings for use with metallic tubes, plastics and
multilayer pipes

Cuivre et alliages de cuivre - Raccords - Partie 6 : Kupfer und Kupferlegierungen - Fittings - Teil 6:

Raccords instantanés pour tubes métalliques, tuyeaux Einsteckfittings für den Einsatz mit Metall-, Kunststoff-

en plastique et tubes multicouches und Mehrschichtverbundrohren

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 133.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations

which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC

Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, North

Macedonia, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United

Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1254-6:2019 E

worldwide for CEN national Members.
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oSIST prEN 1254-6:2019
prEN 1254-6:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 8

4 Product characteristics ................................................................................................................................. 8

4.1 Internal pressure ............................................................................................................................................ 8

4.2 Tightness ............................................................................................................................................................ 9

4.2.1 Integrity of fabricated fitting bodies or having an 'as cast' microstructure .............................. 9

4.2.2 Leak tightness under internal hydrostatic pressure ......................................................................... 9

4.2.3 Resistance to pull-out .................................................................................................................................... 9

4.2.4 Leak tightness under vibration .................................................................................................................. 9

4.2.5 Leak tightness under static flexural force .............................................................................................. 9

4.2.6 Leak tightness under internal hydrostatic pressure while subject to bending........................ 9

4.2.7 Leak tightness under vacuum ..................................................................................................................... 9

4.2.8 Leak tightness under temperature cycling ............................................................................................ 9

4.3 Resistance to high temperature (for heating networks) .................................................................. 9

4.4 Release of dangerous substances .............................................................................................................. 9

4.5 Durability ........................................................................................................................................................ 10

4.5.1 Durability of internal pressure ............................................................................................................... 10

4.5.2 Durability of tightness ................................................................................................................................ 10

4.5.3 Durability of resistance to high temperature (for heating networks)...................................... 10

4.6 Wall thickness at threaded portions of adaptor fittings ................................................................ 11

4.7 Dimensions of tail pipe ends for swivel fittings ................................................................................ 11

4.8 Threaded end dimensions ........................................................................................................................ 11

4.9 Other adapter ends (not defined in prEN 1254-20:2019) ............................................................. 11

4.10 Bore dimensions ........................................................................................................................................... 11

4.10.1 Minimum bore area through fittings without a supporting sleeve ............................................ 11

4.10.2 Minimum bore area through fittings with an integral or separate supporting sleeve ....... 12

4.11 Identity of elastomeric sealing material .............................................................................................. 13

4.12 Tube / pipe abutment ................................................................................................................................. 14

4.13 Alignment of the fitting ends .................................................................................................................... 14

4.14 Shapes for tightening systems ................................................................................................................. 14

4.15 Surface condition ......................................................................................................................................... 14

4.16 Disconnection and re-use (for fittings capable of being disconnected) ................................... 14

4.17 Plated or coated surfaces .......................................................................................................................... 14

5 Testing, assessment and sampling methods ...................................................................................... 14

5.1 General ............................................................................................................................................................. 14

5.1.1 Preparation of fittings for testing........................................................................................................... 14

5.1.2 Test temperature ......................................................................................................................................... 15

5.2 Internal hydrostatic pressure test ......................................................................................................... 15

5.3 Tightness ......................................................................................................................................................... 15

5.3.1 Integrity of fabricated fitting bodies or having an 'as cast' microstructure ........................... 15

5.3.2 Resistance to pull-out ................................................................................................................................. 15

5.3.3 Leak tightness under vibration (metallic tube only) ...................................................................... 16

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oSIST prEN 1254-6:2019
prEN 1254-6:2019 (E)

5.3.4 Leak tightness under static flexural force (metallic tube only) ................................................... 16

5.3.5 Leak tightness under internal hydrostatic pressure while subjected to bending

(plastics pipe only) ....................................................................................................................................... 16

5.3.6 Leak tightness under vacuum .................................................................................................................. 17

5.3.7 Leak tightness under temperature cycling ......................................................................................... 17

5.4 Durability......................................................................................................................................................... 18

5.4.1 Durability of internal pressure ................................................................................................................ 18

5.4.2 Durability of tightness ................................................................................................................................ 18

5.4.3 Durability of resistance to high temperature (for heating networks) ...................................... 19

5.5 Wall thickness at threaded portions of adaptor fittings ................................................................ 19

5.5.1 Type testing .................................................................................................................................................... 19

5.5.2 FPC testing ....................................................................................................................................................... 20

5.6 Dimensions of tail pipe ends for swivel fittings ................................................................................. 20

5.7 Threaded end dimensions ......................................................................................................................... 20

5.8 Bore dimensions ........................................................................................................................................... 20

5.9 Identity of elastomeric sealing material for liquid applications ................................................. 20

5.10 Alignment of the fitting ends .................................................................................................................... 20

5.11 Disconnection and re-use (for fittings capable of being disconnected) ................................... 20

6 Assessment and verification of constancy of performance - AVCP ............................................. 21

6.1 General ............................................................................................................................................................. 21

6.2 Type testing .................................................................................................................................................... 21

6.2.1 General ............................................................................................................................................................. 21

6.2.2 Test samples, testing and compliance criteria ................................................................................... 22

6.2.3 Test reports .................................................................................................................................................... 24

6.3 Factory production control (FPC) ........................................................................................................... 24

6.3.1 General ............................................................................................................................................................. 24

6.3.2 Requirements ................................................................................................................................................. 24

6.3.3 Product specific requirements ................................................................................................................ 27

6.3.4 Procedure for modifications ..................................................................................................................... 28

6.3.5 One-off products, pre-production products (e.g. prototypes) and products produced

in very low quantity ..................................................................................................................................... 28

7 Classification, designation and coding .................................................................................................. 29

8 Marking, labelling and packaging ........................................................................................................... 29

8.1 General ............................................................................................................................................................. 29

8.2 Dezincification resistant copper zinc alloys ....................................................................................... 30

Annex A (normative) Intended operating temperatures and design pressures .................................. 31

Bibliography ................................................................................................................................................................. 33

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oSIST prEN 1254-6:2019
prEN 1254-6:2019 (E)
European foreword

This document (prEN 1254-6:2019) has been prepared by Technical Committee CEN/TC 133 “Copper

and copper alloys”, the secretariat of which is held by DIN.
This document is a working document.
This document will supersede EN 1254-6:2012.

This part of the standard (EN 1254-6) should be read in conjunction with prEN 1254-20:2019.

EN 1254 comprises the following parts under the general title “Copper and copper alloys — Plumbing

fittings”:
— Part 1: Capillary fittings for soldering or brazing to copper tubes
— Part 2: Compression fittings for use with copper tubes
— Part 3: Compression fittings for use with plastics and multilayer pipes
— Part 4: Threaded fittings
— Part 5: Capillary fittings with short ends for brazing to copper tubes

— Part 6: Push-fit fittings for use with metallic tubes, plastics and multilayer pipes

— Part 7: Press fittings for use with metallic tubes
— Part 8: Press fittings for use with plastics and multilayer pipes

— Part 20: Definitions, thread dimensions, test methods, reference data and supporting information

The main changes to EN1254-6:2012 are:

— improved alignment with plastic and multilayer pipe standards for hot and cold water applicartions;

— separation of test methods into part 20.
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oSIST prEN 1254-6:2019
prEN 1254-6:2019 (E)
Introduction

Products complying with this European standard may be used for the transport of water intended for

human consumption if they comply with the relevant national, regional or local regulatory provisions

applicable in place of use.
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oSIST prEN 1254-6:2019
prEN 1254-6:2019 (E)
1 Scope

This document specifies product characteristics, assessment methods, compliance criteria and a

designation system for push-fit fittings for the purpose of joining tubes of copper, plated copper,

multilayer pipes and plastics pipes. The fitting ends have a size range from 6 mm to 54 mm. The fittings

are designed for a service lifetime up to fifty years.

This document is applicable to push-fit fittings for joining one or more of the following tubes or pipes:

— copper tubes to EN 1057; copper composite according to UNI 11342, plastic and multilayer pipes

covered by EN 15015.

The fittings are used up to the operating temperatures and maximum operating pressures as indicated in

Annex A.

This document applies to copper alloy fittings. A non-exhaustive list of these copper alloys is given in

CEN/TS 13388.

Adaptor fittings may combine push-fit ends with fitting ends defined in the other parts of EN 1254.

Push-fit fittings for metallic tubes may also have flanged end connections according to EN 1092-3.

Push-fit fittings may also have a plated or other decorative surface coating.
Fittings can be produced by machining, metal forming, casting, or fabrication.

Products covered by this standard are intended to be used in liquid applications:

— hot, cold or combined hot and cold water systems according to EN 806;
— closed heating systems according to EN 12828 and cooling systems;
— drainage systems;
— sprinkler systems according to EN 12845.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 681-1:1996, Elastomeric seals — Materials requirements for pipe joint seals used in water and drainage

applications - Part 1: Vulcanized rubber

EN 723, Copper and copper alloys — Combustion method for determination of the carbon content on the

inner surface of copper tubes or fittings

EN 806 (series), Specifications for installations inside buildings conveying water for human consumption

EN 1057:2006+A1:2010, Copper and copper alloys — Seamless, round copper tubes for water and gas in

sanitary and heating applications

EN 1092-3, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN

designated - Part 3: Copper alloy flanges

prEN 1254-20:2019, Copper and copper alloys — Plumbing fittings — Part 20: Definitions, thread

dimensions, test methods, reference data and supporting information
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oSIST prEN 1254-6:2019
prEN 1254-6:2019 (E)

EN 10226-3, Pipes threads where pressure tight joint are made on the threads — Part 3: Verification by

means of limit gauges

EN 12502-2, Protection of metallic materials against corrosion - Guidance on the assessment of corrosion

likelihood in water distribution and storage systems — Part 2: Influencing factors for copper and copper

alloys
EN 12828, Heating systems in buildings — Design for water-based heating systems

EN 12845, Fixed firefighting systems — Automatic sprinkler systems — Design, installation and

maintenance

EN 15015, Plastics piping systems — Systems for hot and cold water not intended for human consumption

— Performance characteristics for pipes, fittings and their joints

EN ISO 3501, Plastics piping systems — Mechanical joints between fittings and pressure pipes — Test

method for resistance to pull-out under constant longitudinal force (ISO 3501)

EN ISO 3503, Plastics piping systems — Mechanical joints between fittings and pressure pipes — Test

method for leaktightness under internal pressure of assemblies subjected to bending (ISO 3503)

EN ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method (ISO 6506-1)

EN ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method (ISO 6507-1)

EN ISO 13056, Plastics piping systems — Pressure systems for hot and cold water — Test method for

leaktightness under vacuum (ISO 13056)

EN ISO 15874-2, Plastics piping systems for hot and cold water installations — Polypropylene (PP) — Part

2: Pipes (ISO 15874-2:2013)

EN ISO 15874-5, Plastics piping systems for hot and cold water installations — Polypropylene (PP) — Part

5: Fitness for purpose of the system (ISO 15874-5)

EN ISO 15875-2, Plastics piping systems for hot and cold water installations — Crosslinked polyethylene

(PE-X) — Part 2: Pipes (ISO 15875-2)

EN ISO 15875-5, Plastics piping systems for hot and cold water installations — Crosslinked polyethylene

(PE-X) — Part 5: Fitness for purpose of the system (ISO 15875-5)

EN ISO 15876-2, Plastics piping systems for hot and cold water installations — Polybutene (PB) — Part 2:

Pipes (ISO 15876-2)

EN ISO 15876-5, Plastics piping systems for hot and cold water installations — Polybutene (PB) — Part 5:

Fitness for purpose of the system (ISO 15876-5)

EN ISO 15877-2, Plastics piping systems for hot and cold water installations — Chlorinated poly(vinyl

chloride) (PVC-C) — Part 2: Pipes (ISO 15877-2)

EN ISO 15877-5, Plastics piping systems for hot and cold water installations — Chlorinated poly(vinyl

chloride) (PVC-C) — Part 5: Fitness for purpose of the system (ISO 15877-5)

EN ISO 19892, Plastics piping systems — Thermoplastics pipes and fittings for hot and cold water — Test

method for the resistance of joints to pressure cycling (ISO 19892)
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oSIST prEN 1254-6:2019
prEN 1254-6:2019 (E)

EN ISO 19893, Plastics piping systems — Thermoplastics pipes and fittings for hot and cold water — Test

method for the resistance of mounted assemblies to temperature cycling (ISO 19893)

EN ISO 21003-2, Multilayer piping systems for hot and cold water installations inside buildings — Part 2:

Pipes (ISO 21003-2)

EN ISO 21003-5, Multilayer piping systems for hot and cold water installations inside buildings — Part 5:

Fitness for purpose of the system (ISO 21003-5)

EN ISO 22391-2, Plastics piping systems for hot and cold water installations — Polyethylene of raised

temperature resistance (PE-RT) - Part 2: Pipes (ISO 22391-2)

EN ISO 22391-5, Plastics piping systems for hot and cold water installations - Polyethylene of raised

temperature resistance (PE-RT) — Part 5: Fitness for purpose of the system (ISO 22391-5)

ISO 7-2, Pipe threads where pressure-tight joints are made on the threads — Part 2: Verification by means

of limit gauges

ISO 228-2, Pipe threads where pressure-tight joints are not made on the threads — Part 2: Verification by

means of limit gauges

ISO 2859-1:1999, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by

acceptance quality limit (AQL) for lot-by-lot inspection
ISO 6957:1988, Copper alloys — Ammonia test for stress corrosion resistance

ISO 9080, Plastics piping and ducting systems — Determination of the long-term hydrostatic strength of

thermoplastics materials in pipe form by extrapolation

ISO 9924-1, Rubber and rubber products — Determination of the composition of vulcanizates and uncured

compounds by thermogravimetry — Part 1: Butadiene, ethylene-propylene copolymer and terpolymer,

isobutene-isoprene, isoprene and styrene-butadiene rubbers

ISO 10508, Plastics piping systems for hot and cold water installations — Guidance for classification and

design

UNI 11342, Copper and copper alloys - Composite, seamless copper-PE, tubes for fluid distribution

3 Terms and definitions

For the purposes of this document, the terms and definitions given in prEN 1254-20:2019 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
4 Product characteristics
4.1 Internal pressure

When tested according to the method in 5.2 fittings shall show no signs of leakage or permanent

distortion.
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oSIST prEN 1254-6:2019
prEN 1254-6:2019 (E)
4.2 Tightness

4.2.1 Integrity of fabricated fitting bodies or having an 'as cast' microstructure

This requirement only applies to fitting bodies with an 'as cast' microstructure (excluding continuously

cast materials) or fabricated by welding or brazing.

When tested according to the method in 5.3.1 fitting bodies shall show no visual indication of leakage.

4.2.2 Leak tightness under internal hydrostatic pressure

Fittings assessed as indicated in 4.1 are considered to be leak tight under internal hydrostatic pressure.

4.2.3 Resistance to pull-out

When tested according to the method in 5.3.2 the joint assemblies shall withstand the pull-out force

without being separated and shall show no signs of leakage when subjected to the subsequent leak

tightness under internal hydrostatic pressure test as described in 5.2.
4.2.4 Leak tightness under vibration
This requirement only applies for jointing with metallic tubes.

When tested according to the method in 5.3.3 fittings shall show no signs of leakage.

4.2.5 Leak tightness under static flexural force

This requirement only applies for jointing with metallic tubes and is not applicable on threaded ends.

When tested according to the method in 5.3.4 fittings shall show no signs of leakage or permanent

distortion.

4.2.6 Leak tightness under internal hydrostatic pressure while subject to bending

This requirement only applies for jointing with multilayer or plastics pipes.

When tested according to the method in 5.3.5 fittings shall show no signs of leakage or permanent

distortion.
4.2.7 Leak tightness under vacuum

When tested according to the method in 5.3.6 the change in pressure shall not be greater than 0,05 bar at

the conclusion of the test.
4.2.8 Leak tightness under temperature cycling

When tested according to the method in 5.3.7 fittings shall show no signs of leakage.

4.3 Resistance to high temperature (for heating networks)

The main aspect for the resistance to high temperature depends on the elastomeric sealing element.

Therefore the elastomer shall have the appropriate characteristics as specified in EN 681-1. The

elastomeric sealing elements shall conform to the requirements of EN 681-1:1996, Table 3 for continuous

hot water supply up to 110 °C except for Isoprene-Isobutylene Copolymer (IIR) where a volume change

in water up to and including 15 % is permitted.
4.4 Release of dangerous substances

National regulations on dangerous substances may require verification and declaration on release, and

sometimes content, when construction products covered by this standard are placed on those markets.

In the absence of European harmonized test methods, verification and declaration on release/content

should be done taking into account national provisions in the place of use.
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oSIST prEN 1254-6:2019
prEN 1254-6:2019 (E)
4.5 Durability
4.5.1 Durability of internal pressure
4.5.1.1 Resistance to stress corrosion

Fittings manufactured from copper and copper-tin-zinc alloys (CuSnZnPb) shall be considered to be

resistant to stress corrosion according to EN 12502-2 and copper-zinc-silicon alloys containing ≥ 2 % Si

are also considered to be resistant.

Fittings manufactured from CuZn-alloys shall be considered to be resistant to stress corrosion when the

product has a hardness HBW 2,5/62,5 ≤ 110 measured according to EN ISO 6506-1 or a hardness

HV ≤ 134 measured according to EN ISO 6507-1.

Fittings manufactured from copper alloys with a zinc content of 10 % or greater not mentioned above

shall be tested and assessed according to 5.4.1.1, and shall show no evidence of cracking.

4.5.2 Durability of tightness
4.5.2.1 Residual carbon contamination in the bore

This requirement only applies to copper fittings. This requirement does not apply to copper alloy fittings.

4.5.2.1.1 Carbon film
When tested according to 5.4.2.1 there shall not be any visible carbon film.
4.5.2.1.2 Total carbon
When tested according to 5.4.2.2 the maximum total carbon level on internal sur
...

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