SIST EN 1254-8:2021+A1:2025
(Main + Amendment)Copper and copper alloys - Plumbing fittings - Part 8: Press fittings for use with plastics and multilayer pipes
Copper and copper alloys - Plumbing fittings - Part 8: Press fittings for use with plastics and multilayer pipes
This document specifies product characteristics, assessment methods, compliance criteria of test results and a designation system for fittings with radial and axial press ends for use with plastics and multilayer pipes. The fitting ends have a nominal diameter from 10 mm to 160 mm. The fittings are designed for a service lifetime up to fifty years.
This document applies to copper alloy fittings. A non-exhaustive list of these copper alloys is given in CEN/TS 13388.
Adaptor fittings for use with plastics and multilayer pipes may combine press ends with fitting ends defined in the other parts of EN 1254.
Press fittings for use with plastics and multilayer pipes may also have flanged end connections according to EN 1092-3.
Press fittings for use with plastics and multilayer pipes 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:
a) 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;
- supply systems for points of consumption with liquid fuels according to EN 12514.
b) gas applications:
- natural gas and liquefied petroleum gas systems with a maximum operating pressure less than or equal to 5 bar according to EN 1775;
- compressed air systems.
Kupfer und Kupferlegierungen - Fittings - Teil 8: Pressfittings für den Einsatz mit Kunststoff- und Mehrschichtverbundrohren
Dieses Dokument legt Produkteigenschaften, Bewertungsverfahren, Übereinstimmungskriterien der Prüf-ergebnisse und ein Bezeichnungssystem für Radial- und Axial-Pressfittings für Kunststoff- und Mehrschicht¬verbundrohre fest. Die Fittingenden haben einen Nenndurchmesser von 10 mm bis 160 mm. Die Fittings sind für eine Lebensdauer von bis zu fünfzig Jahren ausgelegt.
Dieses Dokument ist anwendbar für Fittings aus Kupferlegierungen. Eine nicht vollständige Liste dieser Kupfer¬legierungen ist in CEN/TS 13388 enthalten.
Übergangsfittings für Kunststoff- und Mehrschichtverbundrohre dürfen Pressenden mit in den anderen Teilen der EN 1254 definierten Fittingenden kombinieren.
Pressfittings für Kunststoff- und Mehrschichtverbundrohre dürfen auch Flanschendanschlüsse nach EN 1092-3 aufweisen.
Pressfittings für Kunststoff- und Mehrschichtverbundrohre dürfen auch galvanische oder andere dekorative Oberflächenüberzüge aufweisen.
Fittings können durch maschinelles Bearbeiten, Umformen, Gießen oder Fügen von Vormaterial hergestellt werden.
Die unter dieses Dokument fallenden Produkte sind für den Einsatz bestimmt in:
a) Flüssigkeitsanwendungen:
- warmes, kaltes oder kombiniertes Warm- und Kaltwasser, einschließlich Systeme nach EN 806;
- geschlossene Heizungsanlagen nach EN 12828;
- Kühlsysteme;
- Entwässerungssysteme;
- Brandbekämpfungsanlagen einschließlich Sprinkleranlagen nach EN 12845;
- Versorgungsanlagen für Verbrauchsstellen mit flüssigen Brennstoffen nach EN 12514.
b) Gasanwendungen:
- Erdgas- und Flüssiggasanlagen mit einem maximalen Betriebsdruck von weniger als oder gleich 5 bar nach EN 1775;
- Druckluftsysteme.
Cuivre et alliages de cuivre - Raccords - Partie 8 : Raccords à sertir pour tubes en matières plastiques et multicouches
Le présent document spécifie les caractéristiques de produit, les méthodes d'évaluation, les critères de conformité des résultats d’essai et un système de désignation pour les raccords pour le sertissage radial ou axial de tubes en plastique et multicouche. Les extrémités de raccords ont un diamètre nominal compris entre 10 mm et 160 mm. Les raccords sont conçus pour une durée de vie en service jusqu'à 50 ans.
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 utilisés avec des tubes en matières plastiques et multicouches peuvent combiner des extrémités à sertir avec des extrémités de raccord définies dans les autres parties de l’EN 1254.
Les raccords à sertir pour tubes en matières plastiques et multicouches peuvent également comporter des raccordements à brides conformément à l’EN 1092-3.
Les raccords à sertir pour tubes en matières plastiques et multicouches 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 le présent document sont destinés à être utilisés dans :
a) les applications liquides :
- les systèmes d'eau chaude, d'eau froide ou d'eau chaude et d'eau froide combinées, y compris les systèmes conformes à l’EN 806 ;
- les systèmes de chauffage fermés conformes à l'EN 12828 ;
- les systèmes de refroidissement ;
- les systèmes de purge ;
- les systèmes de protection contre l’incendie, y compris les systèmes d'extinction de type sprinkleur conformes à l’EN 12845 ;
- les systèmes d'approvisionnement des points de consommation en combustibles liquides selon l’EN 12514.
b) les applications de gaz :
- les systèmes fonctionnant au gaz naturel et des systèmes fonctionnant au gaz de pétrole liquéfiés avec une pression maximale de service inférieure ou égale à 5 bar, conformément à l'EN 1775 ;
- les systèmes d’air comprimé.
Baker in bakrove zlitine - Fitingi - 8. del: Fitingi s stiskalnimi priključki za spajanje s plastičnimi in večplastnimi cevmi (vključno z dopolnilom A1)
Ta dokument določa značilnosti izdelka, metode ocenjevanja, merila skladnosti za rezultate preskusov ter sistem označevanja za fitinge z radialnimi in aksialnimi stiskalnimi priključki za spajanje s plastičnimi oziroma večplastnimi cevmi. Priključki fitingov imajo nazivni premer od 10 mm do 160 mm. Pričakovana uporabna življenjska doba fitingov je največ petdeset let.
Ta dokument se uporablja za fitinge iz bakrovih zlitin. Neizčrpen seznam teh fitingov je podan v standardu CEN/TS 13388.
Fitingi z adapterskimi priključki za spajanje s plastičnimi in večplastnimi cevmi lahko vključujejo stiskalne priključke ter priključke iz drugih delov standarda EN 1254.
Fitingi s stiskalnimi priključki za spajanje s plastičnimi in večslojnimi cevmi imajo lahko tudi prirobne končne priključke v skladu s standardom EN 1092-3 ter so lahko prevlečeni z zaščitno plastjo ali drugo dekorativno prevleko.
Fitinge je mogoče izdelati s strojno obdelavo, preoblikovanjem kovin, ulivanjem ali običajnimi postopki izdelave.
Izdelki, zajeti v tem dokumentu, so namenjeni uporabi:
a) tekočine:
– topla ali hladna voda ali kombinacija tople in hladne vode, vključno s sistemi v skladu s standardom EN 806;
– zaprti ogrevalni sistemi v skladu s standardom EN 12828;
– hladilni sistemi;
– drenažni sistemi;
– protipožarni sistemi, vključno s sprinklerskimi sistemi v skladu s standardom EN 12845;
– sistemi za oskrbo uporabnikov s tekočimi gorivi v skladu s standardom EN 12514;
b) plina:
– sistemi zemeljskega plina in utekočinjenega naftnega plina z največjim delovnim tlakom, manjšim ali enakim 5 barov v skladu s standardom EN 1775;
– sistemi stisnjenega zraka.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2025
Baker in bakrove zlitine - Fitingi - 8. del: Fitingi s stiskalnimi priključki za spajanje
s plastičnimi in večplastnimi cevmi (vključno z dopolnilom A1)
Copper and copper alloys - Plumbing fittings - Part 8: Press fittings for use with plastics
and multilayer pipes
Kupfer und Kupferlegierungen - Fittings - Teil 8: Pressfittings für den Einsatz mit
Kunststoff- und Mehrschichtverbundrohren
Cuivre et alliages de cuivre - Raccords - Partie 8 : Raccords à sertir pour tubes en
matières plastiques et multicouches
Ta slovenski standard je istoveten z: EN 1254-8:2021+A1:2025
ICS:
23.040.40 Kovinski fitingi Metal fittings
77.150.30 Bakreni izdelki Copper products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 1254-8:2021+A1
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2025
EUROPÄISCHE NORM
ICS 23.040.40 Supersedes EN 1254-8:2021
English Version
Copper and copper alloys - Plumbing fittings - Part 8: Press
fittings for use with plastics and multilayer pipes
Cuivre et alliages de cuivre - Raccords - Partie 8 : Kupfer und Kupferlegierungen - Fittings - Teil 8:
Raccords à sertir pour tubes en matières plastiques et Pressfittings für den Einsatz mit Kunststoff- und
multicouches Mehrschichtverbundrohren
This European Standard was approved by CEN on 23 November 2020 and includes Amendment 1 approved by CEN on 5
December 2024.
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, Türkiye 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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1254-8:2021+A1:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
Introduction . 6
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 10
4 Product characteristics . 10
4.1 Internal pressure . 10
4.2 Tightness . 10
4.3 Resistance to high temperature for fittings with elastomeric seals (for heating
networks) . 11
4.4 Release of dangerous substances . 12
4.5 Durability . 12
4.6 Wall thickness at threaded portions of adaptor fittings . 13
4.7 Dimensions of tail pipe ends for swivel fittings . 13
4.8 Dimensions of gas union connectors . 13
4.9 Threaded end dimensions . 13
4.10 Other adapter ends (not defined in !EN 1254-20:2021+A1:2025") . 13
4.11 Bore dimensions . 13
4.12 Identity of elastomeric sealing material for liquid applications . 13
4.13 Identity of elastomeric sealing material for gas applications . 14
4.14 Pipe abutment . 14
4.15 Alignment of the fitting ends . 14
4.16 Shapes for tightening systems . 14
4.17 Surface condition . 14
4.18 Plated or coated surfaces . 14
4.19 Internal support . 14
4.20 !Wall thickness of the fitting body" . 14
5 Testing, assessment and sampling methods . 15
5.1 General . 15
5.2 Internal pressure . 15
5.3 Tightness . 16
5.4 Durability . 19
5.5 Wall thickness at threaded portions of adaptor fittings . 20
5.6 Dimensions of tail pipe ends for swivel fittings . 20
5.7 Dimensions of gas union connectors . 21
5.8 Threaded end dimensions . 21
5.9 Bore dimensions . 21
5.10 Identity of elastomeric sealing material for liquid applications . 21
5.11 Identity of elastomeric sealing material for gas applications . 21
5.12 Alignment of the fitting ends . 21
5.13 !Wall thickness of the fitting body" . 21
6 Evaluation of conformity . 22
6.1 General . 22
6.2 Type testing . 22
6.3 Factory production control (FPC) . 27
7 Designation. 31
8 Marking, labelling and packaging . 31
8.1 General . 31
8.2 Additional marking . 31
8.3 Dezincification resistant copper zinc alloys . 32
Bibliography . 33
European foreword
This document (EN 1254-8:2021+A1:2025) 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 August 2025, and conflicting national standards shall
be withdrawn at the latest by August 2025.
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 includes Amendment 1 approved by CEN on 5 December 2024.
This document supersedes !EN 1254-8:2021".
The start and finish of text introduced or altered by amendment is indicated in the text by tags !".
The main changes compared to EN 1254-8:2012 are:
— improved alignment with plastics and multilayer pipe standards for hot and cold water
applications;
— separation of test methods into part 20.
!The need for an amendment was based on the following points:
— editorially correct “lifetime up to fifty” by adding “years” in the scope;
— update normative references;
— include a wall thickness requirement for copper alloy fittings used in systems according to
EN ISO 15874, EN ISO 15875, EN ISO 15876, EN ISO 15877, EN ISO 21003 and EN ISO 22391."
This part of the standard (EN 1254-8) should be read in conjunction with
!EN 1254-20:2021+A1:2025".
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.
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.
1 Scope
This document specifies product characteristics, assessment methods, compliance criteria of test results
and a designation system for fittings with radial and axial press ends for use with plastics and
multilayer pipes. The fitting ends have a nominal diameter from 10 mm to 160 mm. The fittings are
designed for a service lifetime up to fifty !years".
This document applies to copper alloy fittings. A non-exhaustive list of these copper alloys is given in
CEN/TS 13388.
Adaptor fittings for use with plastics and multilayer pipes may combine press ends with fitting ends
defined in the other parts of EN 1254.
Press fittings for use with plastics and multilayer pipes may also have flanged end connections
according to EN 1092-3.
Press fittings for use with plastics and multilayer pipes 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:
a) 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;
— supply systems for points of consumption with liquid fuels according to EN 12514.
b) gas applications:
— natural gas and liquefied petroleum gas systems with a maximum operating pressure less than
or equal to 5 bar according to EN 1775;
— compressed air systems.
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 549:2019+A1:2024, Rubber materials for seals and diaphragms for gas appliances and gas
equipment"
EN 681-1:1996, Elastomeric seals — Materials requirements for pipe joint seals used in water and
drainage applications — Part 1: Vulcanized rubber
EN 682, Elastomeric seals — Materials requirements for seals used in pipes and fittings carrying gas and
hydrocarbon fluids
!EN 1254-20:2021+A1:2025, 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 joints 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
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 (ISO6507-1)
EN ISO 1167 (all parts), Thermoplastics pipes, fittings and assemblies for the conveyance of fluids —
Determination of the resistance to internal pressure (ISO 1167)
EN ISO 13056, Plastics piping systems — Pressure systems for hot and cold water — Test method for
leaktightness under vacuum (ISO13056)
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 — Cross-linked 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 — Polybutylene (PB) —
Part 2: Pipes (ISO 15876-2)
EN ISO 15876-5, Plastics piping systems for hot and cold water installations — Polybutylene (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 associated fittings for hot and cold
water — Test method for 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 pipe systems for hot and cold water installations inside buildings — Part 2:
Pipes (ISO 21003-2)
EN ISO 21003-5, Multilayer pipe 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 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
3 Terms and definitions
For the purposes of this document, the terms and definitions given in
!EN 1254-20:2021+A1:2025" 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
4.1.1 For liquid applications
When tested according to the method in 5.2.1 fittings shall show no signs of leakage or permanent
distortion.
4.1.2 For fuel gas applications
When tested according to the method in 5.2.2 fittings shall show no signs of leakage or permanent
distortion.
4.1.3 For compressed air applications
When tested according to the method in 5.2.3 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 5.3.1.1 fitting bodies shall show no visual indication of leakage.
4.2.2 Requirements for liquid applications
4.2.2.1 Leak tightness under internal hydrostatic pressure
Fittings assessed as indicated in 4.1.1 are considered to be leak tight under internal hydrostatic
pressure.
4.2.2.2 Leak tightness under vacuum
When tested according to the method in 5.3.2.1 the change in pressure shall not be greater than
0,05 bar at the conclusion of the test.
4.2.2.3 Leak tightness under temperature cycling (for heating networks)
When tested according to the method in 5.3.2.2 fittings shall show no signs of leakage or permanent
distortion.
4.2.2.4 Resistance to pull-out
When tested according to the method in 5.3.1.2 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 5.2.1.
4.2.2.5 Leak tightness under internal hydrostatic pressure while subject to bending
When tested according to the method in 5.3.2.3 fittings shall show no signs of leakage or permanent
distortion.
4.2.2.6 Leak before press
If the manufacturer claims this feature, then when tested according to the method in 5.3.2.4 fittings
shall leak at least one water drop per second.
4.2.3 Requirements for gas applications
4.2.3.1 Leak tightness under internal pneumatic pressure
Fittings assessed as indicated in 4.1.2 and 4.1.3 are considered to be leak tight under internal pneumatic
pressure.
4.2.3.2 Resistance to pull-out
When tested according to the method in 5.3.1.2 the joint assemblies shall withstand the pull-out force
without being separated and shall show no signs of leakage when subsequently tested according to the
method in 5.2.2 and/or 5.2.3 according to the application, fittings shall show no signs of leakage or
permanent distortion.
4.2.3.3 Leak tightness under temperature cycling for fuel gas applications
When tested according to the test method in 5.3.3.1 fittings shall show no signs of leakage.
4.2.3.4 Leak before press
If the manufacturer claims this feature, then when tested according to the method in 5.3.3.2 fittings
shall leak at least one bubble per second when tested pneumatically.
4.2.3.5 Press fitting with elastomeric seals for fuel gas application inside buildings
The main aspect for the durability of tightness for fuel gas application inside buildings is the ozone
behaviour of the elastomer. Therefore the elastomer shall be ozone resistant and comply with the
requirements of EN 549 class B2 or higher.
4.2.3.6 Press fitting with elastomeric seals for fuel gas application outside buildings
The main aspect for the durability of tightness for fuel gas application outside buildings depends on the
elastomeric sealing element. Therefore, the elastomer shall comply with the requirements of EN 682
types GAL or GBL.
4.3 Resistance to high temperature for fittings with elastomeric seals (for heating
networks)
The main aspect for the resistance to high temperature liquid applications 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.
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
This requirement only applies where a fitting is declared to be resistant 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 fail, then the
batch represented shall be deemed not to conform to the requirements of this document.
4.5.2.2 Resistance to pressure cycling for liquid applications
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 material 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+A1:2025, 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+A1:2025, 4.2" for the thread size.
4.8 Dimensions of gas union connectors
This requirement only applies to fittings with gas union connectors.
When assessed according to the method specified in 5.7 the dimensions shall be as expressed in
!EN 1254-20:2021+A1:2025, 4.3" for corresponding nominal size.
4.9 Threaded end dimensions
This requirement only applies to fitting bodies with threaded ends.
When assessed according to the method specified in 5.8 the thread shall be in accordance with
!EN 1254-20:2021+A1:2025, 4.4".
4.10 Other adapter ends (not defined in !EN 1254-20:2021+A1:2025")
Other adapter ends, when assembled in accordance with the manufacturer's instructions and pressure
tested according to the method in 5.2 for the intended application, shall show no signs of leakage or
permanent distortion. When re-tested in accordance with the test method in 5.2 for the intended
application 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.
4.11 Bore dimensions
To minimize flow resistance, minimum bore dimensions are required.
When assessed according to the method in 5.9, the minimum bore, including any internal pipe support,
shall be greater or equal to the values expressed in !EN 1254-20:2021+A1:2025, 4.5, Table 10", 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.
4.12 Identity of elastomeric sealing material for liquid applications
During type testing, the method in 5.10 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 5.10, 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.
4.13 Identity of elastomeric sealing material for gas applications
During type testing, the method in 5.11 shall be used to establish the master reference spectra for the
chosen sealing material.
The results of subsequent tests of the sealing material, carried out according to the method in 5.11, shall
be compared to the master reference spectra 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.
4.14 Pipe abutment
This requirement does not apply to threaded ends.
Fitting ends are usually manufactured with an abutment to limit 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 pipe.
The dimensions of the abutment shall be such that it will stop the smallest possible pipe. The abutment
shall also satisfy the minimum bore requirement as stated in 4.10.
4.15 Alignment of the fitting ends
When tested according to the method in 5.12, the alignment of the fitting ends with reference to the
specified axis shall be within ± 2°.
4.16 Shapes for tightening systems
When visually inspected, fittings with threads shall have a shape or suitable features for the
transmission of tightening torques.
4.17 Surface condition
When visually inspected, fittings shall be free from sharp edges or burrs.
4.18 Plated or coated surfaces
Requirements for plated or coated surfaces shall be the subject of agreement between the purchaser
and the manufacturer and shall not impair the performance of the joint.
4.19 Internal support
Fittings for gas applications shall include either an integral internal support or separate support sleeve
that is compatible with the specified pipe.
NOTE Internal supports are specific to the type of pipe and to each manufacturer of fittings. They cannot be
interchanged.
4.20 !Wall thickness of the fitting body
This requirement only applies to copper alloy fittings used in systems according to the EN ISO 15874,
EN ISO 15875, EN ISO 15876, EN ISO 15877, EN ISO 21003 and EN ISO 22391 series. The minimum wall
thickness requirement shall not apply along the cone angle or to the thickness of the loose ring or sleeve
where such a ring or sleeve has been or is intended to be deformed to form a seal. It also shall not apply
to any supporting sleeve.
When assessed according to the method specified in 5.13, the minimum wall thickness of the fitting
body shall be as expressed in EN 1254-20:2021+A1:2025, Clause 22, for the relevant diameters."
5 Testing, assessment and sampling methods
5.1 General
5.1.1 Preparation of fittings for testing
Unless otherwise stated, the fittings to be tested shall be assembled with the relevant plastics or
multilayer pipe in accordance with the manufacturer’s instructions.
All sizes of fitting and each pipe material, unless otherwise specified, shall be tested.
Where there are a range of wall thicknesses for a given pipe type, test a pipe with the maximum wall
thickness and a pipe with the minimum wall thickness.
The fittings shall be assembled and tested with the pipe as specified by the manufacturer.
A support sleeve may be required, please refer to manufacturer's instructions.
Combinations of fitting size within a test rig are possible. The minimum distance between the fitting
under test and each end of the assembly shall be 100 mm. Adaptor fittings used to connect the test
pipework to a pump for example, may also be considered as a test fitting.
New fittings are required for each test.
NOTE See also !EN 1254-20:2021+A1:2025, Annex A".
5.1.2 Test temperature
Tests shall be conducted at a temperature of (23 ± 5) °C unless otherwise stated.
5.1.3 Tolerances
When tolerances are not specified, the values shall be within ± 5 % of the nominal value.
5.2 Internal pressure
5.2.1 Internal hydrostatic pressure test
Use the test method described in EN ISO 1167 (all parts) using the parameters shown in Table 1.
Table 1 — Hydrostatic pressure test parameters
Pipe material Test parameters
PP
EN ISO 15874-5
EN ISO 15874-2
PE-X
EN ISO 15875-5
EN ISO 15875-2
PB
EN ISO 15876-5
EN ISO 15876-2
PVC-C
EN ISO 15877-5
EN ISO 15877-2
Multilayer
EN ISO 21003-5
EN ISO 21003-2
PE-RT
EN ISO 22391-5
EN ISO 22391-2
PE
EN 12201-5
EN 12201-2
5.2.2 Internal pneumatic pressure test for fuel gas applications
Use the test method described in !EN 1254-20:2021+A1:2025, Clause 6" using the parameters
shown in Table 2.
Table 2— Internal pneumatic pressure test parameters for fuel gas applications
Free length of the pipe in 1st test 2nd test 3rd test Test duration at each
the test assembly pressure pressure pressure test pressure
mm mbar mbar bar min
MOP 5 MOP 1
200 22 110 10
5,5 3
5.2.3 Internal pneumatic pressure test for compressed air applications
Use the test method described in !EN 1254-20:2021+A1:2025, Clause 5", using the parameters
shown in Table 3, and then use the test method described in !EN 1254-20:2021+A1:2025,
Clause 6" using the parameters in Table 4.
Table 3 — Hydrostatic pressure test parameters
Free length of the pipe in the test Test pressure Test duration
assembly
mm bar min
100 1,5 × maximum operating pressure 10
Table 4 — Internal pneumatic pressure test parameters for compressed air
Free length of the pipe in the test Test pressure Test duration
assembly
mm bar min
100 1.1 × maximum operating pressure 10
5.3 Tightness
5.3.1 General tests
5.3.1.1 Integrity of fabricated fitting bodies or having an 'as cast' microstructure
Test, after the final machining operation, using the test method described in
!EN 1254-20:2021+A1:2025, Clause 7" using the parameters shown in Table 5.
Table 5 — Pneumatic pressure test parameters
Test pressure
Fitting type
bar
Cast or fabricated bodies 5 ± 0,5
5.3.1.2 Resistance to pull-out
Test in accordance with the method described in EN ISO 3501 using the parameters from the standards
shown in Table 6.
Table 6 — Pull-out test parameters
Pipe material Pull-out force
PP
EN ISO 15874-5
EN ISO 15874-2
PE-X
EN ISO 15875-5
EN ISO 15875-2
PB
EN ISO 15876-5
EN ISO 15876-2
PVC-C
EN ISO 15877-5
EN ISO 15877-2
Multilayer
EN ISO 21003-5
EN ISO 21003-2
PE-RT
EN ISO 22391-5
EN ISO 22391-2
PE
EN 12201-5
EN 12201-2
5.3.2 Tests for liquid applications
5.3.2.1 Leak tightness under vacuum
Use the test method described in EN ISO 13056 using the parameters from the standards shown in
Table 7.
Table 7 — Leak tightness under vacuum test parameters
Pipe material Test parameters
PP
EN ISO 15874-5
EN ISO 15874-2
PE-X
EN ISO 15875-5
EN ISO 15875-2
PB
EN ISO 15876-5
EN ISO 15876-2
PVC
EN ISO 15877-5
EN ISO 15877-2
Multilayer
EN ISO 21003-5
EN ISO 21003-2
PE-RT
EN ISO 22391-5
EN ISO 22391-2
PE
EN 12201-5
EN 12201-2
5.3.2.2 Leak tightness under temperature cycling
Use the test method described in EN ISO 19893 for the design pressure p declared by the plastics or
D
multilayer pipe manufacturer using the parameters shown in Table 8.
Table 8 — Leak tightness under temperature cycling test parameters
Pipe material Test parameters
PP
EN ISO 15874-5
EN ISO 15874-2
PE-X
EN ISO 15875-5
EN ISO 15875-2
PB
EN ISO 15876-5
EN ISO 15876-2
PVC
EN ISO 15877-5
EN ISO 15877-2
Multilayer
EN ISO 21003-5
EN ISO 21003-2
PE-RT
EN ISO 22391-5
EN ISO 22391-2
For materials or applications above ambient temperature not covered by Table 8, use the test method
described in !EN 1254-20:2021+A1:2025, Clause 12" using the parameters shown in Table 9.
Table 9 — Test parameters for resistance to thermal cycling
Fitting Water inlet Test Flow Test Test
size temperature pressure rate duration cycles
mm hot °C cold °C bar m/s min
(15 ± 1) hot,
10 to 63 5 000
(15 ± 1) cold
93 ± 2 20 ± 5 10 ± 1 ≥ 0,5
(30 ± 2) hot,
> 63 2 500
(30 ± 2) cold
5.3.2.3 Leak tightness under internal hydrostatic pressure while subjected to bending
Test in accordance with the method described in EN ISO 3503 using the parameters from the standards
shown in Table 10.
Table 10 — Test parameters for leak tightness under internal hydrostatic pressure while
subjected to bending
Pipe material Test parameters
PP
EN ISO 15874-5
EN ISO 15874-2
PE-X
EN ISO 15875-5
EN ISO 15875-2
PB
EN ISO 15876-5
EN ISO 15876-2
PVC-C
EN ISO 15877-5
EN ISO 15877-2
Multilayer
EN ISO 21003-5
EN ISO 21003-2
PE-RT
EN ISO 22391-5
EN ISO 22391-2
PE
EN 12201-5
EN 12201-2
5.3.2.4 Leak before press
Use the test method described in !EN 1254-20:2021+A1:2025, Clause 14" and test using water.
5.3.3 Tests for gas applications
5.3.3.1 Leak tightness under temperature cycling
Use the test method described in !EN 1254-20:2021+A1:2025, Clause 13" using the parameters
shown in Table 11. Then pressure test using the method described in 5.2.2.
Table 11 — Resistance to operating temperature variation: test parameters
Free length of pipe in test assembly
mm
5.3.3.2 Leak before press
Use the test method described in !EN 1254-20:2021+A1:2025, Clause 14" and test using air or
inert gas.
5.4 Durability
5.4.1 Durability of internal pressure: Resistance to stress corrosion
Use the test method described in !EN 1254-20:2021+A1:2025, Clause 15".
5.4.2 Durability of tightness
5.4.2.1 Resistance to dezincification
Use the test method described in !EN 1254-20:2021+A1:2025, Clause 17".
5.4.2.2 Resistance to pressure cycling for liquid applications
Use the test method described in EN ISO 19892 using the parameters from the standards shown in
Table 12. Then pressure test using test method described in 5.2.1.
Table 12 — Resistance to pressure cycling test parameters
Pipe material Test parameters
PP
EN ISO 15874-5
EN ISO 15874-2
PE-X
EN ISO 15875-5
EN ISO 15875-2
PB
EN ISO 15876-5
EN ISO 15876-2
PVC-C
EN ISO 15877-5
EN ISO 15877-2
Multilayer
EN ISO 21003-5
EN ISO 21003-2
PE-RT
EN ISO 22391-5
EN ISO 22391-2
5.4.3 Durability of resistance to high temperature (for heating networks)
In order to demonstrate durability for long-term applications in water, elastomers used for sealing
elements shall be tested in accordance with EN 681-1:1996, Annex B (compression set test in hot
distilled water at 110 °C) for a test duration of 1 000 h or 3 000 h or 10 000 h. The result shall be quoted
alongside the selected test period for example “35 % @ 3 000 h”.
NOTE The test duration is selected by the manufacturer from the 3 periods stated in 5.4.3.
5.5 Wall thickness at threaded portions of adaptor fittings
5.5.1 Type testing
The wall thickness shall be measured with a special micrometer or special purpose gauge, or the fitting
shall be sectioned and the wall thickness assessed with a calliper or equivalent instrument. The
accuracy of the measuring instrument shall be at least one decimal greater than the value specified in
!EN 1254-20:2021+A1:2025, 4.1" for that diameter. The wall thickness shall be measured at three
or more discrete places and efforts shall be made to find the minimum.
5.5.2 FPC testing
The wall thickness shall be measured as per 5.5.1 or with a special purpose gauge. The accuracy of the
measuri
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