Copper and copper alloys - Plumbing fittings - Part 1: Capillary fittings for soldering or brazing to copper tubes

This document specifies product characteristics, assessment methods, compliance criteria of the test results and a designation system for fittings with ends for capillary soldering or capillary brazing for connecting with copper tubes e.g. EN 1057, EN 13348, EN 13349, EN 12735-1, EN 12735-2 etc. For the purposes of joining copper tubes, the fitting ends have a nominal diameter from 6 mm to 108 mm. These fitting ends exist in three forms: end feed fittings, integral solder and integral brazing ring fitting ends. The fittings are designed for a service lifetime up to fifty years.
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.
The capillary fittings for soldering or brazing to copper tubes are used with solder alloys in accordance with alloys specified in EN ISO 9453 and brazing alloys in accordance with alloys specified in EN ISO 17672.
Adaptor fittings for use with copper tubes may combine capillary soldering or capillary brazing ends with fitting ends defined in the other parts of EN 1254.
Capillary fittings for soldering or brazing may also have flanged end connections according to EN 1092-3.
Capillary fittings for soldering or brazing 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;
- refrigeration systems;
- 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;
- gas line systems with an operating pressure exceeding 0,5 bar for industrial installations and exceeding 5 bar for industrial and non-industrial installations according to EN 15001-1;
- compressed air systems;
- medical gas systems according to EN ISO 7396;
- refrigeration systems.

Kupfer und Kupferlegierungen - Fittings - Teil 1: Kapillarlötfittings für Kupferrohre (Weich- und Hartlöten)

Dieses Dokument legt Produkteigenschaften, Bewertungsverfahren, Übereinstimmungskriterien der Prüfergebnisse und ein Bezeichnungssystem für Kapillarfittings zum Weich- bzw. Hartlöten von Kupferrohren fest, z. B. EN 1057, EN 13348, EN 13349, EN 12735 1, EN 12735 2 usw. Zum Verbinden von Kupferrohren haben die Fittingenden einen Nenndurchmesser von 6 mm bis 108 mm. Diese Fittingenden gibt es in drei Formen: Lötfittings, Fittings mit integriertem Weichlotring und Fittings mit integriertem Hartlötring. Die Fittings sind für eine Lebensdauer von bis zu fünfzig Jahren ausgelegt.
Die Fittings werden bis zu den in Anhang A angegebenen Betriebstemperaturen und entsprechenden maximalen Betriebsdrücken eingesetzt.
Dieses Dokument ist anzuwenden für Fittings aus Kupferlegierungen. Eine nicht vollständige Liste dieser Kupfer¬legierungen ist in CEN/TS 13388 enthalten.
Die Kapillarfittings zum Weich- bzw. Hartlöten von Kupferrohren werden mit Weichloten nach den in EN ISO 9453 spezifizierten Legierungen und Hartloten nach den in EN ISO 17672 spezifizierten Legierungen verwendet.
Übergangsfittings für Kupferrohre dürfen Kapillarlötenden zum Weich- bzw. Hartlöten mit in den anderen Teilen der EN 1254 definierten Fittingenden kombinieren.
Kapillarfittings zum Weich- bzw. Hartlöten dürfen auch Flanschendanschlüsse nach EN 1092 3 aufweisen.
Kapillarfittings zum Weich- bzw. Hartlöten dürfen auch galvanische oder andere dekorative Oberflächenüberzüge aufweisen.
Fittings können durch maschinelles Bearbeiten, Umformen, Gießen oder Fügen von Vormaterial hergestellt werden.
Produkte, die unter dieses Dokument fallen, 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;
—   Kältetechnik;
—   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;
—   Gas-Leitungsanlagen mit einem Betriebsdruck größer 0,5 bar für industrielle Installationen und größer 5 bar für industrielle und nicht-industrielle Installationen nach EN 15001 1;
—   Druckluftsysteme;
—   Systeme für medizinische Gase nach EN ISO 7396;
—   Kältetechnik.

Cuivre et alliages de cuivre - Raccords - Partie 1 : Raccords à braser par capillarité pour tubes en cuivre

Le présent document spécifie les caractéristiques de produits, les méthodes d'évaluation, les critères de
conformité des résultats d'essais et un système de désignation pour les raccords à extrémités à braser
(brasage tendre ou fort) par capillarité pour le raccordement de tubes en cuivre conformes, par exemple,
aux EN 1057, EN 13348, EN 13349, EN 12735-1, EN 12735-2 etc. Pour l'assemblage de tubes en cuivre,
les extrémités des raccords ont un diamètre nominal compris entre 6 mm et 108 mm. Ces extrémités de
raccords existent sous trois formes : raccords d'alimentation d’extrémité, raccords à anneau de brasure
tendre incorporé, et raccords à anneau de brasure forte incorporé. Les raccords sont conçus pour une
durée de vie en service supérieure à cinquante ans.
Les raccords sont utilisés jusqu'aux températures de service et aux pressions maximales de service
correspondantes indiquées en 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 à braser (brasage tendre ou fort) par capillarité pour tubes en cuivre sont utilisés avec des
alliages de brasage tendre conformément aux alliages spécifiés dans l’EN ISO 9453 et des alliages de
brasage fort conformément aux alliages spécifiés dans l’EN ISO 17672.
Les raccords adaptateurs utilisés avec des tubes en cuivre peuvent combiner des extrémités à braser
(brasage tendre ou fort) par capillarité avec des extrémités définies dans les autres parties de l’EN 1254.
Les raccords à braser (brasage tendre ou fort) par capillarité peuvent également comporter des
raccordements à brides conformément à l’EN 1092-3.
Les raccords à braser (brasage tendre ou fort) par capillarité 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 :
- eau chaude, eau froide ou eau chaude et 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 réfrigération ;
- les systèmes d'approvisionnement des points de consommation en combustibles liquides
conformes à 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 lignes de gaz avec une pression de service supérieure à 0,5 bar pour les installations
industrielles et supérieure à 5 bar pour les installations industrielles et non industrielles
conformes à l’EN 15001-1 ;
- les systèmes d’air comprimé ;
- les systèmes de distribution de gaz médicaux conformes à l’EN ISO 7396 ;
- les systèmes de réfrigération.

Baker in bakrove zlitine - Fitingi - 1. del: Fitingi za kapilarno mehko in trdo lotanje na bakrene cevi

General Information

Status
Published
Publication Date
25-May-2021
Withdrawal Date
29-Nov-2021
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
26-May-2021
Due Date
26-Nov-2020
Completion Date
26-May-2021

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Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 1254-1:2021
01-julij-2021
Nadomešča:
SIST EN 1254-1:1999
Baker in bakrove zlitine - Fitingi - 1. del: Fitingi za kapilarno mehko in trdo lotanje
na bakrene cevi
Copper and copper alloys - Plumbing fittings - Part 1: Capillary fittings for soldering or
brazing to copper tubes
Kupfer und Kupferlegierungen - Fittings - Teil 1: Weich- und Kapillarlötfittings für
Kupferrohre (Weich- und Hartlöten)
Cuivre et alliages de cuivre - Raccords - Partie 1 : Raccords à braser par capillarité pour
tubes en cuivre
Ta slovenski standard je istoveten z: EN 1254-1:2021
ICS:
23.040.40 Kovinski fitingi Metal fittings
77.150.30 Bakreni izdelki Copper products
SIST EN 1254-1:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 1254-1:2021

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SIST EN 1254-1:2021


EN 1254-1
EUROPEAN STANDARD

NORME EUROPÉENNE

May 2021
EUROPÄISCHE NORM
ICS 23.040.40 Supersedes EN 1254-1:1998
English Version

Copper and copper alloys - Plumbing fittings - Part 1:
Capillary fittings for soldering or brazing to copper tubes
Cuivre et alliages de cuivre - Raccords - Partie 1 : Kupfer und Kupferlegierungen - Fittings - Teil 1:
Raccords à braser par capillarité pour tubes en cuivre Weich- und Hartkapillarlötfittings für Kupferrohre
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 1254-1:2021 E
worldwide for CEN national Members.

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SIST EN 1254-1:2021
EN 1254-1:2021 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 7
3 Terms and definitions . 7
4 Product characteristics . 8
4.1 Internal pressure . 8
4.2 Tightness . 8
4.3 Release of dangerous substances . 8
4.4 Durability . 8
4.5 Dimensional tolerances of diameters to achieve reliable capillary flow . 9
4.6 Wall thickness for ends for capillary soldering or capillary brazing to copper tubes . 11
4.7 Wall thickness at threaded portions of adaptor fittings . 13
4.8 Dimensions of tail pipe ends for swivel fittings . 13
4.9 Dimensions of gas union connectors . 13
4.10 Threaded end dimensions . 13
4.11 Other adapter ends (not defined in EN 1254-20:2021) . 13
4.12 Length of engagement . 13
4.13 Bore dimensions . 16
4.14 Tube abutment . 16
4.15 Alignment of the fitting ends . 16
4.16 Shapes for tightening systems . 16
4.17 Surface condition . 16
4.18 Surface cleanliness for medical gases . 17
4.19 Plated or coated surfaces . 17
5 Testing, assessment and sampling methods . 17
5.1 General . 17
5.2 Internal pressure . 17
5.3 Tightness: Integrity of fabricated fitting bodies or having an 'as cast' microstructure . 18
5.4 Durability . 18
5.5 Dimensional tolerances of diameters . 18
5.6 Wall thickness for ends for capillary soldering or capillary brazing to copper tubes . 18
5.7 Wall thickness at threaded portions of adaptor fittings . 19
5.8 Dimensions of tail pipe ends for swivel fittings . 19
5.9 Dimensions of gas union connectors . 19
5.10 Threaded end dimensions . 19
5.11 Length of engagement . 19
5.12 Bore dimension . 19
5.13 Alignment of the fitting ends . 20
6 Evaluation of conformity . 20
6.1 General . 20
6.2 Type testing . 20
6.3 Factory production control (FPC) . 22
7 Designation. 25
2

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SIST EN 1254-1:2021
EN 1254-1:2021 (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 corresponding maximum operating
pressures . 26
Bibliography . 27

3

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SIST EN 1254-1:2021
EN 1254-1:2021 (E)
European foreword
This document (EN 1254-1:2021) 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 1254-1:1998.
The main changes compared to EN 1254-1:1998 are:
— separation of test methods into part 20.
This part of the standard (EN 1254-1) 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.
4

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SIST EN 1254-1:2021
EN 1254-1:2021 (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.
5

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SIST EN 1254-1:2021
EN 1254-1:2021 (E)
1 Scope
This document specifies product characteristics, assessment methods, compliance criteria of the test
results and a designation system for fittings with ends for capillary soldering or capillary brazing for
connecting with copper tubes e.g. EN 1057, EN 13348, EN 13349, EN 12735-1, EN 12735-2 etc. For the
purposes of joining copper tubes, the fitting ends have a nominal diameter from 6 mm to 108 mm.
These fitting ends exist in three forms: end feed fittings, integral solder and integral brazing ring fitting
ends. The fittings are designed for a service lifetime up to fifty years.
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.
The capillary fittings for soldering or brazing to copper tubes are used with solder alloys in accordance
with alloys specified in EN ISO 9453 and brazing alloys in accordance with alloys specified in
EN ISO 17672.
Adaptor fittings for use with copper tubes may combine capillary soldering or capillary brazing ends
with fitting ends defined in the other parts of EN 1254.
Capillary fittings for soldering or brazing may also have flanged end connections according to
EN 1092-3.
Capillary fittings for soldering or brazing 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;
— refrigeration systems;
— 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;
— gas line systems with an operating pressure exceeding 0,5 bar for industrial installations and
exceeding 5 bar for industrial and non-industrial installations according to EN 15001-1;
— compressed air systems;
— medical gas systems according to EN ISO 7396;
— refrigeration systems.
6

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SIST EN 1254-1:2021
EN 1254-1:2021 (E)
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 723, Copper and copper alloys — Combustion method for determination of the carbon content on the
inner surface of copper tubes or fittings
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 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 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 9453, Soft solder alloys — Chemical compositions and forms (ISO 9453)
EN ISO 17672, Brazing — Filler metals (ISO 17672)
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
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
7

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SIST EN 1254-1:2021
EN 1254-1:2021 (E)
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 Leak tightness under internal hydrostatic pressure
Fittings assessed as indicated in 4.1 are considered to be leak tight under internal hydrostatic pressure.
4.2.2 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 fitting bodies shall show no visual indication of leakage.
4.3 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
http://ec.europa.eu/growth/tools-
available at the Construction website on EUROPA accessed through:
databases/cp-ds.
4.4 Durability
4.4.1 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
10
HV ≤ 134 measured according to EN ISO 6507-1.
5
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.
4.4.2 Durability of tightness
4.4.2.1 Residual carbon contamination in the bore
4.4.2.1.1 General
Applies only to copper fittings and does not apply to copper alloy fittings.
4.4.2.1.2 Carbon film
When tested according to 5.4.2.1 there shall not be any visible carbon film.
8

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SIST EN 1254-1:2021
EN 1254-1:2021 (E)
4.4.2.1.3 Total carbon
When tested according to 5.4.2.2 the maximum total carbon level on internal surfaces shall not exceed
2
1,0 mg/dm .
4.4.2.2 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 do not need to be
tested.
Representative material samples, prior to machining, shall be tested. When tested according to 5.4.2.3,
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.
If the user needs to heat a dezincification resistant alloy fitting to a temperature exceeding 550 °C for
example for brazing, advice should be sought from the manufacturer.
4.5 Dimensional tolerances of diameters to achieve reliable capillary flow
In order to achieve the capillary flow of a solder or brazing alloy when making a connection, the
dimensions of a socket or male end shall be tightly controlled.
When assessed according to the method specified in 5.5, the diameter shall be within the tolerances
expressed in Table 1 for the relevant diameters.
9

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SIST EN 1254-1:2021
EN 1254-1:2021 (E)
Table 1 — Tolerances on the nominal diameter
Values in millimetres
a
Nominal diameter Tolerances on the mean diameter  Resulting diametrical
D with respect to the nominal diameter D difference
Outside diameter Inside diameter max. min.
of male end of socket
6
8
10
12
+0,04 +0,15
0,20 0,02
14
−0,05 +0,06
14,7
15
16
18
21
22
+0,05 +0,18
25 0,24 0,02
−0,06 +0,07
27,4
28
b
34
b
35
b
40
+0,06 +0,23
b
0,30 0,03
40,5
−0,07 +0,09
b
42
b
53,6
b
54
b
64
b
66,7
b
70
b
76,1 +0,07 +0,33
0,41 0,03
b
80 −0,08 +0,10
b
88,9
b
106
b
108
a
Arithmetical mean of two diameters at right angles in a cross-section taken anywhere on the length of the
socket or of the male end except under indented marking or in the solder or brazing alloy groove.
b
The soldering or brazing of tubes and fittings for these diameters requires more skilled techniques (further
information is available in EN 1254-20:2021, Annex A).
10

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SIST EN 1254-1:2021
EN 1254-1:2021 (E)
4.6 Wall thickness for ends for capillary soldering or capillary brazing to copper tubes
When measured according to the method specified in 5.6, the minimum wall thickness shall be as
expressed in Table 2 for the relevant diameters and different forms of the material.
The minimum wall thickness requirements do not apply under embossed marking on the socket end.
In the case of integral solder or brazing ring fittings where a groove is made within the soldering or
brazing length, the minimum wall thickness measured within or immediately adjacent the solder
groove (see Figure 1) shall be in accordance with dimension e' in Table 2.

end feed fitting integral solder or brazing ring fitting integral solder or brazing ring
fitting
Key
D nominal diameter
e minimum wall thickness
e' minimum wall thickness within or immediately adjacent the solder or brazing ring groove
Figure 1 — Minimum wall thickness
11

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SIST EN 1254-1:2021
EN 1254-1:2021 (E)
Table 2 — Minimum wall thickness
Dimensions in millimetres
Nominal Minimum wall thickness
diameter
 Wrought coppers Wrought copper alloys Cast coppers and copper
and continuous cast bar alloys
D e e' e e' e e'
6
8 1,0 0,55 1,0 0,65
10 0,6 0,54
12
1,1 0,60 1,1 0,71
14
14,7
15 0,7 0,63 1,2 0,66 1,2 0,78
16
18 0,8 0,72
1,4 0,91
21
1,4 0,77
22 1,5 0,97
25 0,9 0,81
1,6 1,04
27,4
1,5 0,82
28
34 1,8 1,17
1,0 0,90 1,6 0,88
35
40
40,5 1,1 0,99 1,8 0,99 2,0 1,30
42
53,6
1,2 1,08 1,9 1,04 2,3 1,49
54
64
2,0 1,10 2,4 1,56
66,7 1,4 1,26
70 2,3 1,26 2,6 1,69
76,1 1,6 1,44 2,6 1,43 2,8 1,82
80 2,8 1,54 2,9 1,88
1,8 1,62
88,9 2,9 1,59 3,1 2,01
106
2,1 1,89 3,3 1,80 3,5 2,27
108
12

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SIST EN 1254-1:2021
EN 1254-1:2021 (E)
4.7 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 5.7 the minimum wall thickness at the interface
thread shall be as expressed in EN 1254-20:2021, 4.1 for the relevant diameters.
4.8 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 5.8 the dimensions shall be as expressed in
EN 1254-20:2021, 4.2 for the thread size.
4.9 Dimensions of gas union connectors
This requirement only applies to fittings with gas union connectors.
When assessed according to the method specified in 5.9 the dimensions shall be as expressed in
EN 1254-20:2021, 4.3 for corresponding nominal size.
4.10 Threaded end dimensions
This requirement only applies to fitting bodies with threaded ends.
When assessed according to the method specified in 5.10 the thread shall be in accordance with
EN 1254-20:2021, 4.4.
4.11 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.
4.12 Length of engagement
When assessed according to the method specified in 5.11, the minimum length of engagement shall be
as expressed in Table 3 for the relevant diameters.
The length L for integral solder or brazing ring socket ends shall not include the width of the solder or
1
brazing alloy groove (see Figure 2b). The actual groove shape is un-important providing that it contains
sufficient solder or braze to produce a sound joint on assembly with the correct size of tube.
Male ends intended for use with integral ring sockets shall include an allowance for the width of the
solder or brazing alloy groove.
When the male end diameter is less than the fitting diameter (see Figure 3), the length of the male end
shall be increased to L (see Table 3).
2

13

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SIST EN 1254-1:2021
EN 1254-1:2021 (E)


 L = L + L
1 A Ā
end feed fitting integral solder or brazing ring
fitting
Key
D nominal diameter
L length of the socket end
1
L length from the groove to the inner end of the socket end
A
LĀ length from the groove to the outer end of the socket end
Figure 2 — Socket

Key
D nominal diameter
L1 length of the male when the male end diameter is bigger than the fitting diameter
L length of the male when the male end diameter is less than the fitting diameter
2
Figure 3 — Male end
14

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SIST EN 1254-1:2021
EN 1254-1:2021 (E)
Table 3 — Minimum lengths of engagement
Dimensions in millimetres
Nominal diameter Length of engagement
D
L L
1 2
6 5,8 7,8
8 6,8 8,8
10 7,8 9,8
12 8,6 10,6
14 10,6 12,6
14,7 10,6 12,6
15 10,6 12,6
16 10,6 12,6
18 12,6 14,6
21 15,4 17,4
22 15,4 17,4
25 16,4 18,4
27,4 18,4 20,4
28 18,4 20,4
34 23 25
35 23 25
40 27 29
40,5 27 29
42 27 29
53,6 32 34
54 32 34
64 32,5 34,5
66,7 33,5 36,5
70 33,5 36,5
76,1 33,5 36,5
80 35,5 38,5
88,9 37,5 40,5
106 47,5 51,5
108 47,5 51,5
15

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SIST EN 1254-1:2021
EN 1254-1:2021 (E)
4.13 Bore dimensions
To minimize flow resistance, minimum bore dimensions are required.
When assessed according to the test method in 5.12, the minimum bore of the fitting shall be greater or
equal to the values expressed in EN 1254-20:2021, 4.5, Table 9, for the relevant nominal diameter.
For unequal-ended or adaptor fittings, the smallest diameter shall apply provided that this diameter
does not restrict other outlets.
Bores at threaded portions of fittings shall not restrict other outlets.
4.14 Tube abutment
This requirement does not apply to threaded ends.
Fitting ends are usually manufactured with an abutment to limit tube insertion (see Figure 4) and to
ensure that the minimum length of engagement between tube and fitting is satisfied.
Fittings may be produced for s
...

SLOVENSKI STANDARD
oSIST prEN 1254-1:2019
01-september-2019
Baker in bakrove zlitine - Fitingi - 1. del: Fitingi za kapilarno mehko in trdo lotanje
na bakrene cevi
Copper and copper alloys - Plumbing fittings - Part 1: Capillary fittings for soldering or
brazing to copper tubes
Kupfer und Kupferlegierungen - Fittings - Teil 1: Weich- und Hartkapillarlötfittings für
Kupferrohre
Cuivre et alliages de cuivre - Raccords - Partie 1 : Raccords à braser par capillarité pour
tubes en cuivre
Ta slovenski standard je istoveten z: prEN 1254-1
ICS:
23.040.40 Kovinski fitingi Metal fittings
77.150.30 Bakreni izdelki Copper products
oSIST prEN 1254-1:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 1254-1:2019

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oSIST prEN 1254-1:2019


DRAFT
EUROPEAN STANDARD
prEN 1254-1
NORME EUROPÉENNE

EUROPÄISCHE NORM

June 2019
ICS 23.040.40 Will supersede EN 1254-1:1998
English Version

Copper and copper alloys - Plumbing fittings - Part 1:
Capillary fittings for soldering or brazing to copper tubes
Cuivre et alliages de cuivre - Raccords - Partie 1 : Kupfer und Kupferlegierungen - Fittings - Teil 1:
Raccords à braser par capillarité pour tubes en cuivre Weich- und Hartkapillarlötfittings für Kupferrohre
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, 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 1254-1:2019 E
worldwide for CEN national Members.

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oSIST prEN 1254-1:2019
prEN 1254-1:2019 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 7
3 Terms and definitions . 8
4 Product characteristics . 8
4.1 Internal pressure . 8
4.2 Tightness . 8
4.2.1 Leak tightness under internal hydrostatic pressure . 8
4.2.2 Integrity of fabricated fitting bodies or having an 'as cast' microstructure . 8
4.3 Release of dangerous substances . 8
4.4 Durability . 8
4.4.1 Durability of internal pressure . 8
4.4.2 Durability of tightness . 9
4.5 Dimensional tolerances of diameters to achieve reliable capillary flow . 9
4.6 Wall thickness for ends for capillary soldering or capillary brazing to copper tubes . 11
4.7 Wall thickness at threaded portions of adaptor fittings . 13
4.8 Dimensions of tail pipe ends for swivel fittings . 13
4.9 Dimensions of gas union connectors . 13
4.10 Threaded end dimensions . 13
4.11 Other adapter ends (not defined in prEN 1254-20:2019) . 13
4.12 Length of engagement . 14
4.13 Bore dimensions . 16
4.14 Tube abutment . 18
4.15 Alignment of the fitting ends . 18
4.16 Shapes for tightening systems . 19
4.17 Surface condition . 19
4.18 Surface cleanliness for medical gases . 19
4.19 Plated or coated surfaces . 19
5 Testing, assessment and sampling methods . 19
5.1 General . 19
5.1.1 Preparation of fittings for testing. 19
5.1.2 Test temperature . 19
5.2 Internal pressure . 19
5.3 Tightness . 20
5.3.1 Integrity of fabricated fitting bodies or having an 'as cast' microstructure . 20
5.4 Durability . 20
5.4.1 Durability of internal pressure . 20
5.4.2 Durability of tightness . 20
5.5 Dimensional tolerances of diameters . 20
5.6 Wall thickness for ends for capillary soldering or capillary brazing to copper tubes . 21
5.7 Wall thickness at threaded portions of adaptor fittings . 21
5.7.1 Type testing . 21
5.7.2 FPC testing . 21
5.8 Dimensions of tail pipe ends for swivel fittings . 21
2

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oSIST prEN 1254-1:2019
prEN 1254-1:2019 (E)
5.9 Dimensions of gas union connectors . 21
5.9.1 Type testing . 21
5.9.2 FPC testing . 21
5.10 Threaded end dimensions . 21
5.11 Length of engagement . 21
5.12 Bore dimension . 21
5.13 Alignment of the fitting ends . 22
6 Assessment and verification of constancy of performance - AVCP . 22
6.1 General . 22
6.2 Type testing . 22
6.2.1 General . 22
6.2.2 Test samples, testing and compliance criteria . 23
6.2.3 Test reports . 25
6.3 Factory production control (FPC) . 25
6.3.1 General . 25
6.3.2 Requirements . 25
6.3.3 Product specific requirements . 28
6.3.4 Procedure for modifications . 29
6.3.5 One-off products, pre-production products (e.g. prototypes) and products produced
in very low quantity . 29
7 Classification and designation . 30
8 Marking, labelling and packaging . 30
8.1 General . 30
8.2 Dezincification resistant copper zinc alloys . 31
Annex A (normative) Operating temperatures and corresponding maximum operating
pressures . 32
Bibliography . 33

3

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oSIST prEN 1254-1:2019
prEN 1254-1:2019 (E)
European foreword
This document (prEN 1254-1:2019) has been prepared by Technical Committee CEN/TC 133 “Copper
and copper alloys”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1254-1:1998.
This part of the standard (EN 1254-1) 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 EN 1254-1:1998 are:
— separation of test methods into part 20.

4

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oSIST prEN 1254-1:2019
prEN 1254-1:2019 (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.

5

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oSIST prEN 1254-1:2019
prEN 1254-1:2019 (E)
1 Scope
This document specifies product characteristics, assessment methods, compliance criteria of the test
results and a designation system for fittings with ends for capillary soldering or capillary brazing for
connecting with copper tubes e.g. EN 1057, EN 13348, EN 13349, EN 12735-1, EN 12735-2 etc. For the
purposes of joining copper tubes, the fitting ends have a size range from 6 mm to 108 mm. These fitting
ends exist in three forms: end feed fittings and integral solder and integral brazing ring fitting ends. The
fittings are designed for a service lifetime up to fifty years.
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.
The capillary fittings for soldering or brazing to copper tubes are used with solder alloys in accordance
with alloys specified in EN ISO 9453 and brazing alloys in accordance with alloys specified in
EN ISO 17672.
Adaptor fittings for use with copper tubes may combine capillary soldering or capillary brazing ends
with fitting ends defined in the other parts of EN 1254.
Capillary fittings for soldering or brazing may also have flanged end connections according to
EN 1092-3.
Capillary fittings for soldering or brazing 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:
a) 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;
— refrigeration systems;
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;
— medical gas systems according to EN ISO 7396;
— refrigeration systems.
6

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oSIST prEN 1254-1:2019
prEN 1254-1:2019 (E)
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 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
EN 1775, Gas supply — Gas pipework for buildings — Maximum operating pressure less than or equal to 5
bar — Functional recommendations
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 12735-1, Copper and copper alloys — Seamless, round tubes for air conditioning and refrigeration -
Part 1: Tubes for piping systems
EN 12735-2, Copper and copper alloys — Seamless, round tubes for air conditioning and refrigeration —
Part 2: Tubes for equipment
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 13348, Copper and copper alloys — Seamless, round copper tubes for medical gases or vacuum
EN 13349, Copper and copper alloys — Pre-insulated copper tubes with solid covering
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 7396, Medical gas pipeline systems
EN ISO 9453, Soft solder alloys — Chemical compositions and forms (ISO 9453)
EN ISO 17672, Brazing — Filler metals (ISO 17672)
7

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oSIST prEN 1254-1:2019
prEN 1254-1:2019 (E)
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
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.
4.2 Tightness
4.2.1 Leak tightness under internal hydrostatic pressure
Fittings assessed as indicated in 4.1 are considered to be leak tight under internal hydrostatic pressure.
4.2.2 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.
4.3 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.
4.4 Durability
4.4.1 Durability of internal pressure
4.4.1.1 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.
8

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oSIST prEN 1254-1:2019
prEN 1254-1:2019 (E)
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
10
HV ≤ 134 measured according to EN ISO 6507-1.
5
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.
4.4.2 Durability of tightness
4.4.2.1 Residual carbon contamination in the bore
Applies only to copper fittings and does not apply to copper alloy fittings.
4.4.2.1.1 Carbon film
When tested according to 5.4.2.1 there shall not be any visible carbon film.
4.4.2.1.2 Total carbon
When tested according to 5.4.2.2 the maximum total carbon level on internal surfaces shall not exceed
2
1,0 mg/dm .
4.4.2.2 Resistance to dezincification
Does not apply to fittings for gas applications.
The resistance to dezincification of alloy fittings can be obtained by the correct material selection and
processing of that material.
Alloys containing 10 % 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 5.4.2.3,
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 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 standard.
If the user needs to heat a dezincification resistant alloy fitting to a temperature exceeding 550 °C for
example for brazing, advice should be sought from the manufacturer.
4.5 Dimensional tolerances of diameters to achieve reliable capillary flow
In order to achieve the capillary flow of a solder or brazing alloy when making a connection, the
dimensions of a socket or male end shall be tightly controlled.
When assessed according to the method specified in 5.5, the diameter shall be within the tolerances
expressed in Table 1 for the relevant diameters.
9

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oSIST prEN 1254-1:2019
prEN 1254-1:2019 (E)
Table 1 — Tolerances on the nominal diameter
Values in millimetres
a
Nominal diameter Tolerances on the mean diameter  Resulting diametrical
D with respect to the nominal diameter D difference
Outside diameter Inside diameter max. min.
of male end of socket
6
8
10
12
+0,04 +0,15
14 0,20 0,02
−0,05 +0,06
14,7
15
16
18
21
22
+0,05 +0,18
25 0,24 0,02
−0,06 +0,07
27,4
28
b
34
b
35
b
40
+0,06 +0,23
b
40,5 0,30 0,03
−0,07 +0,09
b
42
b
53,6
b
54
b
64
b
66,7
b
70
b
76,1
+0,07 +0,33
0,41 0,03
b
−0,08 +0,10
80
b
88,9
b
106
b
108
10

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oSIST prEN 1254-1:2019
prEN 1254-1:2019 (E)
a
Nominal diameter Tolerances on the mean diameter  Resulting diametrical
D with respect to the nominal diameter D difference
Outside diameter Inside diameter max. min.
of male end of socket
a
Arithmetical mean of two diameters at right angles in a cross-section taken anywhere on the length of the
socket or of the male end except under indented marking or in the solder or brazing alloy groove.
b
The soldering or brazing of tubes and fittings for these diameters requires more skilled techniques
(further information is available in prEN 1254-20:2019, Annex A).

4.6 Wall thickness for ends for capillary soldering or capillary brazing to copper tubes
When measured according to the method specified in 5.6, the minimum wall thickness shall be as
expressed in Table 2 for the relevant diameters and different forms of the material.
The minimum wall thickness requirements do not apply under embossed marking on the socket end.
In the case of integral solder or brazing ring fittings where a groove is made within the soldering or
brazing length, the minimum wall thickness measured within or immediately adjacent the solder
groove (see Figure 1) shall be in accordance with dimension e' in Table 2.

end feed fitting integral solder or brazing ring integral solder or brazing
fitting ring fitting
Key
D nominal diameter
e minimum wall thickness
e' minimum wall thickness within or immediately adjacent the solder or brazing ring groove
Figure 1 — Minimum wall thickness

11

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oSIST prEN 1254-1:2019
prEN 1254-1:2019 (E)
Table 2 — Minimum wall thickness
Dimensions in millimetres
Nominal Minimum wall thickness
diameter
 Wrought coppers Wrought copper alloys Cast coppers and copper
and continuous cast bar alloys
D e e' E e' e e'
6 0,6 0,54 1,0 0,55 1,0 0,65
8 0,6 0,54 1,0 0,55 1,0 0,65
10 0,6 0,54 1,0 0,55 1,0 0,65
12 0,6 0,54 1,1 0,60 1,1 0,71
14 0,6 0,54 1,1 0,60 1,1 0,71
14,7 0,7 0,63 1,2 0,66 1,2 0,78
15 0,7 0,63 1,2 0,66 1,2 0,78
16 0,7 0,63 1,2 0,66 1,2 0,78
18 0,8 0,72 1,4 0,77 1,4 0,91
21 0,9 0,81 1,4 0,77 1,4 0,91
22 0,9 0,81 1,4 0,77 1,5 0,97
25 0,9 0,81 1,4 0,77 1,6 1,04
27,4 0,9 0,81 1,5 0,82 1,6 1,04
28 0,9 0,81 1,5 0,82 1,8 1,17
34 1,0 0,90 1,6 0,88 1,8 1,17
35 1,0 0,90 1,6 0,88 1,8 1,17
40 1,1 0,99 1,8 0,99 2,0 1,30
40,5 1,1 0,99 1,8 0,99 2,0 1,30
42 1,1 0,99 1,8 0,99 2,0 1,30
53,6 1,2 1,08 1,9 1,04 2,3 1,49
54 1,2 1,08 1,9 1,04 2,3 1,49
12

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oSIST prEN 1254-1:2019
prEN 1254-1:2019 (E)
Nominal Minimum wall thickness

diameter
 Wrought coppers Wrought copper alloys Cast coppers and copper
and continuous cast bar alloys
D e e' E e' e e'
64 1,4 1,26 2,0 1,10 2,4 1,56
66,7 1,4 1,26 2,0 1,10 2,4 1,56
70 1,4 1,26 2,3 1,26 2,6 1,69
76,1 1,6 1,44 2,6 1,43 2,8 1,82
80 1,8 1,62 2,8 1,54 2,9 1,88
88,9 1,8 1,62 2,9 1,59 3,1 2,01
106 2,1 1,89 3,3 1,80 3,5 2,27
108 2,1 1,89 3,3 1,80 3,5 2,27

4.7 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 5.7 the minimum wall thickness at the interface
thread shall be as expressed in prEN 1254-20:2019,
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Questions, Comments and Discussion

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