Copper and copper alloys - Plumbing fittings - Part 20: Definitions, thread dimensions, test methods, reference data and supporting information

This document contains definitions, thread dimension, reference data (minimum bore), supporting information (assembling instructions) and describes the test methods referenced by other parts of the EN 1254 series.
Thread dimensions comprise: wall thickness at threaded portions of fittings, dimensions of tail pipe ends for swivel fittings, dimensions of gas union connectors, thread dimensions and thread profile.
Test methods comprise: leak tightness under internal hydrostatic pressure, leak tightness under internal pneumatic pressure, resistance of joints to static flexural strength, resistance to pull out of joints, leak tightness of joints under vacuum, the resistance of joints to temperature cycling, resistance of joints with metallic tube to vibration, integrity of fabricated fitting bodies or having an 'as cast' microstructure, resistance to stress corrosion, detection of a carbon film on the surface of copper fittings, determination of mean depth of dezincification, resistance of joints to pressure cycling, disconnection and re-use, determining if the diameter and/or the length of engagement of a capillary end is/are within the specified tolerance, determining the minimum length of engagement of an integral solder or brazing ring socket having a formed groove.

Kupfer und Kupferlegierungen - Fittings - Teil 20: Definitionen, Gewindeabmessungen, Prüfverfahren, Referenzdaten und ergänzende Informationen

Dieses Dokument enthält Definitionen, Gewindeabmessungen, Referenzdaten (Mindest Durchgangsquer-schnitt), hilfreiche Informationen (Montageanweisungen) und beschreibt die in anderen Teilen der Normenreihe EN 1254 zitierten Prüfverfahren.
Gewindemaße umfassen: Wanddicke an Gewindeteilen der Fittings, Maße der Endrohranschlüsse für Schwenkfittings, Maße der Gas Verschraubungsanschlüsse, Gewindemaße und Gewindeprofil.
Prüfverfahren umfassen: Dichtheit unter hydrostatischem Innendruck, Dichtheit unter pneumatischem Innendruck, Beständigkeit von Rohrverbindungen gegen statische Biegebeanspruchung, Ausziehwiderstand von Rohrverbindungen, Vakuumdichtheit von Rohrverbindungen, Temperaturwechselbeständigkeit von Verbindungen, Schwingungsbeständigkeit von Verbindungen mit Metallrohren, Integrität der Fittingkörper mit Formgussgefüge bzw. der gefertigten Fittingkörper, Spannungsrisskorrosionsbeständigkeit, Auffinden eines Kohlenstoff Films auf der Oberfläche von Kupferfittings, Bestimmung der mittleren Entzinkungstiefe, Druckwechselbeständigkeit von Verbindungen, Lösen und Wiederverwenden, Bestimmung, ob der Durchmesser und/oder die Lötlänge eines Kapillarfittings innerhalb der festgelegten Toleranz liegt, Bestimmung der Mindest Lötlänge eines Innenlötendes mit integriertem Weich  bzw. Hartlötring und ausgeformter Nut.

Cuivre et alliages de cuivre - Raccords - Partie 20 : Définitions, dimensions de filetage, méthodes d'essai, données de référence et informations complémentaires

Le présent document contient les définitions, les dimensions du filetage, les données de référence (passage minimal), les informations supports (instructions d’assemblage) et décrit les méthodes d'essai citées en référence par d’autres parties de la série EN 1254.
Les dimensions du filetage comprennent : l’épaisseur de paroi au niveau des parties filetées des raccords, les dimensions des extrémités des tuyaux d’aspiration pour les raccords à écrou tournant, les dimensions des connecteurs de gaz, les dimensions du filetage et le profil du filetage.
Les méthodes d’essai comprennent : étanchéité sous pression hydrostatique interne, étanchéité sous pression pneumatique interne, résistance des raccordements à la flexion statique, résistance à la traction des raccordements, étanchéité des raccordements sous vide, résistance des raccordements aux cycles thermiques, résistance des raccordements avec tube métallique aux vibrations, intégrité des corps des raccords ayant une microstructure moulée ou mécanosoudés, résistance à la corrosion sous contrainte, détection d’un film de carbone sur la surface des raccords en cuivre, détermination de la profondeur moyenne de dézincification, résistance des raccordements aux cycles de pression, déconnexion et réutilisation, détermination si le diamètre et/ou la longueur de l’emboîtement d'une extrémité capillaire est/sont incluses dans les tolérances spécifiées, détermination de la longueur d’emboîtement minimale d’une emboîture à anneau de brasure (tendre ou forte) incorporé pourvue d'une rainure façonnée.

Baker in bakrove zlitine - Fitingi - 20. del: Definicije, mere navojev, preskusne metode, referenčni podatki in dodatne informacije

General Information

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

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SLOVENSKI STANDARD
SIST EN 1254-20:2021
01-julij-2021

Baker in bakrove zlitine - Fitingi - 20. del: Definicije, mere navojev, preskusne

metode, referenčni podatki in dodatne informacije

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

test methods, reference data and supporting information

Kupfer und Kupferlegierungen - Fittings - Teil 20: Definitionen, Gewindeabmessungen,

Prüfverfahren, Referenzdaten und ergänzende Informationen

Cuivre et alliages de cuivre - Raccords - Partie 20 : Définitions, dimensions de filetage,

méthodes d'essai, données de référence et informations complémentaires
Ta slovenski standard je istoveten z: EN 1254-20:2021
ICS:
23.040.40 Kovinski fitingi Metal fittings
77.150.30 Bakreni izdelki Copper products
SIST EN 1254-20:2021 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN 1254-20:2021
---------------------- Page: 2 ----------------------
SIST EN 1254-20:2021
EN 1254-20
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2021
EUROPÄISCHE NORM
ICS 23.040.40
English Version
Copper and copper alloys - Plumbing fittings - Part 20:
Definitions, thread dimensions, test methods, reference
data and supporting information

Cuivre et alliages de cuivre - Raccords - Partie 20 : Kupfer und Kupferlegierungen - Fittings - Teil 20:

Définitions, dimensions de filetage, méthodes d'essai, Definitionen, Gewindeabmessungen, Prüfverfahren,

données de référence et informations complémentaires Referenzdaten und ergänzende Informationen

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 1254-20:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 1254-20:2021
EN 1254-20:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 5

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

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

3 Terms and definitions ................................................................................................................................... 7

4 Thread dimensions ...................................................................................................................................... 10

4.1 Wall thickness at threaded portions of fittings ................................................................................. 10

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

4.3 Dimensions of gas union connectors..................................................................................................... 14

4.4 Threaded end dimensions ........................................................................................................................ 16

4.5 Minimum bore and cross-sectional area of fittings ......................................................................... 22

5 Test method for leak tightness under internal hydrostatic pressure....................................... 26

5.1 Introduction ................................................................................................................................................... 26

5.2 Principle .......................................................................................................................................................... 27

5.3 Apparatus ........................................................................................................................................................ 27

5.4 Test piece ........................................................................................................................................................ 27

5.5 Procedure ........................................................................................................................................................ 28

6 Test method for leak tightness under internal pneumatic pressure ........................................ 28

6.1 Introduction ................................................................................................................................................... 28

6.2 Principle .......................................................................................................................................................... 28

6.3 Apparatus ........................................................................................................................................................ 29

6.4 Test piece ........................................................................................................................................................ 29

6.5 Procedure ........................................................................................................................................................ 30

7 Integrity of fabricated fitting bodies or having an 'as cast' microstructure ........................... 31

7.1 Introduction ................................................................................................................................................... 31

7.2 Principle .......................................................................................................................................................... 31

7.3 Apparatus ........................................................................................................................................................ 31

7.4 Test piece ........................................................................................................................................................ 31

7.5 Procedure ........................................................................................................................................................ 32

8 Test method for resistance to pull out of joints to metallic tubes .............................................. 32

8.1 Introduction ................................................................................................................................................... 32

8.2 Principle .......................................................................................................................................................... 32

8.3 Apparatus ........................................................................................................................................................ 32

8.4 Test assembly ................................................................................................................................................ 33

8.5 Procedure ........................................................................................................................................................ 33

9 Test method for the resistance of joints with metallic tube to vibration ................................ 33

9.1 Introduction ................................................................................................................................................... 33

9.2 Principle .......................................................................................................................................................... 33

9.3 Apparatus ........................................................................................................................................................ 34

9.4 Test assembly ................................................................................................................................................ 34

9.5 Procedure ........................................................................................................................................................ 35

10 Test method for the resistance of joints to static flexural force ................................................. 35

10.1 Introduction ................................................................................................................................................... 35

10.2 Principle .......................................................................................................................................................... 35

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SIST EN 1254-20:2021
EN 1254-20:2021 (E)

10.3 Apparatus ........................................................................................................................................................ 35

10.4 Test piece ......................................................................................................................................................... 35

10.5 Procedure ........................................................................................................................................................ 36

11 Test method for leak tightness of joints under vacuum ................................................................. 37

11.1 Introduction .................................................................................................................................................... 37

11.2 Principle ........................................................................................................................................................... 37

11.3 Apparatus ........................................................................................................................................................ 37

11.4 Test piece ......................................................................................................................................................... 38

11.5 Procedure ........................................................................................................................................................ 38

12 Test method for the resistance of joints to temperature cycling (liquid applications) ...... 39

12.1 Introduction .................................................................................................................................................... 39

12.2 Principle ........................................................................................................................................................... 39

12.3 Apparatus ........................................................................................................................................................ 39

12.4 Test assembly ................................................................................................................................................. 39

12.5 Procedure ........................................................................................................................................................ 41

13 Test method for the resistance of joints to temperature cycling (fuel gas

applications) ................................................................................................................................................... 41

13.1 Introduction .................................................................................................................................................... 41

13.2 Principle ........................................................................................................................................................... 42

13.3 Apparatus ........................................................................................................................................................ 42

13.4 Test assembly ................................................................................................................................................. 42

13.5 Procedure ........................................................................................................................................................ 42

14 Method for detecting non-pressed fitting ends.................................................................................. 43

14.1 Introduction .................................................................................................................................................... 43

14.2 Principle ........................................................................................................................................................... 43

14.3 Apparatus ........................................................................................................................................................ 43

14.4 Test piece ......................................................................................................................................................... 44

14.5 Procedure ........................................................................................................................................................ 44

14.6 Results .............................................................................................................................................................. 44

15 Determination of resistance to stress corrosion ............................................................................... 45

15.1 Introduction .................................................................................................................................................... 45

15.2 Test piece ......................................................................................................................................................... 45

15.3 Procedure ........................................................................................................................................................ 45

15.4 Test report....................................................................................................................................................... 45

16 Test method for detection of a carbon film on the surface of copper fittings ......................... 45

16.1 Preparation of the test piece .................................................................................................................... 45

16.2 Procedure ........................................................................................................................................................ 45

16.3 Detection and assessment of films ......................................................................................................... 46

17 Determination of mean depth of dezincification .............................................................................. 46

17.1 Introduction .................................................................................................................................................... 46

17.2 Procedure ........................................................................................................................................................ 46

17.3 Expression of results ................................................................................................................................... 46

18 Test method for the resistance of joints to pressure cycling ........................................................ 47

18.1 Introduction .................................................................................................................................................... 47

18.2 Principle ........................................................................................................................................................... 47

18.3 Apparatus ........................................................................................................................................................ 47

18.4 Test pieces ....................................................................................................................................................... 49

18.5 Procedure ........................................................................................................................................................ 49

19 Test method for disconnection and re-use .......................................................................................... 50

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SIST EN 1254-20:2021
EN 1254-20:2021 (E)

19.1 Introduction ................................................................................................................................................... 50

19.2 Principle .......................................................................................................................................................... 50

19.3 Apparatus ........................................................................................................................................................ 50

19.4 Test assembly ................................................................................................................................................ 50

19.5 Procedure ........................................................................................................................................................ 50

20 Method for determining if the diameter and/or the length of engagement of a

capillary end is/are within the specified tolerance ......................................................................... 50

20.1 Principle .......................................................................................................................................................... 50

20.2 Apparatus ........................................................................................................................................................ 51

20.3 Test piece ........................................................................................................................................................ 55

20.4 Procedure ........................................................................................................................................................ 55

20.5 Results .............................................................................................................................................................. 55

21 Method for determining the minimum length of engagement of an integral solder or

brazing ring socket having a formed groove ...................................................................................... 55

21.1 Introduction ................................................................................................................................................... 55

21.2 Principle .......................................................................................................................................................... 55

21.3 Apparatus ........................................................................................................................................................ 56

21.4 Test piece ........................................................................................................................................................ 56

21.5 Procedure ........................................................................................................................................................ 56

21.6 Results .............................................................................................................................................................. 56

Annex A (informative) Assembling instructions ............................................................................................ 57

Bibliography ................................................................................................................................................................. 65

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SIST EN 1254-20:2021
EN 1254-20:2021 (E)
European foreword

This document (EN 1254-20:2021) 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 is a supporting standard describing the test methods used by the other parts of the

EN 1254 series.

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.
---------------------- Page: 7 ----------------------
SIST EN 1254-20:2021
EN 1254-20:2021 (E)
1 Scope

This document contains definitions, thread dimension, reference data (minimum bore), supporting

information (assembling instructions) and describes the test methods referenced by other parts of the

EN 1254 series.

Thread dimensions comprise: wall thickness at threaded portions of fittings, dimensions of tail pipe ends

for swivel fittings, dimensions of gas union connectors, thread dimensions and thread profile.

Test methods comprise: leak tightness under internal hydrostatic pressure, leak tightness under internal

pneumatic pressure, integrity of fabricated fitting bodies or having an 'as cast' microstructure, resistance

to pull out of joints to metallic tubes, resistance of joints with metallic tube to vibration, resistance of

joints to static flexural force, leak tightness of joints under vacuum, the resistance of joints to temperature

cycling, detecting non-pressed fitting ends, resistance to stress corrosion, detection of a carbon film on

the surface of copper fittings, determination of mean depth of dezincification, resistance of joints to

pressure cycling, disconnection and re-use, determining if the diameter and/or the length of engagement

of a capillary end is/are within the specified tolerance, determining the minimum length of engagement

of an integral solder or brazing ring socket having a formed groove.
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, Copper and copper alloys - Seamless, round copper tubes for water and gas in sanitary and heating

applications

EN 1333:2006, Flanges and their joints - Pipework components - Definition and selection of PN

EN 10226-1, Pipe threads where pressure tight joints are made on the threads - Part 1: Taper external

threads and parallel internal threads - Dimensions, tolerances and designation

EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions,

tolerances and designation (ISO 228-1)

EN ISO 6509-1:2014, Corrosion of metals and alloys - Determination of dezincification resistance of copper

alloys with zinc - Part 1: Test method (ISO 6509-1:2014)

EN ISO 6708:1995, Pipework components - Definition and selection of DN (nominal size) (ISO 6708:1995)

EN ISO 21003-1:2008, Multilayer piping systems for hot and cold water installations inside buildings - Part

1: General (ISO 21003-1:2008)

ISO 7-1:1994, Pipe threads where pressure-tight joints are made on the threads - Part 1: Dimensions,

tolerances and designation

ISO 7-2, Pipe threads where pressure-tight joints are 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
---------------------- Page: 8 ----------------------
SIST EN 1254-20:2021
EN 1254-20:2021 (E)
3 Terms and definitions

For the purposes of this document and other parts of the EN 1254 series, the following terms and

definitions 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
3.1
plumbing fitting

device used in a tube system for the purpose of connecting the tubes or pipes either to each other or to a

component part of the system
3.2
capillary end

end in which the joint is made by the flow of solder or brazing alloy by capillary action into the annular

space between the capillary end and its connecting part
3.3
end feed fitting

plumbing fitting including one or more capillary ends where the solder or brazing alloy for the capillary

action is introduced externally into the annular space when a connection is made
3.4
integral solder ring fitting
ISR

plumbing fitting including one or more capillary ends that contains the solder alloy needed to make the

connection
3.5
integral brazing ring fitting
IBR

plumbing fitting including one or more capillary ends that contains the brazing alloy needed to make the

connection
3.6
socket
type of end defined by its internal diameter
3.7
male end
type of end defined by its external diameter
3.8
compression end

end in which a mechanical joint is formed by the tightening of a nut to compress a ring or sleeve onto the

outside wall of the tube, or clamp a flared portion of the tube to the body of a fitting

---------------------- Page: 9 ----------------------
SIST EN 1254-20:2021
EN 1254-20:2021 (E)
3.8.1
compression end, Type A, non manipulative

end that requires no preparation of the ends of the tube or pipe other than that they are cut square and

deburred, or chamfered when specified, and in which the joint is made by the compression of a ring or

sleeve onto the outside wall of the tube or pipe with or without additional sealing elements and with or

without an internal tube support
Note 1 to entry: The sealing element may be metallic or non-metallic.
3.8.2
compression end, Type B, manipulative

end that requires forming of the tube or pipe at its end, and in which the joint is made by compressing

the formed portion of the tube or pipe against the formed end of the fitting or a loose ring or sleeve within

the fitting/tube/pipe
3.9
union end

end which enables connection and disconnection with minimal disturbance of other pipe sections

Note 1 to entry: Union ends can be sphere to cone, cone to cone, cone to radius or flat face with a sealing member.

Note 2
...

SLOVENSKI STANDARD
oSIST prEN 1254-20:2019
01-september-2019

Baker in bakrove zlitine - Fitingi - 20. del: Definicije, mere navojev, preskusne

metode, referenčni podatki in dodatne informacije

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

test methods, reference data and supporting information

Kupfer und Kupferlegierungen - Fittings - Teil 20: Definitionen, Gewindeabmessungen,

Prüfverfahren, Referenzdaten und entsprechende Informationen

Cuivre et alliages de cuivre - Raccords - Partie 20 : Définitions, dimensions de filetage,

méthodes d'essai, données de référence et informations supports
Ta slovenski standard je istoveten z: prEN 1254-20
ICS:
23.040.40 Kovinski fitingi Metal fittings
77.150.30 Bakreni izdelki Copper products
oSIST prEN 1254-20:2019 en,fr,de

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

---------------------- Page: 1 ----------------------
oSIST prEN 1254-20:2019
---------------------- Page: 2 ----------------------
oSIST prEN 1254-20:2019
DRAFT
EUROPEAN STANDARD
prEN 1254-20
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2019
ICS 23.040.40
English Version
Copper and copper alloys - Plumbing fittings - Part 20:
Definitions, thread dimensions, test methods, reference
data and supporting information

Cuivre et alliages de cuivre - Raccords - Partie 20 : Kupfer und Kupferlegierungen - Fittings - Teil 20:

Définitions, dimensions de filetage, méthodes d'essai, Definitionen, Gewindeabmessungen, Prüfverfahren,

données de référence et informations supports Referenzdaten und entsprechende Informationen

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

CEN/TC 133.

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

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

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

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

Management Centre has the same status as the official versions.

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

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

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

Kingdom.

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

aware and to provide supporting documentation.

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

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

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1254-20:2019 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 1254-20:2019
prEN 1254-20:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 6

1 Scope .................................................................................................................................................................... 7

2 Normative references .................................................................................................................................... 7

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

4 Thread dimensions ...................................................................................................................................... 11

4.1 Wall thickness at threaded portions of fittings ................................................................................. 11

4.2 Dimensions of tail pipe ends for swivel fittings ................................................................................ 12

4.3 Dimensions of gas union connectors .................................................................................................... 14

4.4 Threaded end dimensions ........................................................................................................................ 15

4.5 Minimum bore of threaded ends ............................................................................................................ 22

5 Test method for leak tightness under internal hydrostatic pressure ...................................... 23

5.1 Introduction ................................................................................................................................................... 23

5.2 Principle .......................................................................................................................................................... 24

5.3 Apparatus ........................................................................................................................................................ 24

5.3.1 Pressure measurement device ................................................................................................................ 24

5.3.2 Pressurizing device ..................................................................................................................................... 24

5.3.3 Pressure connection ................................................................................................................................... 24

5.3.4 End connection .............................................................................................................................................. 24

5.4 Test piece ........................................................................................................................................................ 24

5.5 Procedure........................................................................................................................................................ 25

6 Test method for leak tightness under internal pneumatic pressure ........................................ 25

6.1 Introduction ................................................................................................................................................... 25

6.2 Principle .......................................................................................................................................................... 25

6.3 Apparatus ........................................................................................................................................................ 26

6.3.1 Pressure measurement device ................................................................................................................ 26

6.3.2 Pressurizing device ..................................................................................................................................... 26

6.3.3 Pressure connection ................................................................................................................................... 26

6.3.4 End connection .............................................................................................................................................. 26

6.4 Test piece ........................................................................................................................................................ 26

6.5 Procedure........................................................................................................................................................ 27

7 Integrity of fabricated fitting bodies or having an 'as cast' microstructure ........................... 28

7.1 Introduction ................................................................................................................................................... 28

7.2 Principle .......................................................................................................................................................... 28

7.3 Apparatus ........................................................................................................................................................ 28

7.3.1 Pressure measurement device ................................................................................................................ 28

7.3.2 Pressurizing device ..................................................................................................................................... 28

7.3.3 Pressure connection ................................................................................................................................... 28

7.3.4 End sealing device ........................................................................................................................................ 28

7.4 Test piece ........................................................................................................................................................ 28

7.5 Procedure........................................................................................................................................................ 29

8 Test method for resistance to pull out of joints to metallic tubes .............................................. 29

8.1 Introduction ................................................................................................................................................... 29

8.2 Principle .......................................................................................................................................................... 29

8.3 Apparatus ........................................................................................................................................................ 29

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8.4 Test assembly ................................................................................................................................................. 30

8.5 Procedure ........................................................................................................................................................ 30

9 Test method for the resistance of joints with metallic tube to vibration ................................. 30

9.1 Introduction.................................................................................................................................................... 30

9.2 Principle ........................................................................................................................................................... 30

9.3 Apparatus ........................................................................................................................................................ 30

9.4 Test assembly ................................................................................................................................................. 31

9.5 Procedure ........................................................................................................................................................ 31

10 Test method for the resistance of joints to static flexural force .................................................. 32

10.1 Introduction.................................................................................................................................................... 32

10.2 Principle ........................................................................................................................................................... 32

10.3 Apparatus ........................................................................................................................................................ 32

10.3.1 Pressure measurement device ................................................................................................................ 32

10.3.2 Pressurizing device ...................................................................................................................................... 32

10.3.3 Pressure connection .................................................................................................................................... 32

10.3.4 End connection .............................................................................................................................................. 32

10.3.5 Support ............................................................................................................................................................. 32

10.4 Test piece ......................................................................................................................................................... 32

10.5 Procedure ........................................................................................................................................................ 33

11 Test method for leak tightness of joints under vacuum ................................................................. 34

11.1 Introduction.................................................................................................................................................... 34

11.2 Principle ........................................................................................................................................................... 34

11.3 Apparatus ........................................................................................................................................................ 34

11.3.1 Vacuum pressure measurement device ............................................................................................... 34

11.3.2 Vacuum source (pump) .............................................................................................................................. 34

11.3.3 Isolation valve ................................................................................................................................................ 34

11.3.4 End-sealing device ........................................................................................................................................ 34

11.4 Test piece ......................................................................................................................................................... 34

11.5 Procedure ........................................................................................................................................................ 35

12 Test method for the resistance of joints to temperature cycling to metallic tubes

(liquid applications) .................................................................................................................................... 35

12.1 Introduction.................................................................................................................................................... 35

12.2 Principle ........................................................................................................................................................... 35

12.3 Apparatus ........................................................................................................................................................ 35

12.4 Test assembly ................................................................................................................................................. 36

12.5 Procedure ........................................................................................................................................................ 37

13 Test method for the resistance of joints to temperature cycling (gas applications) ........... 38

13.1 Introduction.................................................................................................................................................... 38

13.2 Principle ........................................................................................................................................................... 38

13.3 Apparatus ........................................................................................................................................................ 38

13.4 Test assembly ................................................................................................................................................. 38

13.5 Procedure ........................................................................................................................................................ 38

14 Method for detecting non-pressed fitting ends ................................................................................. 39

14.1 Introduction.................................................................................................................................................... 39

14.2 Principle ........................................................................................................................................................... 39

14.3 Apparatus ........................................................................................................................................................ 39

14.4 Test piece ......................................................................................................................................................... 39

14.5 Procedure ........................................................................................................................................................ 40

14.6 Results .............................................................................................................................................................. 40

15 Determination of resistance to stress corrosion ............................................................................... 40

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15.1 Introduction ................................................................................................................................................... 40

15.2 Test piece ........................................................................................................................................................ 40

15.3 Procedure........................................................................................................................................................ 41

15.4 Test report ...................................................................................................................................................... 41

16 Test method for detection of a carbon film on the surface of copper fittings ........................ 41

16.1 Preparation of the test piece .................................................................................................................... 41

16.2 Procedure........................................................................................................................................................ 41

16.3 Detection and assessment of films ......................................................................................................... 41

17 Determination of mean depth of dezincification .............................................................................. 41

17.1 Introduction ................................................................................................................................................... 41

17.2 Procedure........................................................................................................................................................ 42

17.3 Expression of results ................................................................................................................................... 42

18 Test method for the resistance of joints to pressure cycling ....................................................... 42

18.1 Introduction ................................................................................................................................................... 42

18.2 Principle .......................................................................................................................................................... 42

18.3 Apparatus ........................................................................................................................................................ 43

18.3.1 Pressurizing device ..................................................................................................................................... 43

18.3.2 Pressure measurement device ................................................................................................................ 43

18.4 Test pieces ...................................................................................................................................................... 44

18.5 Procedure........................................................................................................................................................ 44

19 Test method for disconnection and re-use ......................................................................................... 44

19.1 Introduction ................................................................................................................................................... 44

19.2 Principle .......................................................................................................................................................... 44

19.3 Apparatus ........................................................................................................................................................ 44

19.4 Test assembly ................................................................................................................................................ 45

19.5 Procedure........................................................................................................................................................ 45

20 Method for determining if the diameter and/or the length of engagement of a

capillary end is/are within the specified tolerance ......................................................................... 45

20.1 Principle .......................................................................................................................................................... 45

20.2 Apparatus ........................................................................................................................................................ 45

20.3 Test piece ........................................................................................................................................................ 50

20.4 Procedure........................................................................................................................................................ 50

20.5 Results .............................................................................................................................................................. 50

21 Method for determining the minimum length of engagement of an integral solder or

brazing ring socket having a formed groove ...................................................................................... 50

21.1 Introduction ................................................................................................................................................... 50

21.2 Principle .......................................................................................................................................................... 50

21.3 Apparatus ........................................................................................................................................................ 50

21.4 Test piece ........................................................................................................................................................ 50

21.5 Procedure........................................................................................................................................................ 51

21.6 Results .............................................................................................................................................................. 51

Annex A (informative) Assembling instructions .............................................................................................. 52

A.1 Preparation of tube ..................................................................................................................................... 52

A.1.1 Metallic tubes................................................................................................................................................. 52

A.1.2 Plastics covered tubes (EN 13349) ........................................................................................................ 52

A.1.3 Plastics pipes ................................................................................................................................................. 53

A.2 Jointing procedures ..................................................................................................................................... 53

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A.2.1 General ............................................................................................................................................................. 53

A.2.2 Capillary fittings ............................................................................................................................................ 53

A.2.2.1 Soldering .......................................................................................................................................................... 53

A.2.2.2 Brazing (Hard Soldering) ........................................................................................................................... 54

A.2.2.2.1 Low silver content filler alloys ........................................................................................................ 54

A.2.2.2.2 High silver content filler alloys (e.g. alloy Ag103 according to EN ISO 17672) .............. 54

A.2.3 Compression fittings .................................................................................................................................... 55

A.2.3.1 Type A fittings ................................................................................................................................................ 55

A.2.3.2 Type A Flanged fittings ............................................................................................................................... 55

A.2.3.3 Type B fittings ................................................................................................................................................ 56

A.2.4 Push-fit fittings .............................................................................................................................................. 56

A.2.5 Press fittings ................................................................................................................................................... 56

A.2.6 Fittings with threads ................................................................................................................................... 57

A.2.6.1 Introduction.................................................................................................................................................... 57

A.3 Flushing of water installations ................................................................................................................ 59

Bibliography ................................................................................................................................................................. 60

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European foreword

This document (prEN 1254-20:2019) 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 European standard is a supporting standard describing the test methods used by the other parts of

the EN 1254 series.

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
...

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