Railway applications - Pneumatic half couplings

This document applies to pneumatic half couplings designed to couple either the brake pipes or main reservoir pipes of railway vehicles, without taking the type of vehicles and track-gauge into consideration.
This document gives the requirements for the design, dimensions, testing and quality assurance of pneumatic half couplings.

Bahnanwendungen - Bremskupplungen

Dieses Dokument ist für Bremskupplungen anzuwenden, die so gestaltet sind, dass sie entweder die Hauptluft¬leitung oder die Hauptluftbehälterleitung von Schienenfahrzeugen miteinander verbinden, unabhängig von der Fahrzeugbauart und der Spurweite.
Dieses Dokument legt die Anforderungen an die Konstruktion, die Abmessungen, die Prüfung sowie die Qualitätssicherung der Bremskupplungen fest.

Applications ferroviaires - Demi-accouplements pneumatiques

Le présent document s'applique aux demi-accouplements pneumatiques conçus pour réaliser l'accouplement de la conduite générale de frein ou de la conduite principale des véhicules ferroviaires, indépendamment du type de véhicule et de l'écartement des voies.
Le présent document spécifie les exigences à satisfaire en matière de conception, de dimensions, d’essais et d’assurance qualité des demi-accouplements pneumatiques.

Železniške naprave - Pnevmatske polspojke

General Information

Status
Published
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
10-Mar-2021
Completion Date
10-Mar-2021

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SLOVENSKI STANDARD
SIST EN 15807:2021
01-maj-2021
Nadomešča:
SIST EN 15807:2011
Železniške naprave - Pnevmatske polspojke
Railway applications - Pneumatic half couplings
Bahnanwendungen - Bremskupplungen
Applications ferroviaires - Demi-accouplements pneumatiques
Ta slovenski standard je istoveten z: EN 15807:2021
ICS:
45.040 Materiali in deli za železniško Materials and components
tehniko for railway engineering
SIST EN 15807:2021 en,fr,de

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

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SIST EN 15807:2021
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SIST EN 15807:2021
EN 15807
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2021
EUROPÄISCHE NORM
ICS 45.040 Supersedes EN 15807:2011
English Version
Railway applications - Pneumatic half couplings

Applications ferroviaires - Demi-accouplements Bahnanwendungen - Bremskupplungen

pneumatiques
This European Standard was approved by CEN on 25 January 2021.

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 15807:2021 E

worldwide for CEN national Members.
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SIST EN 15807:2021
EN 15807:2021 (E)
Contents Page

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

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 6

4 Symbols and abbreviated terms ................................................................................................................ 7

5 Design and manufacture ............................................................................................................................... 7

5.1 Requirements ................................................................................................................................................... 7

5.1.1 Brake pipe .......................................................................................................................................................... 7

5.1.2 Main reservoir pipe ........................................................................................................................................ 7

5.1.3 Flexible hose ..................................................................................................................................................... 7

5.1.4 Sealing washers ............................................................................................................................................ 10

5.1.5 Coupling heads .............................................................................................................................................. 12

5.1.6 Nipple ............................................................................................................................................................... 12

5.1.7 Hose clip .......................................................................................................................................................... 12

5.2 Compressed air quality .............................................................................................................................. 18

5.3 Ambient temperature ................................................................................................................................. 19

5.4 Environmental corrosion conditions .................................................................................................... 19

5.5 Leakage ............................................................................................................................................................ 19

5.6 Mechanical strength of assembly ........................................................................................................... 19

5.7 External appearance ................................................................................................................................... 19

5.8 Fire behaviour ............................................................................................................................................... 19

6 Type test methods ........................................................................................................................................ 19

6.1 Sampling for type test ................................................................................................................................. 19

6.2 Test requirements ....................................................................................................................................... 19

6.3 Test procedure flexible hose .................................................................................................................... 20

6.3.1 Nature and proportion of the tests and inspections........................................................................ 20

6.3.2 Preparation of the test pieces .................................................................................................................. 21

6.3.3 Bend test .......................................................................................................................................................... 22

6.3.4 Pressure test .................................................................................................................................................. 23

6.3.5 Bursting test ................................................................................................................................................... 23

6.3.6 Reinforcement adhesion test ................................................................................................................... 23

6.3.7 Test of dynamic fatigue through repeated tensile loadings of the tube and cover .............. 23

6.3.8 Test for residual deformation through static tensile loading after ageing ............................. 23

6.3.9 Impact test ...................................................................................................................................................... 24

6.3.10 Test for Resistance to ozone cracking of the tube and cover under static conditions ........ 26

6.3.11 Deflection at low temperature ................................................................................................................ 26

6.3.12 Test for fitting of connections on hoses ............................................................................................... 27

6.3.13 Uncoupling test ............................................................................................................................................. 29

6.3.14 Flare test .......................................................................................................................................................... 30

6.3.15 Hardness test ................................................................................................................................................. 31

6.3.16 Kink resistance test ..................................................................................................................................... 31

6.3.17 Influence of oil ............................................................................................................................................... 32

6.4 Test procedure sealing washers ............................................................................................................. 32

6.4.1 Nature and proportion of the tests and inspections........................................................................ 32

6.4.2 Preparation of the test pieces .................................................................................................................. 33

6.4.3 Hardness test ................................................................................................................................................. 33

6.4.4 Tensile strength test ................................................................................................................................... 33

6.4.5 Deformation tests......................................................................................................................................... 33

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SIST EN 15807:2021
EN 15807:2021 (E)

6.4.6 Water tightness test ..................................................................................................................................... 35

6.4.7 Influence of oil ............................................................................................................................................... 36

6.5 Test procedure pneumatic half coupling ............................................................................................. 36

6.5.1 Principle ........................................................................................................................................................... 36

6.5.2 Check of physical and geometrical characteristics .......................................................................... 37

6.5.3 Hydraulic test of the assembly at given pressure ............................................................................. 37

6.5.4 Leakage ............................................................................................................................................................. 37

6.5.5 Corrosion test ................................................................................................................................................. 39

6.5.6 Pull test ............................................................................................................................................................. 39

6.6 Documentation .............................................................................................................................................. 40

7 Routine test ..................................................................................................................................................... 40

8 In-service assessment ................................................................................................................................. 41

9 Identification and marking ....................................................................................................................... 41

Annex A (informative) MRP pneumatic half coupling for use in the United Kingdom ..................... 42

A.1 Main reservoir pipe hose incorporating pneumatic half coupling with sealing star

valve................................................................................................................................................................... 42

A.2 MRP rescue hoses ......................................................................................................................................... 44

A.3 MRP rescue coupling head ........................................................................................................................ 44

A.4 MRP rescue coupling head identification ............................................................................................ 44

Annex B (informative) In-service trial ............................................................................................................... 45

B.1 General ............................................................................................................................................................. 45

B.2 Test set-up and sampling ........................................................................................................................... 45

B.3 Procedure ........................................................................................................................................................ 45

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2016/797/EU aimed to be covered ................................................... 46

Bibliography ................................................................................................................................................................. 48

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SIST EN 15807:2021
EN 15807:2021 (E)
European foreword

This document (EN 15807:2021) has been prepared by Technical Committee CEN/TC 256 “Railway

applications”, 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 September 2021, and conflicting national standards shall

be withdrawn at the latest by September 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 15807:2011.

EN 15807:2021 includes the following technical changes with respect to EN 15807:2011:

— the document has been revised generally;
— tolerances, tables and figures have been updated;

— 5.8 “Fire behaviour” has been adapted due to EN 45545-1:2013 and EN 45545-2:2020;

— 5.1.3.5 “Adhesion of the reinforcement”: Nominal values have been adapted due to material

parameters of the requested fire resistant material;
— 5.1.3.15 and 6.3.16 “Kink resistance test” has been added;
— 5.1.3.16 and 6.3.17 “Influence of oil” has been added;
— 5.1.4.6 “Oil resistance of the sealing washer” has been added;
— 5.1.6 “Nipple” and 5.1.7 “Hose clip” have been added;
— 6.4.7 “Influence of oil” has been added;
— Annex A “Vacuum withstand” has been removed;
— Annex ZA has been updated.

This document has been prepared under a standardization request given to CEN by the European

Commission and the European Free Trade Association, and supports essential requirements of

Directive 2016/797/EU.

For relationship with EU Directive 2016/797/EU, see informative Annex ZA, which is an integral part of

this document.

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

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

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

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

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

Kingdom.
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SIST EN 15807:2021
EN 15807:2021 (E)
1 Scope

This document applies to pneumatic half couplings designed to couple either the brake pipes or main

reservoir pipes of railway vehicles, without taking the type of vehicles and track-gauge into

consideration.

This document gives the requirements for the design, dimensions, testing and quality assurance of

pneumatic half couplings.
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 1562:2019, Founding - Malleable cast irons
EN 1563:2018, Founding - Spheroidal graphite cast irons
EN 14478:2017, Railway applications - Braking - Generic vocabulary

EN 45545-1:2013, Railway applications - Fire protection on railway vehicles - Part 1: General

EN 45545-2:2020, Railway applications - Fire protection on railway vehicles - Part 2: Requirements for fire

behavior of materials and components

EN 50125-1:2014, Railway applications - Environmental conditions for equipment - Part 1: Rolling stock

and on-board equipment

EN ISO 228-1:2003, Pipe threads where pressure-tight joints are not made on the threads - Part 1:

Dimensions, tolerances and designation (ISO 228-1:2000)

EN ISO 8033:2017, Rubber and plastics hoses - Determination of adhesion between components

(ISO 8033:2016)

EN ISO 9227:2017, Corrosion tests in artificial atmospheres - Salt spray tests (ISO 9227:2017)

ISO 37:2017, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties

ISO 48-2:2018, Rubber, vulcanized or thermoplastic — Determination of hardness — Part 2: Hardness

between 10 IRHD and 100 IRHD

ISO 1817:2015, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids

ISO 188:2011, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests

ISO 815-1:2019, Rubber, vulcanized or thermoplastic — Determination of compression set — Part 1: At

ambient or elevated temperatures

ISO 815-2:2019, Rubber, vulcanized or thermoplastic — Determination of compression set — Part 2: At low

temperatures

ISO 1431-1:2012, Rubber, vulcanized or thermoplastic — Resistance to ozone cracking — Part 1: Static and

dynamic strain testing
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SIST EN 15807:2021
EN 15807:2021 (E)

ISO 1431-3:2017, Rubber, vulcanized or thermoplastic — Resistance to ozone cracking — Part 3: Reference

and alternative methods for determining the ozone concentration in laboratory test chambers

ISO 2285:2019, Rubber, vulcanized or thermoplastic — Determination of tension set under constant

elongation, and of tension set, elongation and creep under constant tensile load
ISO 8573-1:2010, Compressed air — Part 1: Contaminants and purity classes

ISO 10619-2:2017, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness —

Part 2: Bending tests at sub-ambient temperatures

ISO 23529:2016, Rubber — General procedures for preparing and conditioning test pieces for physical test

methods
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 14478:2017 and the following

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
brake coupling head

components that, when mechanically coupled together, allow a flow of pressurised air between them

3.2
nipple

component at one end of the pneumatic half coupling that connects it to the end cock, or pipe, located on

the vehicle
3.3
hose clip

component that mechanically fixes the hose to the coupling head or the nipple in order to assembly the

pneumatic half coupling
3.4
sealing washer

component that is installed in the coupling head to prevent unacceptable loss of air when two coupling

heads are connected to one another
3.5
flexible hose

component that is connected between the brake coupling head and the nipple to convey the pressurised

air and give the required flexibility between vehicles, and that is generally made up of an elastic tube,

textile reinforcement inlay and elastomeric cover bonded together
3.6
tube
inner layer of the flexible hose which is supplied by the compressed air
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SIST EN 15807:2021
EN 15807:2021 (E)
3.7
reinforcement

intermediate layer that provides the strength to maintain the general shape of the hose whilst giving the

flexibility
3.8
cover

outer layer of the flexible hose which protects the interior constituents from mechanical and

environmental damage
4 Symbols and abbreviated terms
BP Brake Pipe
IRHD International Rubber Hardness Degree
L0 a length of 20 mm marked on the calibrated part of the test piece
MRP Main Reservoir Pipe
5 Design and manufacture
5.1 Requirements
5.1.1 Brake pipe

The pneumatic half couplings for the automatic air brake pipe shall conform to Figure 1, Figure 3, Figure 5

and Figure 9. The length of the assembled pneumatic half coupling, dimension X-X in Figure 1, is specified

to suit the application, but the recommended length is 730 mm. The nipple to connect to the end cock

shall be in accordance with 5.1.6.
5.1.2 Main reservoir pipe

The pneumatic half couplings for the main reservoir pipe shall conform to Figure 2, Figure 4, Figure 5 and

Figure 9 for interoperable traffic. The length of the assembled pneumatic half coupling, dimension X-X in

Figure 2, is specified to suit the application, but the recommended length is 730 mm. The nipple to

connect to the end cock shall be in accordance with 5.1.6.

NOTE An alternative design of the MRP half coupling, as described in Annex A, is permitted for use in the United

Kingdom.
5.1.3 Flexible hose
5.1.3.1 General

The nominal internal diameter of the coupling hoses for both pipes shall be 28 mm. The length of the

flexible hose is varied to suit the application, but should be the standard 620 mm to give the

recommended length of 730 mm for dimension X-X as shown in Figure 1 and Figure 2. The recommended

length of these hoses when used with a swing head autocoupler should be increased to give an assembled

length of the pneumatic half coupling of 1 080 mm for the automatic air brake pipe and 930 mm for the

main reservoir pipe. Elastomeric composite hoses having a textile reinforcement inlay shall be used for

these couplings (see Figure 10). It shall be avoided that textile reinforcement inlay is destroyed by

humidity (e.g. by using of hydrophobic textile materials). The flexible hose shall conform to the

dimensions defined in Figure 10. The choice of elastomers for elastomeric composite hoses is the choice

of a manufacturer to meet the requirements of this specification. The elastomer used during a serial

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SIST EN 15807:2021
EN 15807:2021 (E)

production shall conform with regard to the formulation of materials and characteristics to those

products tested in the assessment procedure.
The tolerances for the overall length of the pneumatic half couplings shall be:
— < 1 000 mm ±5 mm,
— 1 000 mm to 2 499 mm ±10 mm,
— 2 500 mm to 6 000 mm ±30 mm,
— > 6 000 mm ±0,8 %.
The requirements 5.1.3.2 to 5.1.3.16 concern the elastomeric composite hoses.
5.1.3.2 Bending

It shall be possible to bend the hose to form approximately a torus, without using a total force greater

than 130 N for this operation, without folds appearing on the peripheral surface and without the

maximum flattening recorded amounting to more than 16 % of the nominal external diameter of the hose.

This requirement shall be tested in accordance with 6.3.3.
5.1.3.3 Behaviour under pressure

After being subjected to an internal pressure of 13 bar for a period of 5 min, there shall be no apparent

leak, swelling, or tear on the hose. The dimensional variations admitted under pressure conditions shall

be as follows:
— variation in external diameter ±10 %;
— variation in length ≤ 3,5 %;
— twist ≤ 20 °/m.

In addition, after discontinuation of the test pressure after a waiting period of 3 min, the max. permanent

deformation to the initial state of the hose shall be as follows:
— variation in external diameter ±2 %;
— variation in length ±2 %.
This requirement shall be tested in accordance with 6.3.4.
5.1.3.4 Bursting pressure

The bursting pressure, measured on the hose in delivery condition, shall not be less than 70 bar.

This requirement shall be tested in accordance with 6.3.5.
5.1.3.5 Adhesion of the reinforcement

The mean value of the force needed to separate the reinforcement and each of the layers:

— shall not be less than 2,5 N/mm for hoses tested in accordance with EN ISO 8033:2017, type 1 and

type 2 in delivery condition, and

— shall not be less than 2,5 N/mm for hoses tested in accordance with EN ISO 8033:2017, type 1 and

type 2 after ageing for 7 days at 70 °C, and

— should not be less than 2,5 N/mm for hoses tested in accordance with EN ISO 8033:2017, type 1 and

type 2 after interaction with oil in accordance with 6.3.17.
This requirement shall be tested in accordance with 6.3.6.
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SIST EN 15807:2021
EN 15807:2021 (E)

If the methods from EN ISO 8033:2017, type 1 or type 2 are not appropriate to a specific design of half

coupling, another method from EN ISO 8033:2017 may be used. The criteria of acceptance is then defined

before the test on a case-by-case basis.
5.1.3.6 Resistance of the tube and cover of the hose to repeated tensile loads

The tube and cover of the hose, when subjected to successive repeated tensile loads, shall withstand, in

accordance with the conditions defined in 6.3.7
— 400 tensile loadings for hoses tested in delivery condition,
— 350 tensile loadings for hoses tested after ageing for 7 days at 70 °C.
This requirement shall be tested in accordance with 6.3.7.

5.1.3.7 Residual deformation through static tensile loading of the tube of the hose

After tensile loading, the test piece taken from the tube of the hose and tested after ageing for 7 days at

70 °C, shall not be more than L0 + 12 % in length.
This requirement shall be tested in accordance with 6.3.8.
5.1.3.8 Impact resistance

After being subjected to the impact of a weight of 10 kg dropped from a height of 1 m, the bursting

pressure of the hose shall not be less than 70 bar.
This requirement shall be tested in accordance with 6.3.9.

5.1.3.9 Resistance to ozone cracking of the tube and cover of the hose under static conditions

The tube and cover of the hose, after exposure to an ozone-enriched atmosphere, shall not show signs of

cracking visible with a magnifying glass with a magnifying power of 7 X.
This requirement shall be tested in accordance with 6.3.10.
5.1.3.10 Behaviour at low temperature

The deflection of the hose as measured at the end of a length of 250 mm, 3 s after application of a load of

20 N at −30 °C, shall not be less than 10 mm.

If the brake coupling is used for temperatures down to −40 °C, an additional temperature test shall be

performed.
This requirement shall be tested in accordance with 6.3.11.

After bending and regaining ambient temperature, the hose shall pass a burst pressure test in accordance

with 5.1.3.4.
5.1.3.11 Ease of assembly of connections on the hoses

It shall be possible for the connections to be easily mounted on the hoses under the conditions stipulated

in 6.3.12 so that the end of the hose makes clean contact with the shoulder of the connection. The centre

lines of the hose and connection shall be in alignment after assembly.
This requirement shall be tested in accordance with 6.3.12.
5.1.3.12 Resistance to uncoupling of connections on the hoses

Uncoupling of the connection of the hose to the end fittings shall not occur when the pressure is less than

20 bar when the hose has been inserted as prescribed in 5.1.3.11 and the hose clip has been tightened

using the minimum force prescribed in the assembly instructions for the pneumatic half coupling.

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EN 15807:2021 (E)
This requirement shall be tested in accordance with 6.3.13.
5.1.3.13 Elongation resistance

After an elongation, the linings and layers shall neither tear nor become detached. The inspection shall

cover the visible outer surfaces, and it shall be performed with the naked eye.

The measured residual widening in any part of the hose shall not exceed 2 % after a waiting period of

(120 + 20) s.
This requirement shall be tested in accordance with 6.3.14.
5.1.3.14 Hardness
Requirements for hardness are the following:

— Hardness in delivery condition at (23 ± 2) °C: Manufacturers stated nominal IRHD with a tolerance

of ± 5 IRHD.

— Hardness after ageing for 7 days at 70 °C: Hardness recorded after ageing shall not deviate by more

than ±
...

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