SIST EN 15807:2021
(Main)Railway applications - Pneumatic half couplings
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 gilt für Bremskupplungen, die so gestaltet sind, dass sie entweder die Hauptluftleitung 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 fournit les exigences relatives à la conception, aux dimensionnels, aux essais et à l'assurance de la qualité des demi-accouplements pneumatiques.
Železniške naprave - Pnevmatske polspojke
General Information
Relations
Standards Content (Sample)
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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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
3
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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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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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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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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 ±
...
SLOVENSKI STANDARD
oSIST prEN 15807:2019
01-junij-2019
Železniške naprave - Pnevmatske polspojke
Railway applications - Pneumatic half couplings
Bahnanwendungen - Bremskupplungen
Applications ferroviaires - Demi-accouplements pneumatiques
Ta slovenski standard je istoveten z: prEN 15807
ICS:
45.040 Materiali in deli za železniško Materials and components
tehniko for railway engineering
oSIST prEN 15807:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 15807:2019
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oSIST prEN 15807:2019
DRAFT
EUROPEAN STANDARD
prEN 15807
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2019
ICS 45.040 Will supersede EN 15807:2011
English Version
Railway applications - Pneumatic half couplings
Applications ferroviaires - Demi-accouplements Bahnanwendungen - Bremskupplungen
pneumatiques
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 256.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15807:2019 E
worldwide for CEN national Members.
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oSIST prEN 15807:2019
prEN 15807:2019 (E)
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Symbols and abbreviations . 6
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 . 11
5.1.6 Nipple . 12
5.1.7 Hose Clip . 12
5.2 Compressed air quality . 17
5.3 Ambient temperature . 18
5.4 Environmental corrosion conditions . 18
5.5 Leakage . 18
5.6 Mechanical strength of assembly . 18
5.7 External appearance . 18
5.8 Fire behaviour . 18
6 Type test methods . 18
6.1 Sampling for type test . 18
6.2 Test requirements . 18
6.3 Test procedure flexible hose . 19
6.3.1 Nature and proportion of the tests and inspections. 19
6.3.2 Preparation of the test pieces . 21
6.3.3 Bend test . 21
6.3.4 Pressure test . 22
6.3.5 Bursting test . 22
6.3.6 Reinforcement adhesion test . 23
6.3.7 Test of dynamic fatigue through repeated tensile loadings of the internal and
external layers . 23
6.3.8 Test for residual deformation through static tensile loading after ageing . 23
6.3.9 Impact test . 23
6.3.10 Test for Resistance to ozone cracking of the internal and external layers under static
conditions . 25
6.3.11 Deflection at low temperature . 26
6.3.12 Test for fitting of connections on hoses . 26
6.3.13 Uncoupling test . 28
6.3.14 Flare test . 29
6.3.15 Hardness test . 30
6.3.16 Kink resistance test . 30
6.3.17 Influence of Oil . 31
6.4 Test procedure sealing washers . 31
6.4.1 Nature and proportion of the tests and inspections. 31
6.4.2 Preparation of the test pieces . 32
6.4.3 Hardness test . 32
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6.4.4 Tensile strength test . 32
6.4.5 Deformation tests . 32
6.4.6 Water tightness test . 34
6.4.7 Influence of oil . 35
6.5 Test procedure pneumatic half coupling . 35
6.5.1 Principle . 35
6.5.2 Check of physical and geometrical characteristics . 35
6.5.3 Hydraulic test of the assembly at given pressure . 36
6.5.4 Leakage . 36
6.5.5 Corrosion test . 38
6.5.6 Pull test . 38
6.6 Documentation . 39
7 Routine test . 39
8 In-Service assessment . 39
9 Identification and marking . 40
Annex A (informative) MRP pneumatic half coupling for use in the United Kingdom . 41
A.1 Main reservoir pneumatic half coupling . 41
A.2 General . 43
A.3 Coupling head . 43
A.4 Identification . 43
Annex B (informative) In-service trial . 44
B.1 General . 44
B.2 Test set-up and sampling . 44
B.3 Procedure . 44
(informative) Relationship between this European Standard and the essential
requirements of Directive 2008/57/EC aimed to be covered . 45
Bibliography . 47
3
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oSIST prEN 15807:2019
prEN 15807:2019 (E)
European foreword
This document (prEN 15807:2019) has been prepared by Technical Committee CEN/TC 256 “Railway
applications”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 15807:2011.
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
EU 2008/57/EC.
For relationship with EU Directive 2008/57/EC, see informative Annex ZA, which is an integral part of
this document.
prEN 15807:2019 includes the following technical changes with respect to EN 15807:2011:
— the document has been revised generally;
— tolerances, tables and pictures have been updated;
— 5.8 “Fire behaviour” has been adapted due to EN 45545-1 and EN 45545-2;
— 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;
— 5.1.6 “Nipple” and 5.1.7 “Hose clip” have been added;
— Annex A “Vacuum withstand“ has been removed;
— Annex ZA has been updated.
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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, Founding — Malleable cast irons
EN 14478, Railway applications — Braking — Generic vocabulary
EN 45545-1, Railway applications — Fire protection on railway vehicles — Part 1: General
EN 45545-2, Railway applications — Fire protection on railway vehicles — Part 2: Requirements for fire
behaviour of materials and components
EN 50125-1:2014, Railway applications — Environmental conditions for equipment — Part 1: Rolling
stock and on-board equipment
EN ISO 8033:2017, Rubber and plastics hoses — Determination of adhesion between components
(ISO 8033:2016)
EN ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests (ISO 9227)
ISO 37:2017, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
ISO 48:2016, Rubber, vulcanized or thermoplastic — Determination of hardness (hardness between 10
IRHD and 100 IRHD)
ISO 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 815, Rubber, vulcanized or thermoplastic — Determination of compression set at ambient, elevated or
low temperatures
ISO 1431-1, Rubber, vulcanized or thermoplastic — Resistance to ozone cracking — Part 1: Static and
dynamic strain testing
ISO 1431-3, 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, 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 tubes — Measurement of flexibility and stiffness —
Part 2: Bending tests
ISO 23529:2016, Rubber — General procedures for preparing and conditioning test pieces for physical test
methods
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3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 14478 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 http://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 and elastomeric covering bonded together
3.6
tube
interior layer of the flexible hose
3.7
reinforcement
intermediate layer that provides the strength to maintain the general shape of the hose whilst giving the
flexibility
3.8
covering
external layer of the flexible hose which protects the interior constituents from mechanical and
environmental damage
4 Symbols and abbreviated terms
“ inch
BP Brake Pipe
IRHD International Rubber Hardness Degree
LO a length of 20 mm marked on the calibrated part of the test piece
MRP Main Reservoir Pipe
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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, Figure 6 or Figure 7 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.
5.1.2 Main reservoir pipe
The pneumatic half couplings for the main reservoir pipe shall conform to Figure 2, Figure 4, Figure 5,
Figure 6 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 as shown in Figure 1 (and is the same as for the air brake
pipe) and shall have a truncated internal ISO 228 - G 1 1/4” pipe thread.
NOTE An alternative design of the MRP half coupling, as described in Annex A, is possible 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 reinforcing inlay sealed (vulcanised)
at each end shall generally be used for these couplings, Figure 10, but hoses of other materials, e.g.
metallic, may be used. 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 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.
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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 even for any additional repetition test:
— 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
— 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
— 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.
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 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 internal and external layers of the hose to repeated tensile loads
The internal and external layers 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 internal layer of the hose
After tensile loading, the test piece taken from the internal layer 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.
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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 internal and external layers of the hose under static
conditions
The internal and external layers 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 20 mm.
If the brake coupling is used for temperatures up to −40 °C, an additional temperature test shall be
perfomed.
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 clamp has been tightened
using the minimum force prescribed in the assembly instructions for the pneumatic half coupling.
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.
Moreover, the residual widening in any part of the hose shall not exceed 2 % after a waiting period of
(2+1) min.
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 ± 5 IRHD from the value recorded before ageing.
This requirement shall be tested in accordance with 6.3.15.
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5.1.3.15 Kink resistance
There shall be no observable permanent deformation or structural damage and no hose delamination
after the kink resistance test.
NOTE When the hose is bent at too sharp an angle, it can kink and shorten the effective hose life, and any such
kinking is not an acceptable or safe practice, but it happens. The requirement for a kink resistance test is included
to prevent potential problems with hose kinking in actual field use.
The requirement shall be tested in accordance with 6.3.16.
5.1.3.16 Oil resistance of the inner hose and cover
Under the influence of oil, the variation in volume of the inner hose and the cover shall be between 0 %
and +15 %. If no samples with a thickness of (2 ± 0,2) mm can be taken, a deviation in volume of 20 % is
per
...
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