EN 15807:2021

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

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.

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
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

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.
— 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.
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
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
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
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.
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.
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 ± 5 IRHD from the value recorded before ageing.
This requirement shall be tested in accordance with 6.3.15.
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 flexible hose
If required, by the technical specification, oil resistance test should be performed in accordance with
6.3.17.
5.1.4 Sealing washers
5.1.4.1 Dimensions
The dimensional specifications of the sealing washers shall be in accordance with Figure 9.
5.1.4.2 Hardness
Requirements for hardness are the following:
— Hardness in delivery condition at (23 ± 2) °C: 65 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 6.4.3.
5.1.4.3 Tensile characteristics
a) In delivery condition:
1) ultimate tensile strength ≥ 10 MPa;
2) elongation at break ≥ 300 %;
b) After ageing for 7 days at 70 °C:
Characteristics recorded after ageing shall not deviate from those recorded prior to ageing by more
than:
1) 20 % for ultimate tensile strength,
2) 30 % for elongation at break.
This requirement shall be tested in accordance with 6.4.4.
5.1.4.4 Deformation resistance
Deformation tests shall be carried out at high and low temperature. The test set out in 5.1.4.4, a) or those
specified in 5.1.4.4, b) shall be performed:
a) Deformation under tensile test:
1) tension set under 50 % elongation for 24 h at 70 °C: ≤ 10 %;
2) flexibility test at −25 °C and under 50 % compression, carried out in delivery condition: ≤ 8 %.
b) Deformation under compression test:
1) compression set following compression for 22 h at 70 °C: ≤ 25 %;
2) compression set following compression for 22 h at −30 °C: ≤ 60 %.
This requirement shall be tested in accordance with 6.4.5.
5.1.4.5 Water tightness
Two coupling heads, fitted with sealing washers and joined together to simulate service conditions and
immersed in water, shall be watertight round the sealing washers and allow no visible leakage (no air
bubbles) under the effect of 0,5 bar air pressure.
This requirement shall be tested in accordance with 6.4.6.
5.1.4.6 Oil resistance of the sealing washer
Under the influence of the oil indicated in technical specification, the variation in hardness and volume of
test pieces shall be in conformity with technical specification.
This requirement shall be tested in accordance with 6.4.7.
5.1.5 Coupling heads
The coupling head for the BP shall conform to Figure 3, Figure 5 and Figure 6 or Figure 7. The coupling
head for the MRP shall conform to Figure 4, Figure 5 and Figure 6 or Figure 7. All the figures show the
mandatory dimensions to ensure coupling, but the shape and the other dimensions are able to be varied,
provided the heads are designed to offer the least possible resistance to airflow. The sealing washer
shown in Figure 9 shall be used.
The material of the coupling heads shall be one of the following:
— EN-GJS-400-15 or EN-GJS-500-7 in accordance with EN 1563:2018;
— EN-GJMB-350-10 or EN-GJMW-400-05 in accordance with EN 1562:2019;
— other material if equivalent characteristics are demonstrated.
NOTE An alternative design of the MRP coupling head, as described in Annex A, is permitted for use in the
United Kingdom.
5.1.6 Nipple
The nipple to connect to the end cock shall be as shown in Figure 6 or Figure 7 and Figure 8, and shall
have a truncated internal pipe thread of size G 1 1/4 in accordance with EN ISO 228-1:2003.
The figures show the mandatory dimensions, but the shape and the other dimensions are able to be
varied, provided the nipples are designed to offer the least possible resistance to airflow.
The material of the nipple shall be one of the following:
— EN-GJS-400-15 or EN-GJS-500-7 in accordance with EN 1563:2018;
— EN-GJMB-350-10 or EN-GJMW-400-05 in accordance with EN 1562:2019;
— other material if equivalent characteristics are demonstrated.
5.1.7 Hose clip
The design of the hose clip shall ensure that the pneumatic half coupling withstands the mechanical
strength requirements as defined in 5.6.
Key
X - X length of the assembled pneumatic half coupling
Figure 1 — Brake pipe pneumatic half coupling

Key
X - X length of the assembled pneumatic half coupling
Figure 2 — Main reservoir pneumatic half coupling
Dimensions in millimetres
Key
1 alternative view in direction of arrow B
2 part view in direction of arrow C
3 part view in direction of arrow B
4 alternative view in direction of arrow C
a
mandatory dimension
Figure 3 — Brake pipe coupling head
Dimensions in millimetres
Key
1 alternative view in direction of arrow B
2 part view in direction of arrow C
3 part view in direction of arrow B
4 alternative view in direction of arrow C
a
mandatory dimension
Figure 4 — Main reservoir pipe coupling head
Dimensions in millimetres
Key
a
mandatory dimension
Figure 5 — Groove for the sealing washer
Dimensions in millimetres
Figure 6 — Nipple end (coupling head shown in Figure 3 and Figure 4)
Dimensions in millimetres
Figure 7 — Alternative nipple end geometry
Dimensions in millimetres
Figure 8 — Nipple base geometry
Dimensions in millimetres
All dimensions are mandatory.
Figure 9 — Sealing washer
Dimensions in millimetres
a) Detail A: preferred arrangement b) Detail A: alternative arrangement
Key
B bore of hose
C outer diameter of hose
D wall thickness of hose
E textile reinforcement inlay
F tube
F cover
G area of hose where the identification marking is to be located
L length of hose
Figure 10 — Flexible hose
5.2 Compressed air quality
It shall be possible to operate the pneumatic half coupling without restrictions with at least the
compressed air quality in accordance with the following classes defined by ISO 8573-1:2010:
— class 4 – for the maximum particle size and the maximum concentration of solid contaminants;
— class 4 – for the water dewpoint;
— class 4 – for the maximum total (droplets, aerosols and vapours) oil concentration.
5.3 Ambient temperature
The pneumatic half coupling shall be able to operate within the temperature classes T1 and TX as
specified by EN 50125-1:2014, where the upper limit for TX is +70 °C external air temperature.
NOTE A higher or lower temperature value can be specified if operational constraints demand it.
5.4 Environmental corrosion conditions
The pneumatic half coupling shall withstand the external corrosion due to normal atmospheric pollutants
such that its function is unaffected. The pneumatic half coupling shall be tested in accordance with 6.5.5.
5.5 Leakage
The sealing arrangement with the pneumatic half coupling assembly shall prevent any significant loss of
air dependent on the temperature. Between −25 °C and +70 °C the pneumatic half coupling shall not leak
at a greater rate than 0,030 Nl/min when tested at a pressure of 10 bar. This requirement shall be tested
in accordance with 6.5.4.2.
Between −40 °C and −25 °C, a pair of pneumatic half couplings shall have a leakage rate of not greater
than 0,2 Nl/min when tested at a pressure of 10 bar in accordance with 6.5.4.3.
5.6 Mechanical strength of assembly
The pneumatic half coupling shall withstand an overpressure of 15 bar for 15 min and 40 bar for 15 s
without detachment of the hose from the coupling head or from the nipple, and no leakage shall be
generated. This requirement shall be tested in accordance with 6.5.3.
The pneumatic half coupling shall withstand a pull test when the coupling head is screwed on to a fixture
and the nipple is pulled with a force of 5 kN for 30 s. The hose shall not move on the nipple or coupling
head. The hose shall not suffer damage and there shall be no leakage generated. This requirement shall
be tested in accordance with 6.5.6.
5.7 External appearance
The external surfaces of the pneumatic half coupling shall be free of sharp edges that could be a danger
to those persons handling the pneumatic half coupling or to other equipment in the proximity of the
pneumatic half coupling. This requirement shall be checked while testing the other constructional
features in accordance with 6.5.2.
5.8 Fire behaviour
If applicable in accordance with EN 45545-1:2013, the fire behaviour of the pneumatic half coupling shall
be consistent with EN 45545-2:2020.
6 Type test methods
6.1 Sampling for type test
A sample of ten pneumatic half couplings shall be taken from the production.
6.2 Test requirements
If not otherwise specified, all the type tests shall be performed at (20 ± 5) °C and the air quality of the
compressed air class 4-4-4 specified in ISO 8573-1:2010.
For all test values without specific tolerances, the tolerances of ± 5 % shall be applied.
6.3 Test procedure flexible hose
6.3.1 Nature and proportion of the tests and inspections
The hoses shall be subjected to the tests and inspections indicated in Table 1 and Table 2 as shown. The
batch size the samples are taken from is unlimited, provided measures shall be taken to provide identical
material for the whole batch.
Table 1 — Testing of flexible hose – example of sample selection
Nature of the Corresponding Corresponding Number of tested hoses per batch
tests and test subclause requirement
1 2 3 4 5 6 7 8 9 10 11 12
inspections subclause
Dimensional — 5.1.3.1 General
x x x x x x x x x x x x
check
Bend test 6.3.3 Bend test 5.1.3.2 Bending x x x
Deformation 6.3.11 Deflection 5.1.3.10
test at low at low Behaviour at low x x x
temperature temperature temperature
Elongation 6.3.14 Flare test 5.1.3.13
test Elongation x x x
resistance
Hardness test 6.3.15 Hardness 5.1.3.14
x x x
test Hardness
Impact test 6.3.9 Impact test 5.1.3.8 Impact
x x x
resistance
Connection 6.3.12 Test for 5.1.3.11 Ease of
assembly test fitting of assembly of
connections on connections on
hoses the hoses
6.3.13 5.1.3.12 x x x
Uncoupling test Resistance to
uncoupling of
connections on
the hoses
Kink 6.3.16 Kink 5.1.3.15 Kink
resistance resistance test resistance  x x
test
Pressure test 6.3.4 Pressure 5.1.3.3
test Behaviour under x x
pressure
Bursting test 6.3.5 Bursting 5.1.3.4 Bursting
x x
test pressure
Oil resistance 6.3.17 Influence 5.1.3.16 Oil       x x
test of oil resistance of the
flexible hose
Table 2 — Sample testing of test pieces
Nature of the tests Corresponding Corresponding Number of Shape and
and inspections test subclause requirement tested pieces dimensions of
subclause per batch the test pieces
Reinforcement 6.3.6 5.1.3.5 Adhesion
adhesion test: Reinforcement of the
adhesion test reinforcement
– in delivery condition  3
Test pieces: hose
section 35 mm
– after ageing 3
to 40 mm in
length
Test for dynamic 6.3.7 Test of 5.1.3.6 Resistance
fatigue through dynamic fatigue of the tube and
repeated tensile through repeated cover of the hose
loadings: tensile loadings of to repeated
the tube and tensile loads
cover
Dumb-bell
– in delivery condition   3 per cover
shaped test
3 per tube
pieces in
– after ageing   3 per cover accordance with
3 per tube 6.3.2
Test pieces of the 6.3.8 Test for 5.1.3.7 Residual
Dumb-bell
tube for residual residual deformation
shaped test
deformation deformation through static
3 pieces in
through static through static tensile loading of
accordance with
tensile loading after tensile loading the tube of the
6.3.2
ageing after ageing hose
Test for resistance 6.3.10 Test for 5.1.3.9 Resistance
Dumb-bell
to ozone cracking of Resistance to to ozone cracking
shaped test
the tube and cover ozone cracking of of the tube and 3 per cover
pieces in
under static the tube and cover of the hose 3 per tube
accordance with
conditions cover under static under static
6.3.2
conditions conditions
6.3.2 Preparation of the test pieces
The test pieces required for the tests provided in 6.3.7, 6.3.8, 6.3.10 and 6.3.17 shall be of type 2 in
accordance with ISO 37:2017; they are taken from the hose in the circumferential direction. Alternatively,
samples from calendered plates may be used. The sampling shall be positioned on these plates so that the
loading direction goes across to the direction of calendering.
The test pieces for testing after accelerated ageing shall be placed in an oven at 70 °C for 7 days. These
operations shall be carried out in accordance with ISO 188:2011. The other test pieces shall be tested in
delivery condition.
6.3.3 Bend test
The bend test shall be carried out by means of two handles and a disc as shown in Figure 11. The disc
shall contain a small A-shaped opening for insertion of the recording instrument in order to determine
the flattening of the hose during bending. The length of the hose is 620 mm.
The bending force F is measured at a distance J from the hose end.
During bending, no axial force shall be applied on the hose ends.
The result shall be consistent with those stipulated in 5.1.3.2.
Dimensions in millimetres
Key
A shaped opening for measuring diameter = (30 ± 2) mm
B hos
...