prEN 16922
(Main)Railway applications - Ground based services - Vehicle waste water discharge equipment
Railway applications - Ground based services - Vehicle waste water discharge equipment
This European Standard specifies the interface requirements for controlled emission toilet equipment on railway vehicles and the infrastructure, including catering area sink waste retention tanks. Vehicle and infrastructure specific requirements are also given.
The European Standard includes fixed and portable infrastructure equipment used to empty retention tanks, but excludes equipment fitted to railway vehicles where no fixed connections are used between vehicle and infrastructure.
Bahnanwendungen - Versorgungsdienste - Fahrzeugabwasserentsorgungseinrichtungen
Applications ferroviaires - Services au sol - Equipement de vidange des eaux usées des véhicules
Železniške naprave - Talna oskrba - Oprema vozil za odvoz odpadnih voda
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2024
Železniške naprave - Talna oskrba - Oprema vozil za odvoz odpadnih voda
Railway applications - Ground based services - Vehicle waste water discharge
equipment
Bahnanwendungen - Versorgungsdienste - Fahrzeugabwasserentsorgungseinrichtungen
Applications ferroviaires - Services au sol - Equipement de vidange des eaux usées des
véhicules
Ta slovenski standard je istoveten z: prEN 16922
ICS:
13.060.30 Odpadna voda Sewage water
45.060.20 Železniški vagoni Trailing stock
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2024
ICS Will supersede EN 16922:2017+A1:2019
English Version
Railway applications - Ground based services - Vehicle
waste water discharge equipment
Applications ferroviaires - Services au sol - Equipement Bahnanwendungen - Versorgungsdienste -
de vidange des eaux usées des véhicules Fahrzeugabwasserentsorgungseinrichtungen
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, 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, Türkiye 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16922:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 General. 5
4.1 Description of vacuum . 5
4.2 Description of controlled emission toilet systems . 5
5 Requirements . 5
5.1 General requirements . 5
5.2 Vehicle requirements . 7
5.2.1 Connections . 7
5.2.2 System design . 10
5.2.3 Temperature of operation . 11
5.2.4 Pipework . 11
5.2.5 Retention tank . 12
5.2.6 Venting system . 14
5.2.7 Sink waste . 15
5.2.8 Test for leakage . 15
5.3 Infrastructure requirements . 15
5.3.1 General. 15
5.3.2 System design . 15
5.3.3 Connection . 15
5.3.4 Flushing . 16
5.3.5 Breakaway coupling . 16
5.3.6 Pipework . 16
5.3.7 Chemical storage . 16
5.4 Information and instruction . 16
5.4.1 For railway vehicles . 16
5.4.2 For fixed installations (this includes mobile ground based installations) . 16
Annex A (informative) Generic types of toilet retention systems . 17
Bibliography . 21
European foreword
This document (prEN 16922:2024) 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 16922:2017+A1:2019.
This document includes the following significant changes with respect to EN 16922:2017+A1:2019:
— 5.2.8 is revised to give additional guidance to not over pressurize the system;
— update of standard references.
1 Scope
This document specifies the interface requirements for controlled emission toilet equipment on railway
vehicles and the infrastructure, including catering area sink waste retention tanks. Vehicle and
infrastructure specific requirements are also given.
The document includes fixed and portable infrastructure equipment used to empty retention tanks, but
excludes equipment fitted to railway vehicles where no fixed connections are used between vehicle and
infrastructure.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 1717:2000, Protection against pollution of potable water in water installations and general
requirements of devices to prevent pollution by backflow
EN 12663-1:2010+A2:2023, Railway applications - Structural requirements of railway vehicle bodies - Part
1: Locomotives and passenger rolling stock (and alternative method for freight wagons)
EN 15877-2:2013, Railway applications - Markings of railway vehicles - Part 2: External markings on
coaches, motive power units, locomotives and on track machines
EN 16362:2013, Railway applications - Ground based services - Water restocking equipment
EN 45545-2:2020+A1:2023, Railway applications - Fire protection on railway vehicles - Part 2:
Requirements for fire behaviour of materials and components
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
railway infrastructure
all installations required for the running of railway vehicles including operating and support facilities
EXAMPLE Tracks, crossings, catenaries, signals, maintenance depots.
3.2
grey water
waste water from hand wash and galley sinks, usually contaminated with soap, germicides, residues of
food, drink and dish water
3.3
servicing point
location where maintenance, refuelling and cleaning is carried out
3.4
controlled emission toilet
toilet system where the toilet waste is retained on the vehicle and emptied at prescribed locations,
including on board waste treatment systems which are permitted to discharge some wastes at various
locations
4 General
4.1 Description of vacuum
Vacuum can be expressed in different manners. Absolute vacuum is 0 bar and atmospheric pressure is
nominally 1 bar (although this varies). When a vacuum pump evacuates 0,2 bar from a tank the remaining
pressure within the tank is 0,8 bar (if the atmospheric pressure is 1 bar), but this can be expressed in a
variety of ways. Therefore, to avoid doubt, because the atmospheric pressure varies, throughout this
standard vacuum is expressed as a negative number of bars below atmosphere (i.e. in the above example
this is expressed within this standard as −0,2 bar).
Positive pressure is expressed as bars above atmosphere, i.e. in this standard an absolute pressure of
3 bar is shown as +2 bar.
4.2 Description of controlled emission toilet systems
There are five generic types of controlled emission toilets fitted to railway vehicles considered in this
document, shown diagrammatically in Annex A.
5 Requirements
5.1 General requirements
Each vehicle and servicing point shall be clearly marked with the type of system that is fitted, or intended
to be used for. Adjacent to the connection on the vehicle and infrastructure the background, or if there is
no background, an area beside the connection with a minimum dimension 60 mm x 60 mm, shall be
coloured as shown in Table 1 and marked with the wording shown in Table 1 in the native language of
the servicing point or the home depot of the vehicle and also at least in English. The labels shall be in a
contrasting colour to the background colour.
Table 1 — Identification of toilet system
Background Wording of label Wording of label Wording of label
colour beside 3” beside 1” beside high
connection connection pressure water
The size of
connection
Type of system background
colour shall be
at least
60 mm x 60 mm:
Compact system Green Toilet discharge Flushing pipe Not applicable
On line vacuum Green Toilet discharge Flushing pipe Not applicable
Toilet discharge, Flushing pipe
Permanent
Red ensure ventilation Not applicable
vacuum
is open
Chemical toilet Flushing and
Chemical Blue Not applicable
discharge chemical addition
On board waste On board waste
On board waste On board waste
treatment toilet treatment water
treatment (e.g. Yellow treatment high
discharge and inlet and suction
bioreactor) pressure water
cleaning
Catering area sink Catering area sink Not applicable Not applicable
Grey
waste retention waste
The position on a vehicle of the background colour and labels described in Table 1 is shown
diagrammatically in Figure 1.
Key
1 background colour of type of system (as shown in Table 1)
2 label beside 3” connection
3 label beside 1” connection
Figure 1 — Identification of connections on vehicle
On the label shown in Figure 1, Key 2, the volume of the retention tank in litres shall be indicated.
5.2 Vehicle requirements
5.2.1 Connections
Except for vehicles fitted with on board waste treatment system each vehicle with toilet waste or catering
area sink waste retention tank shall be fitted with a connection as shown in Figure 2 on each side of
vehicle. Vehicles fitted with on board waste treatment system are permitted to have the 3” connection on
one side, but it is preferable to have on both sides.
For toilet waste retention tanks each such vehicle, excluding locomotives, shall also be fitted with a
flushing connection as shown in Figure 3. On vehicles fitte
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