SIST EN 12806:2022

SLOVENSKI STANDARD
SIST EN 12806:2022
01-december-2022
Nadomešča:
SIST EN 12806:2003
Oprema in pribor za utekočinjeni naftni plin (UNP) - Sestavni deli pogonov
motornih vozil na UNP - Sestavni deli, razen posod za gorivo
LPG equipment and accessories - Automotive liquefied petroleum gas components -
Other than containers
Flüssiggas-Geräte und Ausrüstungsteile - Bauteile für Autogasanlagen/Treibgasanlagen
- Bauteile, ausgenommen Autogastanks
Équipements pour GPL et leurs accessoires - Composants pour véhicules au gaz de
pétrole liquéfié - Composants autres que le réservoir
Ta slovenski standard je istoveten z: EN 12806:2022
ICS:
43.060.40 Sistemi za gorivo Fuel systems
SIST EN 12806:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 12806:2022

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SIST EN 12806:2022


EN 12806
EUROPEAN STANDARD

NORME EUROPÉENNE

October 2022
EUROPÄISCHE NORM
ICS 43.060.40 Supersedes EN 12806:2003
English Version

LPG equipment and accessories - Automotive liquefied
petroleum gas components - Other than containers
Équipements pour GPL et leurs accessoires - Flüssiggas-Geräte und Ausrüstungsteile - Bauteile für
Composants pour véhicules au gaz de pétrole liquéfié - Autogasanlagen/Treibgasanlagen - Bauteile,
Composants autres que le réservoir ausgenommen Autogastanks
This European Standard was approved by CEN on 8 May 2022.

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, Türkiye 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12806:2022 E
worldwide for CEN national Members.

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SIST EN 12806:2022
EN 12806:2022 (E)
Contents Page
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviations . 8
3.1 Terms and definitions . 8
3.2 Abbreviations . 11
4 Technical requirements. 12
4.1 General . 12
4.2 General design rules . 13
4.3 Materials . 14
4.4 Design temperature . 14
5 Classification of components . 14
5.1 General . 14
5.2 Classification of automatic valves . 15
6 Construction and workmanship . 15
7 Tests . 15
7.1 General . 15
7.2 Overpressure test . 17
7.3 External leak tests. 17
7.4 Seat leak test . 18
7.5 Operational tests . 19
7.6 Endurance test . 22
7.7 Vibration test . 22
7.8 LPG compatibility test (for rubber materials) . 24
7.9 Corrosion resistance test . 25
7.10 Resistance to dry heat test . 25
7.11 Ozone ageing test . 26
7.12 Creep test . 26
7.13 Temperature cycle test . 26
8 Markings . 27
Annex A (informative) Classification of automotive LPG components . 28
Annex B (normative) Requirements for the components fitted in or on the container . 29
B.1 80 % stop valve . 29
B.2 Level indicator . 30
B.3 Float . 31
B.4 Pressure relief valve . 32
B.5 Remote-controlled service valve with excess flow valve . 33
B.6 Excess flow valve . 34
B.7 Pressure Relief Device (PRD) . 35
B.8 Manual shut-off container valve . 37
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SIST EN 12806:2022
EN 12806:2022 (E)
Annex C (normative) Requirements for the fuel pump . 38
C.1 Design criteria . 38
C.2 Specific design rules . 38
C.3 Test procedures . 38
Annex D (normative) Requirements for the gas-tight housing . 40
D.1 Design criteria . 40
D.2 Specific design rules . 40
D.3 Applicable tests . 40
Annex E (normative) Requirements for the power supply bushing. 41
E.1 Design criteria . 41
E.2 Specific design rules . 41
E.3 Applicable tests . 41
Annex F (normative) Requirements for the non-return valve . 42
F.1 Design criteria . 42
F.2 Specific design rules . 42
F.3 Applicable tests . 42
Annex G (normative) Requirements for the multi-valve . 43
G.1 Design criteria . 43
G.2 Specific design rules . 43
G.3 Applicable tests . 43
Annex H (normative) Requirements for the vaporizer/pressure regulator . 44
H.1 Design criteria . 44
H.2 Specific design rules . 44
H.3 Applicable tests . 44
Annex I (normative) Requirements for the remote-controlled shut-off valve . 46
I.1 Design criteria . 46
I.2 Specific design rules . 46
I.3 Applicable tests . 46
Annex J (normative) Requirements for LPG injectors and the mixing unit . 47
J.1 Injector . 47
J.2 Mixing unit . 48
Annex K (normative) Requirements for the LPG dosage unit . 49
K.1 Design criteria . 49
K.2 Specific design rules . 49
K.3 Applicable tests . 49
Annex L (normative) Requirements for the flexible hoses . 50
L.1 Design criteria . 50
L.2 Specific design rules . 50
L.3 Tests . 51
L.4 Markings . 57
Annex M (normative) Requirements for the hydrostatic relief valve . 58
M.1 Design criteria . 58
M.2 Specific design rules . 58
M.3 Applicable tests . 58
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SIST EN 12806:2022
EN 12806:2022 (E)
Annex N (normative) Requirements for the filter unit . 59
N.1 Design criteria . 59
N.2 Specific design rules . 59
N.3 Applicable tests . 59
Annex O (normative) Requirements for the pressure and/or temperature sensor . 61
O.1 Design criteria . 61
O.2 Specific design rules . 61
O.3 Applicable tests . 61
Annex P (normative) Requirements for the service coupling . 63
P.1 Design criteria . 63
P.2 Specific design rules . 63
P.3 Applicable tests procedure . 63
Annex Q (normative) Requirements for the Electronic Control Unit (ECU) . 64
Q.1 Design criteria . 64
Q.2 Specific design rules . 64
Annex R (normative) Requirements for the fuel rail . 65
R.1 Design criteria . 65
R.2 Specific design rules . 65
R.3 Applicable tests . 65
Annex S (normative) Requirements for the filling unit . 67
S.1 Design criteria . 67
S.2 Specific design rules . 67
S.3 Applicable tests . 68
S.4 Main dimensions of different types of vehicle filling units in use in Europe . 70
Annex T (normative) Gas tube(s) . 74
T.1 General provisions . 74
T.2 Gas tubes of seamless type made of either copper or stainless steel or steel with
corrosion-resistant coating . 74
T.3 Gas tube(s) of non-seamless type, gas tube(s) made of materials other than copper,
stainless steel, and steel with corrosion-resistant coating, and their couplings . 74
Annex U (normative) Interconnected LPG systems . 77
U.1 Specific provisions for components of interconnected LPG-systems. 77
Bibliography . 80

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SIST EN 12806:2022
EN 12806:2022 (E)
European foreword
This document (EN 12806:2022) has been prepared by Technical Committee CEN/TC 286 “LPG
equipment and accessories”, the secretariat of which is held by NSAI.
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 April 2023, and conflicting national standards shall be
withdrawn at the latest by April 2023.
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 12806:2003.
In comparison with the previous edition, the following technical modifications have been made:
— Revised definitions;
— Updated normative references;
— General reference to maximum allowable pressure rather than design or test pressure;
— Addition of a new component ("Manual shut-off container valve") and the relative subclause B.8;
— General revision of the Annexes.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the
United Kingdom.
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SIST EN 12806:2022
EN 12806:2022 (E)
Introduction
Protection of the environment is a key political issue in Europe and elsewhere. For CEN/TC 286, this is
covered in CEN/TS 16765 [7] and this Technical Specification should be read in conjunction with this
document. The Technical Specification provides guidance on the environmental aspects to be
considered regarding equipment and accessories produced for the LPG industry and the following is
addressed:
a) design;
b) manufacture;
c) packaging;
d) use and operation; and
e) disposal.
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SIST EN 12806:2022
EN 12806:2022 (E)
1 Scope
This document specifies the general design and testing requirements for all components in automotive
Liquefied Petroleum Gas (LPG) propulsion systems, which have a maximum allowable pressure equal to
or greater than 20 kPa.
This document also specifies the requirements for the Electric Control Unit (ECU), which is not
subjected to pressure, and the gas-tight housing which has a maximum allowable pressure below
20 kPa.
This document does not apply to containers.
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 549:2019, Rubber materials for seals and diaphragms for gas appliances and gas equipment
EN 589, Automotive fuels - LPG - Requirements and test methods
EN 22768-1, General tolerances - Part 1: Tolerances for linear and angular dimensions without individual
tolerance indications (ISO 2768-1)
EN 60529, Degrees of protection provided by enclosures (IP code)
EN IEC 60068-2-52, Environmental testing - Part 2-52: Tests - Test Kb: Salt mist, cyclic (sodium chloride
solution)
EN ISO 1307:2008, Rubber and plastics hoses - Hose sizes, minimum and maximum inside diameters, and
tolerances on cut-to-length hoses (ISO 1307:2006)
EN ISO 1402, Rubber and plastics hoses and hose assemblies - Hydrostatic testing (ISO 1402)
EN ISO 4080, Rubber and plastics hoses and hose assemblies - Determination of permeability to gas (ISO
4080)
EN ISO 8031, Rubber and plastics hoses and hose assemblies - Determination of electrical resistance and
conductivity (ISO 8031)
EN ISO 9227, Corrosion tests in artificial atmospheres - Salt spray tests (ISO 9227)
EN ISO 10619-2:2021, Rubber and plastics hoses and tubing - Measurement of flexibility and stiffness -
Part 2: Bending tests at sub-ambient temperatures (ISO 10619-2:2021)
ISO 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
ISO 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat-resistance tests
ISO 1431-1, Rubber, vulcanized or thermoplastic — Resistance to ozone cracking — Part 1: Static and
dynamic strain testing
ISO 1436, Rubber hoses and hose assemblies — Wire-braid-reinforced hydraulic types for oil-based or
water-based fluids — Specification
ISO 1817, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids
ISO 6957, Copper alloys — Ammonia test for stress corrosion resistance
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SIST EN 12806:2022
EN 12806:2022 (E)
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological 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/
3.1.1
pressure
gauge pressure, unless otherwise stated
3.1.2
test pressure
pressure to which the component, or an assembly of components, is subjected during the test
3.1.3
maximum allowable pressure
maximum pressure for which the equipment is designed
Note 1 to entry: All pressures are gauge pressures, unless otherwise stated.
3.1.4
fusible plug
component protecting the pressure vessel from bursting by venting the LPG content at a pre-set
temperature
3.1.5
automotive LPG-system
assembly of components enabling a vehicle to use automotive LPG in its propulsion system
Note 1 to entry: Requirements for each component are specified in their specific annexes (see Table 1 and
Table 2).
3.1.6
container
pressure vessel used for the storage of automotive LPG
3.1.7
80 % stop valve
device that limits the filling of the container to 80 % of its water capacity and acts as a non-return valve
3.1.8
level indicator
device that indicates the liquid level in the container
3.1.9
float
device, which may be used in the 80 % stop valve and/or the level indicator, floating on the surface of
the liquid to detect the liquid level in the container
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SIST EN 12806:2022
EN 12806:2022 (E)
3.1.10
pressure relief valve
PRV
self-closing valve which automatically, without the assistance of any energy other than that of the
vapour concerned, discharges vapour at a predetermined pressure, and operates with a pop action
Note 1 to entry: This is known as a "safety valve" in ADR.
3.1.11
remote-controlled service valve with excess flow valve
device that allows or interrupts the LPG supply to the vaporizer/pressure regulator which is operated
remotely and is combined with an excess flow valve
3.1.12
excess flow valve
valve designed to close automatically, with a small residual flow, when the fluid flow passing through it
exceeds a predetermined value, and to re-open when the pressure differential across the valve has been
restored below a certain value
3.1.13
pressure relief device
PRD
device protecting the container from bursting, when exposed to fire, by venting LPG at a pre-set
temperature and/or pressure
3.1.14
fuel pump
device that pumps liquid LPG to the engine fuel system
3.1.15
gas-tight housing
device that vents any leak from components fitted to the container to the venting tube
Note 1 to entry: It also collects and ducts any leaks to the outside of the vehicle, where necessary through a
connecting hose and a lead-through.
3.1.16
power supply bushing
gas-tight electrical power conductor for components installed inside the container
3.1.17
non-return valve
valve designed
...