SIST EN 13856:2026

• Abstract:

  This document specifies the minimum requirements for the contents of the user manual for Automotive LPG propulsion systems fitted in road vehicles.; This document does not cover the user manual for forklift trucks or other industrial machinery.

• Status: Published
• Public Enquiry End Date: 02-Jan-2025
• Publication Date: 21-Jul-2026
• ICS: 43.060.40 - Fuel systems
• ICS: 75.160.30 - Gaseous fuels
• Technical Committee: TLP - Pressure vessels
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 04-Jun-2026
• Due Date: 09-Aug-2026
• Completion Date: 22-Jul-2026
• Ref Project: EN 13856:2026 - LPG equipment and accessories - Minimum requirements for the content of the user manual for automotive LPG systems

• Replaces: SIST EN 13856:2002 - Minimum requirements for the content of the user manual for automotive LPG systems
• Effective Date: 01-Sep-2026

Overview

SIST EN 13856:2026 specifies the minimum requirements for the content of user manuals for automotive LPG systems installed in road vehicles. Developed by the Slovenian Institute for Standardization (SIST) and CEN/TC 286, this standard ensures that automotive LPG user manuals are comprehensive, ensuring safe and correct operation by vehicle users. Importantly, SIST EN 13856:2026 does not apply to user manuals for forklift trucks or other industrial machinery, focusing exclusively on road vehicles.

This standard supports enhanced safety and compliance across European markets by providing clear guidelines for manufacturers and installers of LPG equipment and accessories. Properly written user manuals, as mandated by SIST EN 13856:2026, promote user awareness of the system’s technical specifications, operational procedures, and safety protocols.

Keywords: LPG systems, automotive LPG, user manual requirements, road vehicle safety, LPG system documentation

Key Topics

The main topics addressed in SIST EN 13856:2026 include:

• Technical specifications: Clear description of the LPG system and its main components, fuel properties, as well as guidance on running in and tuning procedures.
• Safety instructions: Comprehensive information for safe system use, dangers of misuse, procedures for addressing gas leaks, effects of environmental conditions, the critical 80% maximum filling level, and relevant national regulations for parking, maintenance, and re-approval.
• Operation of the LPG system: Directions for filling the LPG container, procedures for switching fuel types, operation of manual valves, and proper use of level indicators with focus on safety limits.
• Maintenance: Required maintenance frequencies and types, with an emphasis on work to be performed by competent personnel. Special procedures, such as those required during vehicle repainting, are outlined.
• Defects and repair: Steps to address faults and perform repairs, including guidance on the use of diagnostic systems when present.

Applications

SIST EN 13856:2026 is especially relevant for:

• LPG System Manufacturers: Ensuring their automotive LPG hardware is accompanied by compliant user manuals, as required for European market access.
• Automotive Installers: Assisting professionals in installing and commissioning LPG systems in road vehicles according to strict user communication standards.
• Vehicle Fleet Operators: Increasing operational safety and reliability of LPG-powered fleets by distributing standardized, easy-to-understand user manuals to drivers.
• Regulatory Authorities: Facilitating inspection and approval processes for automotive LPG systems by promoting harmonized documentation requirements.
• End Users/Vehicle Owners: Ensuring that drivers and vehicle owners have clear, reliable information on the safe and efficient use of LPG-powered vehicles.

Related Standards

For comprehensive safety and environmental compliance, the following standards are closely associated with SIST EN 13856:2026:

• CEN/TS 16765: LPG equipment and accessories - Environmental considerations for CEN/TC 286 standards
• prEN 12805: Automotive liquefied petroleum gas components - Containers
• EN 12806: Automotive liquefied petroleum gas components - Other than containers
• EN 16652-2: LPG equipment and accessories - Automotive LPG vehicles workshops - Part 2: Personnel competence and training

These referenced standards support SIST EN 13856:2026 by detailing component requirements, environmental safeguards, and maintenance personnel qualifications, ensuring all aspects of LPG automotive system safety and usability.

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By adhering to SIST EN 13856:2026, manufacturers, installers, and users help ensure the safe, efficient, and compliant use of LPG systems in road vehicles, contributing to both user safety and environmental responsibility.

SLOVENSKI STANDARD
01-september-2026
Nadomešča:
SIST EN 13856:2002
Oprema in pribor za utekočinjeni naftni plin (UNP) - Minimalne zahteve za vsebino
navodila za uporabo UNP v sistemih za pogon motornih vozil
LPG equipment and accessories - Minimum requirements for the content of the user
manual for automotive LPG systems
Flüssiggas-Geräte und Ausrüstungsteile - Mindestanforderungen an den Inhalt von
Betriebsanleitungen für Autogasanlagen
Équipements pour GPL et leurs accessoires - Exigences d’utilisation pour les systèmes
GPL pour automobiles
Ta slovenski standard je istoveten z: EN 13856:2026
ICS:
43.060.40 Sistemi za gorivo Fuel systems
75.160.30 Plinska goriva Gaseous fuels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 13856
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2026
EUROPÄISCHE NORM
ICS 43.060.40 Supersedes EN 13856:2002
English Version
LPG equipment and accessories - Minimum requirements
for the content of the user manual for automotive LPG
systems
Équipements pour GPL et leurs accessoires - Exigences Flüssiggas-Geräte und Ausrüstungsteile -
d'utilisation pour les systèmes GPL pour automobiles Mindestanforderungen an den Inhalt von
Betriebsanleitungen für Autogasanlagen
This European Standard was approved by CEN on 13 April 2026.

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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13856:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General. 5
5 Contents of the user manual . 5
5.1 LPG system description . 5
5.2 Safety instructions . 6
5.3 Operation of the LPG system . 6
5.3.1 Filling of the LPG container . 6
5.3.2 Switch-over procedure . 6
5.3.3 Opening / closing of manual valves when fitted . 6
5.3.4 Level indicator . 6
5.4 Maintenance . 6
5.5 Defects and repair . 6
Bibliography . 7
European foreword
This document (EN 13856:2026) 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 December 2026, and conflicting national standards shall
be withdrawn at the latest by December 2026.
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 13856:2002.
The main changes in EN 13856:2026 compared to EN 13856:2002 are:
— clarification of the content of the user manual, now made by the “LPG system description” and the
“Safety instruction” sections;
— improved general terminology and wording;
— updated maintenance paragraph, with the reference to EN 16652-2 for competence of operators.
Any feedback and questions on this document should be directed
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