CEN/CLC Guide 38:2021

SLOVENSKI STANDARD
01-december-2021
Vodilo za bencinske črpalke
Guide for multifuel stations
Ta slovenski standard je istoveten z: CEN/CLC Guide 38:2021
ICS:
75.200 Oprema za skladiščenje Petroleum products and
nafte, naftnih proizvodov in natural gas handling
zemeljskega plina equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN-CENELEC
GUIDE
Guide for multifuel stations
Edition 1, 2021-10
CEN and CENELEC decided to adopt this new CEN-CENELEC Guide 38 through CEN Resolution
BT N 12651 and CENELEC Decision BT169/DG12327/DV.

European Committee for Standardization
European Committee for Electrotechnical Standardization
Rue de la Science 23
B–1040 Brussels – Belgium
Tel: +32 2 550 08 11
Fax: +32 2 550 08 19
www.cen.eu
www.cenelec.eu
www.cencenelec.eu
CEN-CLC Guide 38:2021 (E)
Contents Page
European foreword .4
Introduction .5
1 Scope .6
2 Normative references .6
3 Terms and definitions .6
4 Safety of a multi energy station .8
4.1 General .8
4.2 Internal separation distances .8
4.2.1 General .8
4.2.2 Prescriptive separation distances .8
4.2.3 Concepts for separation distances. 10
4.3 Combined activities . 10
4.4 Process Shutdown and ESD functionality . 10
4.4.1 General philosophy . 10
4.4.2 ESD 3 . 11
4.4.3 Process shut down or stop button . 12
4.4.4 ESD 2 . 13
4.4.5 Functionality of an ESD system . 15
Annex A (informative) List of terms and definitions used in fuel station standards . 17
Annex B (informative) Requirements addressed in fuel station standards . 72
Bibliography . 76

CEN-CLC Guide 38:2021 (E)
European foreword
CEN and CENELEC develop European Standards (EN) and other publications, including Technical
Specifications (TS), Technical Reports (TR) and Workshop Agreements (CWA). The European
Standardization System has made a significant contribution to the creation of a common European
market, embedded in a global economy, and in disseminating the knowledge incorporated in these
publications through its network of CEN and CENELEC (national) Members.
To accelerate the development of alternative fuels, CEN and CENELEC developed this Guide 38 to
facilitate the integration of alternative fuels at existing fuelling stations and to give guidance to design,
authorize and operate new multi fuel stations with different fuels in support of the Directive
2014/94/EU of the European Parliament and of the Council of 22 October 2014 on the deployment of
alternative fuels infrastructure. Other EU legislations considered as relevant are listed in the
Bibliography: ATEX, PED, MID (other EU Directives or Regulations might apply).
CEN-CLC Guide 38:2021 (E)
Introduction
The transport sector contributes to the Greenhouse Gas emissions, and it will also contribute to the
Energy Transition. In addition to improved efficiency and reduction in fuel consumption, the European
Commission is targeting the development of alternative fuels.
The Directive 2014/94/EU of the European Parliament and of the Council of 22 October 2014 on the
deployment of alternative fuels infrastructure was published to facilitate the development of alternative
fuels and achieve interoperability throughout Europe. This Directive was requesting technical
specifications for recharging points, hydrogen refuelling points for motor vehicles and natural gas
refuelling points. These standards have been published by the relevant CEN and CENELEC Technical
Committees (CEN/TC 301, CLC/TC 69X, eMCG, CEN/TC 268, CEN/TC 326 and CEN/TC 408).
To facilitate the integration of alternative fuels in existing stations, CEN and CENELEC organized a
workshop in February 2019 with the relevant CEN and CENELEC Technical Committees (the TCs
already involved in Directive 2014/94/EU plus CEN/TC 286 and CEN/TC 393) and with the relevant
European Associations (Fuels Europe, Europe’s Independent Fuel Suppliers, Liquid Gas Europe, NGVA
Europe). The existing standards and regulations for each fuel were presented. Four topics were
identified as requiring guidance to facilitate the coexistence of different fuels:
— Emergency Shut Down procedure
— Common language – aligned terms
— Common approach of risk assessment
— Covered requirements in standards
The Working Group "Multifuel stations" was launched by the CEN-CLC Sector Forum Gas Infrastructure
(SFG-I) to draft CEN-CLC Guide 38. This Guide was submitted to the relevant CEN and CENELEC
Technical Committees (CEN-CLC/JTC 6, CEN/TC 301, CLC/TC 69X, eMCG, CEN/TC 268, CEN/TC 286,
CEN/TC 326, CEN/TC 393 and CEN/TC 408) and it was approved by the CEN and CENELEC BTs.
The intention of this document is to enable the relevant TCs to cover interaction with other fuels when
they revise their standards and improve alignment with other standards. It does not intend to cover all
the requirements to be applied in a multifuel station.
At a later stage, further items were identified that will require common agreement: labelling, ignition
sources, fire extinguishers, emergency response, time for emergency shutdown.
CEN-CLC Guide 38:2021 (E)
1 Scope
This document provides guidance on multifuel stations. It was prepared to facilitate the integration of
alternative fuels in existing fuelling stations and to facilitate the design, authorization and operation of
multifuel stations.
This document compares the terms and definitions used in a selection of standards applicable to each
fuel: electricity, hydrogen, compressed and liquefied natural gas, LPG, diesel and petrol.
It compares the requirements addressed in these standards for each fuel.
It describes the internal and external separation distances applied for different fuels.
It gives guidance on the design and operation of Emergency Shut Down systems and on combined
activities.
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 13617-1:2012, Petrol filling stations - Part 1: Safety requirements for construction and performance of
metering pumps, dispensers and remote pumping units
EN 14678-1:2013, LPG equipment and accessories - Construction and performance of LPG equipment for
automotive filling stations - Part 1: Dispensers
EN 14678-2:2007+A1:2012, LPG equipment and accessories - Construction and performance of LPG
equipment for automotive filling stations - Part 2; Components other than dispensers, and installation
requirements
EN 14678-3:2013, LPG equipment and accessories - Construction and performance of LPG equipment for
automotive filling stations - Part 3: Refuelling installations at private and industrial premises
EN ISO 16923:2018, Natural gas fuelling stations — CNG stations for fuelling vehicles
EN ISO 16924:2018, Natural gas fuelling stations — LNG stations for fuelling vehicles
ISO 19880-1:2020, Gaseous hydrogen — Fuelling stations — Part 1: General requirements
IEC 61851-1:2019, Electric vehicle conductive charging system - Part 1 : general requirements
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
The relevant CEN and CENELEC Technical Committees are encouraged to use these terms and
definitions in their standards.
The terms and definitions used for the different fuels in the standards listed in Clause 2 are compared in
Annex A.
CEN-CLC Guide 38:2021 (E)
3.1
emergency shutdown system
ESD
system composed of sensors, logic solvers, and final control elements for the purpose of taking the
process, or specific equipment in the process, to a safe state when predetermined conditions are
violated
Note 1 to entry: The system is designed to isolate, de-energize, shutdown, or depressurize where appropriate,
equipment in a unit. Depressurization can be used for cryogenic liquids or parts of hydrogen systems.
3.2
fail-safe
capable to go to a predetermined safe state in the event of a specific malfunction
3.3
fuelling island
installation where single or multiple fuel dispensers, or refuelling points, for refuelling of road vehicles
are located
Note 1 to entry: Typically part of a facility containing multiple fuelling islands, with measures installed on each
island to protect the refuelling equipment from being impacted by vehicles (e.g. raised kerb and/or impact
protection barriers).
3.4
multi-fuel station
facility for the refuelling of road vehicles providing a selection of fuel types, and including facilities for
the supply of fuel to the facility, fuel storage and the fuel delivery equipment
Note 1 to entry: Multi-fuel stations may also include a charging, or recharging, infrastructure for battery electric
vehicles.
Note 2 to entry: Often referred to as fuelling station, refuelling station, filling station or service station.
3.5
process shutdown
system composed of sensors, logic solvers, and final control elements for the purpose of taking the part
of the process, or specific equipment in the process, to a safe state when predetermined conditions are
violated
3.6
separation distance
distance to acceptable risk level or minimum risk-informed distance between a hazard source and a
target (human, equipment or environment), which will mitigate the effect of a likely foreseeable
incident and prevent a minor incident from escalating into a larger incident
Note 1 to entry: The term "separation distance" may also be referred to as "safe distance", "safety distance" or
"setback distance".
[SOURCE: ISO 19880-1:2020, 3.70]
CEN-CLC Guide 38:2021 (E)
4 Safety of a multi energy station
4.1 General
At a fuelling station, different (alternative) fuels including electric charging can be offered. For each fuel,
separate standards are available. However, there is no description of how the different fuels should
interact in case of an emergency. The goal of this guidance is to describe the measures that can prevent
a minor incident with one of the fuels at a multifuel station from escalating into a larger incident.
The regulations and standards for traditional fuels like petrol and diesel have existed for many years.
Today, alternative fuels such as LPG, CNG, LNG and hydrogen and electric charging are being
introduced. Several other fuels are under development, but as previously mentioned the focus of this
document is on commercially available alternative fuels. The safety procedures in case of an emergency
are written down separately in the standard for each individual fuel. This guidance will describe the
interaction between the fuels and technical installations at a multifuel station.
There are three main focus areas in the case of multifuel stations:
1) internal and external separation distances;
2) combined activities;
3) ESD action.
4.2 Internal separation distances
4.2.1 General
As mentioned, the standards for the individual fuels already exist (see Clause 2). Some standards
require separation distances, some give concepts to define these distances and for others the distances
are defined by national regulations and/or standards. The
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