EN 16657:2016+A1:2018
(Main + Amendment)Tanks for the transport of dangerous goods - Transport tank equipment for overfill prevention devices for static tanks
General Information
- Abstract
This European Standard specifies the minimum performance and construction requirements for overfill prevention controllers located on the tank vehicle.
This European Standard applies to overfill prevention controllers for liquid fuels, having a flash point up to but not exceeding 100 °C.
The requirements apply to overfill prevention controllers suitable for use at ambient temperatures in the range from 25 °C to +60 °C, and subject to normal operational pressure variations.
- Status
- Published
- Publication Date
- 26-Jun-2018
- Technical Committee
- CEN/TC 296 - Tanks for transport of dangerous goods
- Drafting Committee
- CEN/TC 296/WG 8 - Electronic equipment and products
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 03-Dec-2021
- Completion Date
- 17-Sep-2026
Overview
EN 16657:2016+A1:2018 is a CEN European Standard that defines minimum performance and construction requirements for overfill prevention controllers located on tank vehicles used to deliver liquid fuels to static tanks. It applies to fuel products with a flash point up to (and not exceeding) 100 °C and to controllers intended to operate in ambient temperatures from −25 °C to +60 °C under normal operational pressure variations. The standard focuses on safe, reliable detection and automatic stopping of product flow to prevent tank overfilling.
Key Topics and Requirements
- Scope & application: Controllers on tank vehicles that interface with sensors mounted on static tanks to prevent overfill during refuelling operations.
- Safety / effectiveness: Power supply failure, sensor non‑permissive signals, short circuits or interruptions must prevent or stop product flow. Stopping flow must not create pressure exceeding system design limits.
- Response times:
- Sensor reaction (permissive → non‑permissive): max 1.5 s (per EN 13616-2).
- Controller reaction (permissive → non‑permissive): max 1 s.
- Controller output to cessation of product flow: max 3 s.
- Maximum total time from liquid detection to flow stop: 5.5 s.
- Electrical / intrinsically safe parameters:
- Measuring circuit voltage: 19.0 ± 0.3 V, stable across temperature and up to 80 mA load.
- Ex safety rating for powering sensors: at least Ex ia IIB T3 (EN 60079 series).
- Maximum sensor output limits in the controller: U0 = 25 V, I0 = 165 mA, P0 = 1 W.
- EMC and vehicle transient immunity: Must meet EN 61000‑6‑3 (emission) and EN 61000‑6‑1 (immunity); resilient to ISO 7637‑2 transient pulses.
- Interfaces and connectors: Mechanical socket and plug types are defined to mate with EN 13616‑2 sensors; digital/binary interfaces and optional auxiliary (“listener”) contacts are supported for Product Recognition Device (PRD) / crossover prevention.
- Testing & marking: Type tests (performance, fail‑safe, EMC), manufacturer production tests, and specific interface tests are required; marking and documentation requirements are specified.
Applications and Users
- Who uses this standard:
- Manufacturers of overfill prevention controllers, sensors and connectors
- Tank‑vehicle OEMs and system integrators
- Fuel distribution companies and tank farm operators
- Certification bodies, conformity assessors and safety inspectors
- Procurement and regulatory compliance teams
- Practical applications:
- Design and production of intrinsically safe controller units for fuel delivery vehicles
- Installation and commissioning of overfill prevention systems for static tanks
- Test procedures for type approval and factory production checks
- Ensuring interoperability between tank‑vehicle controllers, sensors and PRDs for safe refuelling
Related Standards
- EN 13616‑2 (Overfill prevention devices for static tanks - Part 2)
- EN 14116 (Digital interface for Product Recognition Devices)
- EN 60079‑0, EN 60079‑11 (explosive atmospheres / intrinsic safety)
- EN 61000‑6‑1, EN 61000‑6‑3 (EMC)
- ISO 7637‑2 (vehicle electrical transients)
- EN ISO 13849‑1 (safety-related control systems)
Keywords: EN 16657:2016+A1:2018, overfill prevention controller, tank vehicle, static tanks, fuel overfill protection, intrinsic safety, EMC, PRD.
Relations
- Effective Date
- 18-Jan-2023
- Effective Date
- 11-Apr-2018
- Effective Date
- 02-Jun-2026
- Effective Date
- 09-Feb-2026
- Refers
EN IEC 60079-11:2024 - Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i" - Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Get Certified
Connect with accredited certification bodies for this standard
Element Materials Technology
Materials testing and product certification.
Kiwa BDA Testing
Building and construction product certification.
ABS Group Brazil
ABS Group certification services in Brazil.
Sponsored listings
Frequently Asked Questions
EN 16657:2016+A1:2018 is a standard published by the European Committee for Standardization (CEN). Its full title is "Tanks for the transport of dangerous goods - Transport tank equipment for overfill prevention devices for static tanks". This standard covers: This European Standard specifies the minimum performance and construction requirements for overfill prevention controllers located on the tank vehicle. This European Standard applies to overfill prevention controllers for liquid fuels, having a flash point up to but not exceeding 100 °C. The requirements apply to overfill prevention controllers suitable for use at ambient temperatures in the range from 25 °C to +60 °C, and subject to normal operational pressure variations.
This European Standard specifies the minimum performance and construction requirements for overfill prevention controllers located on the tank vehicle. This European Standard applies to overfill prevention controllers for liquid fuels, having a flash point up to but not exceeding 100 °C. The requirements apply to overfill prevention controllers suitable for use at ambient temperatures in the range from 25 °C to +60 °C, and subject to normal operational pressure variations.
EN 16657:2016+A1:2018 is classified under the following ICS (International Classification for Standards) categories: 13.300 - Protection against dangerous goods; 23.020.10 - Stationary containers and tanks; 23.020.20 - Vessels and containers mounted on vehicles; 75.200 - Petroleum products and natural gas handling equipment. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 16657:2016+A1:2018 has the following relationships with other standards: It is inter standard links to EN 16657:2016/prA1, EN 16657:2016, EN IEC 61000-6-3:2026, EN IEC 61000-6-1:2019, EN IEC 60079-11:2024, EN IEC 61000-6-3:2021, EN IEC 60079-0:2018, ISO 7637-2:2011, EN ISO 13849-1:2023, EN 13616-2:2016, EN 14116:2012+A2:2018, EN 15969-1:2015, EN 13341:2005+A1:2011, EN 15969-1:2011, EN 13575:2012. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 16657:2016+A1:2018 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Tanks für die Beförderung gefährlicher Güter - Transporttankausrüstung für Überfüllsicherungen für ortsfeste TanksCiternes destinées au transport de matières dangereuses - Dispositifs limiteurs de remplissage pour réservoirs statiques à bord de véhicules-citernesTanks for the transport of dangerous goods - Transport tank equipment for overfill prevention devices for static tanks23.020.20Posode in vsebniki, montirani na vozilaVessels and containers mounted on vehicles13.300Varstvo pred nevarnimi izdelkiProtection against dangerous goodsICS:Ta slovenski standard je istoveten z:EN 16657:2016+A1:2018SIST EN 16657:2016+A1:2018en,fr,de01-november-2018SIST EN 16657:2016+A1:2018SLOVENSKI
STANDARDSIST EN 16657:20161DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16657:2016+A1
June
t r s z ICS
s uä u r râ
t uä r t rä s râ
t uä r t rä t râ
y wä t r r Supersedes EN
s x x w yã t r s xEnglish Version
Tanks for the transport of dangerous goods æ Transport tank equipment for overfill prevention devices for static tanks Citernes destinées au transport de matières dangereuses æ Dispositifs limiteurs de remplissage pour réservoirs statiques à bord de véhiculesæciternes Tanks für die Beförderung gefährlicher Güter æ Transporttankausrüstung für Überfüllsicherungen für ortsfeste Tanks This European Standard was approved by CEN on
x June
t r s w and includes Amendment
s approved by CEN on
t z December
t r s yä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels
t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s x x w yã t r s x ªA sã t r s z ESIST EN 16657:2016+A1:2018
The controller shall be of a durable construction. The selection of materials and manufacturing processes shall consider environmental aspects. 5 Overfill prevention device 5.1 Equipment on the tank A sensor with mechanical interface shall be according to EN 13616-2.
...