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Natural gas fuelling stations - LNG unloading connector; German version EN 17921:2024


This document provides the design for an unloading coupling for LNG tank trailers for unloading at LNG fuelling stations or LNG rail tenders. This document includes requirements for (at least): ― technical layout description of the LNG tank trailer/rail tender coupling; ― technical layout description of the unloading coupling ― location of the unloading point at the tank trailer/rail tender





Planned document number

DIN EN 17921

Project number


Responsible national committee

NA 032-03-07 AA - Gas supply for vehicles operating on natural gas  

Responsible european committee

CEN/TC 326/WG 4 - LNG Fuelling Stations  

draft standard

Natural gas vehicles - Fuelling and operation - Natural gas fuelling stations - LNG unloading connector; German and English version prEN 17921:2022
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