UN R110: Proposal for amendments
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Proposal to add provisions for excess flow valves (EFV) which can shut off fuel flow at the time of operation to specific components.

Reference Number: GRSG-119-20
Origin: OICA
Date: 6 October 2020
Proposal Status: Superseded
Related Documents:
GRSG-119-21 | UN R110: Supporting information regarding shut-off valve proposal
GRSG/2021/10 | UN R110: Proposal for amendments
Working Party on General Safety | Session 119 | 6-9 Oct 2020

46. The expert from OICA introduced GRSG-119-21, a proposal for amendments to UN Regulation No. 110, related to the definition of “Excess flow valve” to differentiate between pressure-equalization type and shut-off type excess flow valves, and to CNG system requirements, as elaborated in GRSG-119-20.

47. Following detailed technical discussions, including comments from representatives from the Netherlands, Sweden and NGV Global, GRSG requested the submission of a revised version of GRSG-119-20, based on further consideration and discussions among interested stakeholders, as an official document for consideration at the April 2021 session of GRSG, inviting interested stakeholders to deliver their remarks and comments to OICA.