GRSG
Session 114 | Geneva | 9-13 Apr 2018
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Agenda Item 6. (b)
Amendments to gas-fuelled vehicle regulations: Regulation No. 110 (CNG and LNG vehicles)

28. The expert from Germany introduced GRSG-114-10 on the outcome of the task force on ECE/TRANS/WP.29/GRSG/2017/17 which was on improving the provisions for installing and inspecting Compressed Natural Gas (CNG) cylinders or Liquefied Natural Gas (LNG) tanks and their accessories. The expert from Italy preferred a more accurate inspection of such containers without the removal of structural parts (GRSG-114-19). After discussion, GRSG agreed to add design requirements that allow easy periodical technical inspections. The expert from the Netherlands requested that container manufacturers provide more detailed recommendations for periodical technical inspections and for periodic requalification tests, and requested that these recommendations be stored and made available for all inspections.

29. The expert from OICA presented GRSG-114-26 proposing to amend the specifications for inspection of CNG-cylinders / LNG-tanks and their accessories. GRSG did not support the proposal.

30. Finally, GRSG considered a revised proposal (GRSG-114-10-Rev.1) and adopted ECE/TRANS/WP.29/GRSG/2017/17 as reproduced below. The secretariat was requested to submit the proposal to WP.29 and AC.1 as draft Supplement 1 to the 03 series of amendments to UN Regulation No. 110 for consideration at their November 2018 sessions.

Insert a new paragraph 18.1.6.1., to read:

18.1.6.1.Notwithstanding the provisions of paragraph 18.1.6., it shall be possible to make an external inspection (e.g. for Periodic Technical Inspection) of the CNG cylinder or LNG tank and their accessories according to the specifications of the manufacturer, without the use of tools to dismantle, but with visual aids, e.g. lamps, mirrors or endoscopes.

31. The expert from Italy, in reference to ECE/TRANS/WP.29/GRSG/2017/29, proposed to amend Annex 3A of the Regulation, i.e. the test requirements for the periodic requalification of CNG cylinders to avoid structural failures during their service life (GRSG-114-32), including new provisions for a mandatory impact damage test for all cylinders without the use of shoulder pads. GRSG welcomed the specific test reports provided by Italy on CNG4 cylinders (GRSG-114-07, GRSG-114-14, GRSG-114-15). GRSG noted concerns and comments. Finally, GRSG agreed to refer it to the task force and to resume consideration of this subject at its next session on the basis of a revised official document.

32. The expert from NGV Global introduced ECE/TRANS/WP.29/GRSG/2018/3 that proposed to correct Table 6.4 on the cylinder design qualification tests. GRSG adopted the proposal and requested the secretariat to submit the proposal to WP.29 and AC.1, for consideration at their November 2018 sessions, as Corrigendum 1 to Revision 3 of UN Regulation No. 110.

33. The expert from the Netherlands presented GRSG-114-03 on new requirements for components used in LNG/CNG systems such as the “CNG accumulator” and the “CNG compressor”. GRSG noted no objection on the proposal and agreed to consider it in detail at its next session on the basis of an official document.

34. The expert from the Netherlands introduced GRSG-114-06 to allow the use of gas fuelled generators to provide electrical power for accessories or other vehicle systems. The expert from the United Kingdom suggested simplifying the text and referring to a secondary engine only. GRSG noted the general support for GRSG-114-06-Rev.1 and requested the secretariat to circulate it with an official symbol at the next GRSG session for a final review.

35. The expert from OICA sought the advice of GRSG on GRSG-114-27 that adapts the text of the Regulation to the current technology on the gas flow adjustor in the carburettor or injector. GRSG endorsed the proposal in principle and agreed to resume consideration at the next session of GRSG on the basis of an official document.

Documentation
GRSG-114-03 | UN R110: Proposal for amendments (Netherlands)
GRSG-114-06/Rev.1 | UN R110: Proposal for amendments to reduce venting via new technologies (Netherlands)
GRSG-114-07 | UN R110: Information in support of GRSG/2017/29 (Italy)
GRSG-114-08 | Report on the 1st meeting of the GRSG Task Force on "Gas-fueled vehicle regulations" (Germany)
GRSG-114-10/Rev.1 | UN R110: Proposal for the 03 series of amendments (Germany)
GRSG-114-14 | UN R110: Specific tests on CNG4 cylinders- Provider 1 (Italy)
GRSG-114-15 | UN R110: Specific tests on CNG4 cylinders - Provider 2 (Italy)
GRSG-114-19 | UN R110: Proposal for the 03 series of amendments (Italy)
GRSG-114-26 | UN R110: Proposal for amendments with regard to visual inspections (OICA)
GRSG-114-27 | UN R110: Proposal for amendments concerning gas flow adjuster (OICA)
GRSG-114-32 | UN R110: Presentation on amendments with regard to CNG4 cylinders (Italy)
GRSG/2017/17 | Proposal for the 03 series of amendments to Regulation No. 110 (Germany)
GRSG/2017/29 | Proposal for amendments to Regulation No. 110 (Italy)
GRSG/2018/3 | UN R110: Proposal for Corrigendum 1 to Revision 3 (LG Europe and ISO)