Presentation highlighting concerns regarding the separate development of UN R110 and ISO 11439 provisions resulting in diverging test protocols and other differences.

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ISO Standard 11439 concerns “High pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehicles”. ISO 6722 concerns ’60 V and 600 V single-core cables — Part 1: Dimensions, test methods and requirements for copper conductor cables".

Proposal to harmonize UN R110 with standard ISO 11439:2013 on high pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehicles.

Proposal to align the CNG cylinder requirements in Regulation No. 110 with requirements in ISO 11439: 2013.

Proposal to harmonize UN R110 with standard ISO 11439:2013 on high pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehicles.

Detailed review of the proposed changes to UN R110.

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Proposal to

1. Update the standards to note that all references to standards are always to the latest version unless stated otherwise.
2. Update Annex II with: Series of PRD/TPRD’s are not allowed
3. Update A.24 with the pressure relief device shall comply with the requirements given in annex 4A for the specific type
4. Update Annex 4A para 4 and para 7 with reference to ISO15500-13.

Presentation in support of GRSG/2017/22 (Proposal to harmonize UN R110 with standard ISO 11439:2013 on high pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehicles.)

Rationale for the proposal to harmonize UN R110 with ISO 11439:2013.

Proposal to harmonize the requirements on Compressed Natural Gas (CNG) and/or Liquefied Natural Gas (LNG) vehicles of UN Regulation No. 110 with those of the international standard ISO 11439:2013.

In the absence of complete harmonization with ISO 11439, this proposal recommends that Table 6.4 of UN R110 should be amended by the following for CNG-1 designs:

1. Delete A.17, A.25, and A.7 since they do not match the tests specified in paragraph 7.5 on Cylinder design qualification tests
2. Add A.15 and A.6 since they do match the tests specified in paragraph 7.5 on Cylinder design qualification tests
3. Add A.24 because paragraph 6.9 on Fire protection requires all PRDs on all cylinder types to comply with A.24.

Proposal to harmonize the requirements for CNG/LNG vehicles under UN R110 with those of the international standard ISO 11439:2013.

Proposal to harmonize the requirements for CNG/LNG vehicles under UN R110 with those of the international standard ISO 11439:2013.

In the absence of complete harmonization with ISO 11439, this proposal recommends that Table 6.4 of UN R110 should be amended by the following for CNG-1 designs:

1. Delete A.17, A.25, and A.7 since they do not match the tests specified in paragraph 7.5 on Cylinder design qualification tests
2. Add A.15 and A.6 since they do match the tests specified in paragraph 7.5 on Cylinder design qualification tests
3. Add A.24 because paragraph 6.9 on Fire protection requires all PRDs on all cylinder types to comply with A.24.