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:
- 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
- Add A.15 and A.6 since they do match the tests specified in paragraph 7.5 on Cylinder design qualification tests
- Add A.24 because paragraph 6.9 on Fire protection requires all PRDs on all cylinder types to comply with A.24.