UN R110: Information in support of GRSG/2017/29
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Italy research on type CNG4 cylinders in support of the proposal to require that covers be removed in cases where ogive protective covers are fitted to a cylinder before conducting the impact damage (drop) test (document GRSG/2017/29).

Reference Number: GRSG-114-07
Origin: Italy
Date: 23 March 2018
Related Documents:
GRSG-114-14 | UN R110: Specific tests on CNG4 cylinders- Provider 1
GRSG-114-15 | UN R110: Specific tests on CNG4 cylinders - Provider 2
GRSG/2017/29 | Proposal for amendments to Regulation No. 110
Discussion(s):
Working Party on General Safety | Session 114 | 9-13 Apr 2018

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.