24. The expert from the Netherlands introduced ECE/TRANS/WP.29/GRSG/2014/29 to regulate the direction of discharging the pressure relief devices of CNG containers. He explained that the proposal addressed the safety of not only the vehicle occupants but also the surrounding area. The expert from IANGV introduced GRSG-107-35, which suggests that the discussion should be deferred until after the outcome of the ongoing research conducted in the United States of America on this matter. The experts from France, Germany, Sweden and OICA questioned the impact of this proposal on design of vehicle categories M1 and N1. GRSG agreed to resume discussion on this subject at its May 2015 session on the basis of a revised document.

41. The expert from the Netherlands introduced ECE/TRANS/WP.29/GRSG/2015/6 proposing new provisions on a directional discharge of the pressure relief devices for Compressed Natural Gas (CNG) containers. The expert from Germany presented GRSG-108-08 proposing a number of improvements to the proposed text. Following the discussion, GRSG noted a general support on the final proposal as reflected in GRSG-108-08-Rev.2.

42. GRSG adopted ECE/TRANS/WP.29/GRSG/2015/6 as amended by Annex IV to this report. The secretariat was requested to submit the adopted proposal to WP.29 and AC.1 for consideration at their November 2015 sessions, as draft 02 series of amendments to UN Regulation No. 110.

[Postponed until June 2016 session in order to integrate the contents with additional provisions under development within the GRSG.]

31. The GRSG chair recalled that GRSG had already adopted at its previous session in May 2015 a new 02 series of amendments proposing provisions on a directional discharge of the pressure relief devices of CNG containers (submitted as ECE/TRANS/WP.29/2015/90 to the November 2015 session of WP.29). He added that GRSG had just adopted another amendment removing the provisions on welded cylinders and raising again the stringency of Regulation No. 110. Instead of adopting that amendment as a further new series of amendments, GRSG had agreed to remove ECE/TRANS/WP.29/2015/90 from the WP.29 agenda in November 2015 and to submit a new draft 02 series of amendments to UN Regulation No. 110, incorporating both proposals (directional discharge and removal of welded cylinders) for consideration at the March 2016 session of WP.29.

61. The consideration of ECE/TRANS/WP.29/2015/90 tabled under agenda item 4.7.9 was deferred to the March 2016 session of WP.29 (see para. 31 above).