Proposal to allow for the approval of systems using non-seamless double and single wall tubes subject to testing for high pressure and high resistance to pressure pulses. The proposal would also add general test requirements for LPG fuel lines and couplings based on ISO Standard 15500 for compressed natural gas equipment.
32. Referring to ECE/TRANS/WP.29/GRSG/2017/27, the expert from AEGPL recalled the purpose of his proposal to clarify the provisions in UN Regulation No. 67 on the use of non-seamless gas tubes in LPG vehicles. GRSG adopted the document, as amended below, and requested the secretariat to submit it to WP.29 and AC.1 as part (see para. 31 above) of draft Supplement 15 to the 01 series of amendments to UN Regulation No. 67 for consideration at their March 2018 sessions.
Paragraph 2.2., subparagraph (s), amend to read:
“(s) Non-seamless and seamless gas tubes and their couplings;”
New paragraph 17.7.1.2., amend to read:
| “17.7.1.2. | The outer diameter of Class 1 gas tubes made of copper shall not exceed 12 mm with a wall thickness of at least 0.8 mm, gas tubes of Class 1 from steel and stainless steel shall not exceed 25 mm with, for gas services, an appropriate wall thickness.” |
| “17.7.4. | Gas pipes made of a non-metallic material shall comply with the requirements of this Regulation, paragraph 6.7.” |
Annex 15, paragraph 5., replace “Only longitudinal welding” by “Only straight longitudinal welding”.
21. The expert from the Netherlands presented ECE/TRANS/WP.29/GRSG/2017/3 amending the provisions of UN Regulation No. 67 to use non-seamless gas tubes in LPG vehicles. The expert from AEGPL presented GRSG-112-19 inserting some improvements to the proposed provisions. GRSG noted general support and a number of comments. The expert from Germany raised a study reservation. Following the discussion, GRSG agreed to resume consideration of this subject at its next session in October 2017. In this respect, GRSG invited the experts from the Netherlands and AEGPL to prepare a combined document (see para. 20 above), taking into account the comments received and to submit it, in due time, to the secretariat for consideration and final review at the next GRSG session in October 2017.
29. The expert from ISO presented GRSG-109-14 on the progress of work within the ISO working group on refueling connector and fuel components for vehicles propelled by Liquefied Natural Gas (LNG). He underlined the request from original equipment manufacturers to update UN Regulation No. 67 with respect to LPG fuel lines and welding requirements.
32. Referring to his presentation (GRSG-109-14) given under agenda item 8 (para. 28 above), the expert from ISO volunteered to submit for the next GRSG session an official document proposing to amend the provisions of Annex 4B of UN Regulation No. 110, including the correction of some errors in Annexes 4A and 4H.
| GRSG-109-14 | |
| GRSG/2017/3 | |
| GRSG/2017/27 |