Presentation on efforts to prevent natural gas powered vehicles from being certified as “dangerous goods vehicles” (ADR) through education of the UN ADR working party (WP.15) on liquefied and natural gas fuel systems and development of regulatory language to address WP.15 concerns.

Proposal to regulate the discharge direction of pressure relief devices (PRD) on CNG containers in response to a fire accident in the Netherlands in which the PRD produced a long horizontal jet flame for several minutes posing a risk to other road users and surrounding buildings.

Note to open a discussion concerning the gas-cylinder periodic inspection requirements of Annex 3 of UN R110.

Supplement 1 to the 01 series included requirements for the positioning of LNG tanks. While the Netherlands believes that mounting the LNG fuel tank 200mm above the road surface is broadly adequate; this proposal aims to ensure that the fuel tank cannot, under any normal driving or stationary working situations, come into contact with the ground. The new wording provides more definitive conditions, including the possibility of a vehicle having one or more flat tires as well as for those vehicles that have ‘kneeling’ capability or variable suspension, both of which lower the frame of the vehicle closer to the ground.

Proposal to require an exterior protection on cylindrical gas tanks. Under the current regulation, such exterior protection may be fitted at the discretion of the manufacturer. The intention is to increase protection against corrosion of cylinders in response to a corroded cylinder explosion in Germany.

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

Text prepared by the Netherlands and the International Association for Natural Gas Vehicles (IANGV/NGV Global) to clarify the provisions of Chapter 18 following the introduction of automatic valves (see report GRSG/84, para. 38).

Proposal to introduce a new class of CNG components (Class 6) operating at a higher pressure.

Proposal to clarify the provisions for the periodic inspection of pressure relief valves.

Proposal to regulate the direction of discharging the pressure relief devices of CNG containers.

Proposal to establish an expert working group to review and update the provisions of UN Regulation No. 110 in order to produce a new consolidated, harmonized version of the regulation.

Pursuant to research conducted in Japan, this document recommends amending UN R110 with regard to:

1. Welded metal cylinders
2. Steel cylinders (CNG-1 cylinder) and Steel liner cylinders (CNG-2 cylinder)
3. Accessories fitted to the cylinder, and
4. Indication of cylinder and accessories fitted to the cylinder.

The document also raises the possibility of further considerations concerning LNG cylinders.

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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 add a definition for “CNG Accumulator” and to revise a related decision tree flow chart.

Corrections to the proposal to clarify the provisions of Chapter 18 following the introduction of automatic valves (see report GRSG/84, para. 38).

Request to postpone consideration of the Dutch proposal concerning the discharge of natural gases from a pressure relief device (PRD) in anticipation of conclusions and best practices on the location and venting of PRD from a research program underway in the US.

Proposal as approved by the GRSG Doc to introduce a new class of CNG components (Class 6) operating at a higher pressure.