Automotive CNG Fuel Cylinder Approvals Pursuant to regulation 90b of the Traffic Regulations 1976 and pursuant to the powers delegated to me by the Director of Land Transport Safety, I, John Andrew Justice, Senior Engineer, Safer Vehicles Policy, hereby approve the CNG fuel cylinders specified in the Schedule hereto, for inclusion in any CNG automotive fuel system installed and operated in accordance with the requirements of New Zealand Standard NZS 5422, Part 2, 1987 (incorporating Amendment No. 1), subject to the conditions of approval set out in this notice. Schedule Reference No. Manufacturer Countryof Origin Specification Material InspectionAuthority TestPressure(MPa) AF C03B 028 NGV Systems Inc. U.S.A. NZS 5454 Steel C.S.I. 30.0 This approval only applies to all-metal steel cylinders as specified on NGV Systems Inc. Drg No. 2-1048-2 dated 10 March 1998 and in their Design & Qualification Submission for 12 dia steel cylinders dated April 1998. Conditions of Approval These automotive CNG fuel cylinders are approved subject to the following conditions 1. That they comply with all the design, performance, and test requirements of New Zealand Standard NZS 5454:1989 as applicable to all-metal steel cylinders. Note the exemption in condition 5 below. 2. That they be provided with a cylinder shut off valve designed for the cylinder working pressure and compatible with the test pressure of the cylinder. Cylinder shut off valves shall be fitted with a handwheel to facilitate ease of opening and closing of the valve and shall be fitted with a pressure relief device, which remains in contact with the gas contained in the cylinder whether the handwheel is in the open or closed position, comprising a burst disc backed with a fusible alloy plug having a nominal melt temperature of 100c. Should the alloy plug melt the burst disc shall yield at a pressure of not less than 24.7 MPa and not more than 30.0 MPa, otherwise it shall remain inoperative. Cylinder valves shall be provided with an outlet thread of 1/4 NPT (female) and a stem thread compatible with the cylinder neck thread. 3. That they are tested at periods not exceeding 5 years, in accordance with the requirements of Australian Standard AS 2337.1. 4. Cylinder markings are in accordance with section 9 of New Zealand Standard NZS 5454:1989. 5. Section 5 (5.3) ``Cylinder neck and fittings threads'' of New Zealand Standard NZS 5454:1989 shall not apply. The cylinder neck thread shall be 1.125 12UNF 2B straight thread utilising a modified scuba o-ring seal. The thread of any valve or fitting screwed into the neck threads and intended to be part of the final installation shall be compatible with the thread specified above. Dated at Wellington this 7th day of September 1998. J. A. JUSTICE, Senior Engineer, Safer Vehicles Policy. (VP50-70)