wide, where "t" equals specimen thick ness. Tensile $5.7.3 Tensile strength. strength shall not exceed 725 MPa (105,000 psi) for "Carbon Manganese" and 966 MPa (140,000 psi) for "ChromeMolybdenum" and "Carbon-Boron." S6 General requirements. S6.1 Each passenger car, multipurpose passenger vehicle, truck, and bus that uses CNG as a motor fuel shall be equipped with a CNG fuel container that meets the requirements of S7 through $7.4. S6.2 Each CNG fuel container manufactured on or after March 27, 1995 shall meet the requirements of S7 through S7.4. S7 Test requirements. Each CNG fuel container shall meet the applicable requirements of S7 through S7.4. S7.1 Pressure cycling test at ambient temperature. Each CNG fuel container shall not leak when tested in accordance with S8.1. S7.2 Hydrostatic burst test. S7.2.1 Each Type 1 CNG fuel container shall not leak when subjected to burst pressure and tested in accordance with S8.2. Burst pressure shall be not less than 2.25 times the service pressure for non-welded containers when analyzed in accordance with the stress ratio requirements of S5.4.1, and shall not be less than 3.5 times the service pressure for welded containers. S7.2.2 Each Type 2, Type 3, or Type 4 CNG fuel container shall not leak when subjected to burst pressure and tested in accordance with S8.2. Burst pressure shall be no less than the value necessary to meet the stress ratio requirements of Table 3, when analyzed in accordance with the requirements of $5.5.1. entire contents when tested in accordance with S8.3. S7.4 Labeling. Each CNG fuel container shall be permanently labeled with the information specified in paragraphs (a) through (h) of this section. Any label affixed to the container in compliance with this section shall remain in place and be legible for the manufacturer's recommended service life of the container. The information shall be in English and in letters and numbers that are at least 6.35 mm (1⁄4 inch) high. (a) The statement: "If there is a question about the proper use, installation, or maintenance of this container, contact inserting the CNG fuel container manufacturer's name, address, and telephone number. (b) The statement: "Manufactured in inserting the month and year of manufacture of the CNG fuel container. (c) The statement: "Service pressure kPa, psig)." (d) The symbol DOT, constituting a certification by the CNG container manufacturer that the container complies with all requirements of this standard. (e) The container designation (e.g., Type 1, 2, 3, 4). (f) The statement: "CNG Only." (g) The statement: "This container should be visually inspected after a motor vehicle accident or fire and at least every 36 months or 36,000 miles, whichever comes first, for damage and deterioration. (h) The statement: "Do Not Use After inserting the month and year that mark the end of the manufacturer's recommended service life for the container. S8 Test conditions: fuel container integrity. S8.1 Pressure cycling test. The requirements of S7.1 shall be met under the conditions of S8.1.1 through S8.1.4. S8.1.1 Hydrostatically pressurize the CNG container to the service pressure, then to not more than 10 percent of the service pressure, for 13,000 cycles. more than 10 percent of the service pressure, for 5,000 cycles. S8.1.3 The cycling rate for S8.1.1 and S8.1.2 shall be any value up to and including 10 cycles per minute. S8.1.4 The cycling is conducted at ambient temperature. S8.2 Hydrostatic burst test. The requirements of S7.2 shall be met under the conditions of S8.2.1 through S8.2.2. S8.2.1 Hydrostatically pressurize the CNG fuel container, as follows: The pressure is increased up to the minimum prescribed burst pressure determined in S7.2.1 or S7.2.2, and held constant at the minimum burst pressure for 10 seconds. rate S8.2.2 The pressurization throughout the test shall be any value up to and including 1,379 kPa (200 psi) per second. S8.3 Bonfire test. The requirements of $7.3 shall be met under the conditions of S8.3.1 through S8.3.10. S8.3.1 The CNG fuel container is filled with compressed natural gas and tested at (1) 100 percent of service pressure and (2) 25 percent of service pressure. Manufacturers may conduct these tests using the same container or with separate containers. S8.3.2 The CNG fuel container is positioned so that its longitudinal axis is horizontal. Attach three thermocouples to measure temperature on the container's bottom side along a line parallel to the container longitudinal centerline. Attach one at the midpoint of the container, and one at each end at the point where the dome end intersects the container sidewall. Subject the entire length to flame impingement, except that the flame shall not be allowed to impinge directly on any pressure relief device. Shield the pressure relief device with a metal plate. S8.3.3 If the test container is 165 cm (65 inches) in length or less, place it in the upright position. Attach three thermocouples to measure temperature on the container's bottom side along a line which intersects the container longitudinal centerline. Attach one at the midpoint of the bottom of the container, and one each at the point where the dome end intersects the container sidewall. Subject the container to total fire engulfment in the vertical. The flame shall not be allowed to impinge directly on any pressure relief device. For containers equipped with a pressure relief device on one end, the container is positioned with the relief device on top. For containers equipped with pressure relief devices on both ends, the bottom pressure relief device shall be shielded with a metal plate. S8.3.4 The lowest part of the container is suspended at a distance above the fire such that the container bottom surface temperatures specified in S8.3.6 are achieved. S8.3.5 The CNG fuel container is tested with the valve and pressure relief device or devices in place. S8.3.6 The fire is generated by any fuel that maintains a flame temperature between 850 and 900 C for the duration of the test, as verified by each of the three thermocouples in S8.3.2 or S8.3.3. S8.3.7 The fuel specified in S8.3.6 is such that there is sufficient fuel to burn for at least 20 minutes. To ensure that the sides of the fuel container are exposed to the flame, the surface area of the fire on a horizontal plane is such that it exceeds the fuel container projection on a horizontal plane by at least 20 cm (8 inches) but not more than 50 cm (20 inches). S8.3.8 Time-pressure readings are recorded at 30 second intervals, beginning when the fire is lighted and continuing until the container is completely tested. S8.3.9 The CNG fuel container is exposed to the bonfire for 20 minutes or until its contents are completely vented. S8.3.10 The average wind velocity at the container is any velocity up to and including 2.24 meters/second (5 mph). [59 FR 49021, Sept. 26, 1994; 59 FR 66776, Dec. 28, 1994; 60 FR 37843, July 24, 1995; 60 FR 57948, Nov. 24, 1995; 61 FR 19204, May 1, 1996; 61 FR 47089, Sept. 6, 1996] § 571.500 Standard No. 500; Low-speed vehicles. S1. Scope. This standard specifies requirements for low-speed vehicles. S2. Purpose. The purpose of this standard is to ensure that low-speed vehicles operated on the public streets, roads, and highways are equipped with (8) A windshield of AS-1 or AS-5 composition, that conforms to the American National Standard Institute's "Safety Code for Safety Glazing Materials for Glazing Motor Vehicles Operating on Land Highways," Z-26.1-1977, January 28, 1977, as supplemented by Z26.1a, July 3, 1980 (incorporated by reference; see 49 CFR 571.5), (9) A VIN that conforms to the requirements of part 565 Vehicle Identification Number of this chapter, and (10) A Type 1 or Type 2 seat belt assembly conforming to Sec. 571.209 of this part, Federal Motor Vehicle Safety Standard No. 209, Seat belt assemblies, installed at each designated seating position. S6. General test conditions. Each vehicle must meet the performance limit specified in S5(a) under the following test conditions. S6.1. Ambient conditions. S6.1.1. Ambient temperature. The ambient temperature is any temperature between 0 °C (32 °F) and 40 °C (104 °F). S6.1.2. Wind speed. The wind speed is not greater than 5 m/s (11.2 mph). S6.2. Road test surface. S6.2.1. Pavement friction. Unless otherwise specified, the road test surface produces a peak friction coefficient (PFC) of 0.9 when measured using a standard reference test tire that meets the specifications of American Society for Testing and Materials (ASTM) E1136, "Standard Specification for A Radial Standard Reference Test Tire,' in accordance with ASTM Method E 1337-90, "Standard Test Method for Determining Longitudinal Peak Braking Coefficient of Paved Surfaces Using a Standard Reference Test Tire," at a speed of 64.4 km/h (40.0 mph), without water delivery (incorporated by reference; see 49 CFR 571.5). S6.2.2. Gradient. The test surface has not more than a 1 percent gradient in the direction of testing and not more than a 2 percent gradient perpendicular to the direction of testing. S6.2.3. Lane width. The lane width is not less than 3.5 m (11.5 ft). S6.3. Vehicle conditions. S6.3.1. The test weight for maximum speed is unloaded vehicle weight plus a mass of 78 kg (170 pounds), including driver and instrumentation. S6.3.2. No adjustment, repair or replacement of any component is allowed after the start of the first performance test. S6.3.3. Tire inflation pressure. Cold inflation pressure is not more than the maximum permissible pressure molded on the tire sidewall. rec S6.3.4. Break-in. The vehicle completes the manufacturer's ommended break-in agenda as a minimum condition prior to beginning the performance tests. S6.3.5. Vehicle openings. All vehicle openings (doors, windows, hood, trunk, convertible top, cargo doors, etc.) are closed except as required for instrumentation purposes. S6.3.6. Battery powered vehicles. Prior to beginning the performance tests, propulsion batteries are at the state of charge recommended by the manufacturer or, if the manufacturer has made no recommendation, at a state of charge of not less than 95 percent. No further charging of any propulsion battery is permissible. S7. Test procedure. Each vehicle must meet the performance limit specified in S5(a) under the following test procedure. The maximum speed performance is determined by measuring the maximum attainable vehicle speed at any equipment with motor vehicle safety standards. [60 FR 43058, Aug. 18, 1995] § 572.2 Purpose. The design and performance criteria specified in this part are intended to describe measuring tools with sufficient precision to give repetitive and correlative results under similar test conditions and to reflect adequately the protective performance of a vehicle or item of motor vehicle equipment with respect to human occupants. [38 FR 20451, Aug. 1, 1973, as amended at 42 FR 7151, Feb. 7, 1977] § 572.3 Application. This part does not in itself impose duties or liabilities on any person. It is a description of tools that measure the performance of occupant protection systems required by the safety standards that incorporate it. It is designed to be referenced by, and become a part of, the test procedures specified in motor vehicle safety standards such as Standard No. 208, Occupant Crash Protection. [38 FR 20451, Aug. 1, 1973, as amended at 42 FR 7152, Feb. 7, 1977] § 572.4 Terminology. (a) The term dummy, when used in this subpart A, refers to any test device described by this part. The term dummy, when used in any other subpart of this part, refers to the particular dummy described in that part. (b) Terms describing parts of the dummy, such as head, are the same as names for corresponding parts of the human body. (c) The term unimodal, when used in subparts C and I, refers to an acceleration-time curve which has only one prominent peak. [38 FR 20451, Aug. 1, 1973, as amended at 42 FR 7152, Feb. 7, 1977; 44 FR 76530, Dec. 27, 1979; 56 FR 57836, Nov. 14, 1991] Subpart B-50th Percentile Male § 572.5 General description. (a) The dummy consists of the component assemblies specified in Figure 1, which are described in their entirety by means of approximately 250 drawings and specifications that are grouped by component assemblies under the following nine headings: SA 150 M070-Right arm assembly (b) The drawings and specifications referred to in this regulation that are not set forth in full are hereby incorporated in this part by reference. These materials are thereby made part of this regulation. The Director of the Federal Register has approved the materials incorporated by reference. For materials subject to change, only the specific version approved by the Director of the Federal Register and specified in the regulation are incorporated. A notice of any change will be published in the FEDERAL REGISTER. As a convenience to the reader, the materials incorporated by reference are listed in the Finding Aid Table found at the end of this volume of the Code of Federal Regulations. (c) The materials incorporated by reference are available for examination in Docket 73-08, Docket Section, National Highway Traffic Safety Administration, Room 5109, 400 Seventh Street SW., Washington, DC, 20590. Copies may be obtained from RowleyScher Reprographics, Inc., 1216 K Street NW., Washington, DC 20005 ((202) 628-6667). The drawings and specifications are also on file in the reference library of the Office of the Federal Register, National Archives and Records Administration, Washington, DC. (d) Adjacent segments are joined in a manner such that throughout the range of motion and also under crash impact conditions there is no contact between metallic elements except for contacts that exist under static conditions. (e) The structural properties of the dummy are such that the dummy conforms to this part in every respect both before and after being used in vehicle |