Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:9:p40
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 9 (pt 40/71)
Character Range: 323788–328040

content       mg/m3 (2)  —       —              10            ISO 6326-5

            (1)    Inerts +C2+
            (2)     Value to be determined at standard conditions (293, 2 K (20 °C) and 101, 3 kPa)

          Reference fuel G23

                                               Limits
    Characteristics   Units       Basis                 Test method
  Minimum             Maximum
Composition:
Methane                            92,5    91,5         93,5
Balance (1)           %-mole        —    —             1              ISO 6974
N2                                  7,5    6,5          8,5
Sulphur content       mg/m3 (2)     —    —              10            ISO 6326-5

            (1)    Inerts (different from N2) +C2+ +C2+.
            (2)     Value to be determined at standard conditions (293,2 K (20 °C) and 101,3 kPa).

          Reference fuel G25

                                               Limits
    Characteristics   Units       Basis                 Test method
  Minimum             Maximum
Composition:
Methane                           86       84           88
Balance (1)           %-mole     —       —             1              ISO 6974
N2                                14       12           16
Sulphur content       mg/m3 (2)  —       —              10            ISO 6326-5

            (1)    Inerts (different from N2) +C2+ +C2+.
            (2)    Value to be determined at standard conditions (293,2 K (20 °C) and 101,3 kPa).

          3.             LIQUEFIED PETROLEUM GAS (LPG)

                                            Limits    fuel A          Limits           fuel B
   Parameter             Unit                                                                    Test method
 Minimum                 Maximum          Minimum      Maximum
Motor octane number                       92,5 (1)                   92,5                         EN 589
                                                                                                  Annex B
Composition
C3 content               % vol             48           52           83                  87
C4 content               % vol             48           52           13                  17     ISO 7941
Olefins                  % vol                          12                               14
Evaporation residue      mg/kg                          50                               50     NFM 41015
Total sulphur content    ppm weight (1)                 50                               50     EN 24260
Hydrogen sulphide       —                    None         None      ISO 8819
Copper strip corrosion   rating              class 1      class 1   ISO 6251 (2)
Water at 0 °C                                free         free      Visual inspection

            (1)    Value to be determined at standard conditions 293,2 K (20 °C) and 101,3 kPa.
            (2)    This method may not accurately determine the presence of corrosive materials if the sample contains corrosion inhibitors or other chemicals which diminish the corrosivity of the sample to the copper strip. Therefore, the addition of such compounds for the sole purpose of biasing the test method is prohibited.

ANNEX V

        ANALYTICAL AND SAMPLING SYSTEMS

               1. DETERMINATION OF THE GASEOUS EMISSIONS

1.1.                            Introduction

              Section 1.2 and Figures 7 and 8 contain detailed descriptions of the recommended sampling and analysing systems. Since various configurations can produce equivalent results, exact conformance with Figures 7 and 8 is not required. Additional components such as instruments, valves, solenoids, pumps, and switches may be used to provide additional information and co-ordinate the functions of the component systems. Other components which are not needed to maintain the accuracy on some systems, may be excluded if their exclusion is based upon good engineering judgement.

        Figure 7

        Flow diagram of raw exhaust gas analysis system for CO, CO2, NOx, HC ESC only

1.2.                            Description of the analytical system

              An analytical system for the determination of the gaseous emissions in the raw (Figure 7, ESC only) or diluted (Figure 8, ETC and