Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:13:p17
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 13 (pt 17/27)
Character Range: 676788–684512

is 2R and at the mean value in the case of quotations of maximum and minimum limits. Should it be necessary to clarify whether a fuel meets the requirements of the specifications, the terms of ISO 4259 shall be applied.
   2 The actual sulphur content of the fuel used for the emission tests shall be reported.
   3 Ethanol to meet specification of EN 15376 is the only oxygenate that shall be intentionally added to this reference fuel.
   4 The unleaded petrol content can be determined as 100 minus the sum of the percentage content of water, alcohols, MTBE and ETBE.
   5 There shall be no intentional addition of compounds containing phosphorus, iron, manganese, or lead to this reference fuel.

      Type: LPG
Parameter                                                                                                                                                                                                                                                                                                                     Unit    Fuel A          Fuel B          Test method
Composition:                                                                                                                                                                                                                                                                                                                                                          EN 27941
C3-content                                                                                                                                                                                                                                                                                                                    % v/v   30 ± 2          85 ± 2
C4-content                                                                                                                                                                                                                                                                                                                    % v/v   Balance1        Balance1
< C3 , > C4                                                                                                                                                                                                                                                                                                                   % v/v   Maximum 2       Maximum 2
Olefins                                                                                                                                                                                                                                                                                                                       % v/v   Maximum 12      Maximum 15
Evaporation residue                                                                                                                                                                                                                                                                                                           mg/kg   Maximum 50      Maximum 50      EN 15470
Water at 0 °C                                                                                                                                                                                                                                                                                                                         Free            Free            EN 15469
Total sulphur content including odorant                                                                                                                                                                                                                                                                                       mg/kg   Maximum 10      Maximum 10      EN 24260, ASTM D 3246, ASTM 6667
Hydrogen sulphide                                                                                                                                                                                                                                                                                                                     None            None            EN ISO 8819
Copper strip corrosion                                                                                                                                                                                                                                                                                                        Rating  Class 1         Class 1         ISO 62512
(1h at 40 °C)
Odour                                                                                                                                                                                                                                                                                                                                 Characteristic  Characteristic
Motor octane number3                                                                                                                                                                                                                                                                                                                  Minimum 89.0    Minimum 89.0    EN 589 Annex B
Notes:
    1 Balance shall be read as follows: balance = 100 - C3 - <C3 - >C4.
    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.
    3 At the request of the engine manufacturer, a higher MON could be used to perform the type approval tests.

     Type: Natural Gas/ Biomethane
Characteristics                                                                 Units       Basis  Limits  Test method
minimum                                                                         maximum
Reference fuel GR
Composition:
Methane                                                                                     87     84      89
Ethane                                                                                      13     11      15
Balance1                                                                        % mole      —      —       1            ISO 6974
Sulphur content                                                                 mg/m3 2     —              10           ISO 6326-5

Notes:
1 Inerts + C2+
2 Value to be determined at standard conditions 293.2 K (20 °C) and 101.3 kPa.
Reference fuel G23
Composition:
Methane                                                                                     92.5   91.5    93.5
Balance1                                                                        % mole      —      —       1            ISO 6974
N2                                                                              % mole      7.5    6.5     8.5
Sulphur content                                                                 mg/m3 2     —      —       10           ISO 6326-5

Notes:
1 Inerts (different from N2) + C2+ C2+
2 Value to be determined at 293.2 K (20 °C) and 101.3 kPa.
Reference fuel G25
Composition:
Methane                                                                         % mole      86     84      88
Balance1                                                                        % mole      —      —       1            ISO 6974