Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:9:p39
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 9 (pt 39/71)
Character Range: 319944–324193

life will be limited. Advice should be sought from the supplier as to storage conditions and life.

    1.2.         Ethanol for diesel engines (1)

                                                                            Limits (2)
        Parameter                               Unit                                      Test method (3)
 Minimum                                        Maximum
Alcohol, mass                                   % m/m                92,4               —                  ASTM D 5501
Other alcohol than ethanol contained in total
alcohol, mass                                   % m/m               —                   2                  ADTM D 5501
Density at 15 °C                                kg/m3                795                 815               ASTM D 4052
Ash content                                     % m/m                                    0,001                ISO 6245
Flash point                                     °C                   10                                       ISO 2719
Acidity, calculated as acetic acid              % m/m               —                    0,0025               ISO 1388-2
Neutralisation (strong acid) number             KOH mg/l            —                   1
Colour                                          According to scale  —                    10                ASTM D 1209
Dry residue at 100 °C                           mg/kg                                    15                   ISO 759
Water content                                   % m/m                                    6,5                  ISO 760
Aldehydes calculated as acetic acid             % m/m                                    0,0025               ISO 1388-4
Sulphur content                                 mg/kg               —                    10                ASTM D 5453
Esters, calculated as ethylacetate              % m/m               —                    0,1               ASSTM D 1617

      (1)   Cetane improver, as specified by the engine manufacturer, may be added to the ethanol fuel. The maximum allowed amount is 10 % m/m.
      (2)   The values quoted in the specification are 'true values'. In establishment of their limit values the terms of ISO 4259, Petroleum products — Determination and application of precision data in relation to methods of test, have been applied and in fixing a minimum value, a minimum difference of 2R above zero has         been taken into account; in fixing a maximum and minimum value, the minimum difference is 4R (R  – reproducibility). Notwithstanding this measure, which       is necessary for statistical reasons, the manufacturer of  a fuel should nevertheless aim  at a zero  value where the stipulated  maximum value is 2R and at the   mean value in the case of quotations of maximum and minimum limits. Should it be necessary to clarify the question as to whether a fuel meets the       requirements of the specification, the terms of ISO 4259 should be applied.
      (3)   Equivalent ISO methods will be adopted when issued for all properties listed above.

          2.             NATURAL GAS (NG)

          European market fuels are available in two ranges:

            —    the H range, whose extreme reference fuels are GR and G23;

            —    the L range, whose extreme reference fuels are G23 and G25.

          The characteristics of GR, G23 and G25 reference fuels are summarised below:

          Reference fuel GR

                                               Limits
    Characteristics   Units       Basis                 Test method
  Minimum             Maximum
Composition:
Methane                           87       84           89
Ethane                            13       11           15
Balance (1)           %-mole     —       —             1              ISO 6974
Sulphur 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: