Document ID: chunk:federal_register_of_legislation:F2021C01210:reg:90:p6
Version: federal_register_of_legislation:F2021C01210
Segment Type: reg
Provision Reference: reg 90 (pt 6/7)
Character Range: 81378–84560

value X L  is given by the smaller of the following two expressions:

    or

Annex 6
SPECIFICATIONS OF REFERENCE FUEL PRESCRIBED FOR APPROVAL
TESTS AND TO VERIFY CONFORMITY OF PRODUCTION
Property Limits and Units ASTM Method 1/

                                         Density at 15C min. 0.835 kg/l D 1298
max. 0.845 kg/1
                                         Cetane index min. 51 D 976
max. 57
                                         Distillation (2)  D 86
                           50% Vol. point min. 245C
                           90% Vol. point min. 320C
max. 340
                           Final boiling point max. 370C
                                         Viscosity at 40C min. 2.5 mm 2 /s D 445
max. 3.5 mm 2 /s
                                         Sulphur content min. 0.20% mass D 1266, D 2622,
                                         max. 0.50 or D 2785
                                         Flash point min. 55C D 93
                                         Cold filter plugging point max.-5 C CEN Draft Pr EN116
or IP309
                                         Conradsor carbon residue max. 0.20% mass D 189
on 10% dist. residue
                                         Ash content max. 0.01% mass D 482
                                         Water content max. 0.05% mass D 95 or D 1744
                                         Copper corrosion 100C max. 1 D 130
                           Neutralization (Strong acid) number max. 0.20 mg KOH/g D 974

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l/ Initials of the American Society for Testing and Materials,
 1916 Race St., Philadelphia, Pennsylvania 19103, United States of America.
Note l:  Equivalent ISO methods will be referred to when issued for all properties listed above.

          Note 2:  The figures quoted show the total evaporated quantities (per cent recovered + per cent loss).

          Note 3:  This fuel may be based on straight run and cracked distillates; desulphurization is allowed. It must not contain any metallic additives.

          Note 4:  The values quoted in the specification are "true values". In establishment of their limit values the terms of ASTM D 3244 "Defining a Basis for Petroleum Product Quality Disputes" have been applied and in fixing a maximum 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 ASTM D 3244 should be applied.

          Note 5:  If it is required to calculate the Thermal Efficiency of an engine or vehicle, the calorific value of the fuel can be calculated from: Specific energy (calorific value) (net)
MJ/kg = (46.423 - 8.792d 2 + 3.170d)
(1 - (x + y + s)) + 9.420s - 2.499x where:
d is the density at 15C
x is the proportion by mass of water