Directive 2005/55/EC of the European Parliament and of the Council (repealed)Show full title

ANNEX IV U.K. TECHNICAL CHARACTERISTICS OF REFERENCE FUEL PRESCRIBED FOR APPROVAL TESTS AND TO VERIFY CONFORMITY OF PRODUCTION

1.1.

DIESEL FUEL^a

a 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) in MJ/kg = (46,423 - 8,792d2 + 3,170d)(1 - (x + y + s)) + 9,420s - 2,499x where, d = the density at 15 °C x = the proportion by mass of water (% divided by 100) y = the proportion by mass of ash (% divided by 100) s = the proportion by mass of sulphur (% divided by 100).
b The values quoted in the specification are ‘true values’. In establishment of their limit values the terms of ISO 4259, Petroleums 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.
c The range for cetane number is not in accordance with the requirement of a minimum range of 4R. However, in the case of dispute between fuel supplier and fuel user, the terms in ISO 4259 can be used to resolve such disputes provided replicate measurements, of sufficient number to achieve the necessary precision, are made in preference to single determinations.
d The month of publication will be completed in due course.
e The actual sulphur content of the fuel used for the test shall be reported. In addition, the sulphur content of the reference fuel used to approve a vehicle or engine against the limit values set out in row B of the Table in Section 6.2.1. of Annex I to this Directive shall have a maximum sulphur content of 50 ppm. The Commission will as soon as possible bring forward a modification to this Annex reflecting the market average for fuel sulphur content in respect of the fuel defined in Annex IV to Directive 98/70/EC.
f Even though oxidation stability is controlled, it is likely that shelf life will be limited. Advice should be sought from the supplier as to storage conditions and life.
g New and better method for polycyclic aromatics under development
Parameter	Unit	Limitsb		Test method	Publication
		Minimum	Maximum
Cetane numberc		52	54	EN-ISO 5165	1998d
Density at 15 °C	kg/m3	833	837	EN-ISO 3675	1995
Distillation:
— 50 % point	°C	245	—	EN-ISO 3405	1998
— 95 % point	°C	345	350	EN-ISO 3405	1998
— final boiling point	°C	—	370	EN-ISO 3405	1998
Flash point	°C	55	—	EN 27719	1993
CFPP	°C	—	- 5	EN 116	1981
Viscosity at 40 °C	mm2/s	2,5	3,5	EN-ISO 3104	1996
Polycyclic aromatic hydrocarbons	% m/m	3,0	6,0	IP 391g	1995
Sulphur contente	mg/kg	—	300	pr. EN-ISO/DIS 14596	1998d
Copper corrosion		—	1	EN-ISO 2160	1995
Conradson carbon residue (10 % DR)	% m/m	—	0,2	EN-ISO 10370
Ash content	% m/m	—	0,01	EN-ISO 6245	1995
Water content	% m/m	—	0,05	EN-ISO 12937	1995
Neutralisation (strong acid) number	mg KOH/g	—	0,02	ASTM D 974-95	1998d
Oxidation stabilityf	mg/ml	—	0,025	EN-ISO 12205	1996
	% m/m	—	—	EN 12916	[2000]d

1.2.

Ethanol for diesel engines^a

a Cetane improver, as specified by the engine manufacturer, may be added to the ethanol fuel. The maximum allowed amount is 10 % m/m.
b 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.
c Equivalent ISO methods will be adopted when issued for all properties listed above.
Parameter	Unit	Limitsb		Test methodc
		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

2. NATURAL GAS (NG) U.K.

European market fuels are available in two ranges:

• the H range, whose extreme reference fuels are G_R and G₂₃;

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

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

Reference fuel G_R

a Inerts +C2+
b Value to be determined at standard conditions (293, 2 K (20 °C) and 101, 3 kPa).
Characteristics	Units	Basis	Limits		Test method
			Minimum	Maximum
Composition:
Methane		87	84	89
Ethane		13	11	15
Balancea	%-mole	—	—	1	ISO 6974
Sulphur content	mg/m3 b	—	—	10	ISO 6326-5

Reference fuel G₂₃

a Inerts (different from N2) +C2+ +C2+.
b Value to be determined at standard conditions (293,2 K (20 °C) and 101,3 kPa).
Characteristics	Units	Basis	Limits		Test method
			Minimum	Maximum
Composition:
Methane		92,5	91,5	93,5
Balancea	%-mole	—	—	1	ISO 6974
N2		7,5	6,5	8,5
Sulphur content	mg/m3 b	—	—	10	ISO 6326-5

Reference fuel G₂₅

a Inerts (different from N2) +C2+ +C2+.
b Value to be determined at standard conditions (293,2 K (20 °C) and 101,3 kPa).
Characteristics	Units	Basis	Limits		Test method
			Minimum	Maximum
Composition:
Methane		86	84	88
Balancea	%-mole	—	—	1	ISO 6974
N2		14	12	16
Sulphur content	mg/m3 b	—	—	10	ISO 6326-5

3. LIQUEFIED PETROLEUM GAS (LPG) U.K.

a Value to be determined at standard conditions 293,2 K (20 °C) and 101,3 kPa.
b 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.
Parameter	Unit	Limits fuel A		Limits fuel B		Test method
		Minimum	Maximum	Minimum	Maximum
Motor octane number		92,5a		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 weighta		50		50	EN 24260
Hydrogen sulphide	—	None		None		ISO 8819
Copper strip corrosion	rating	class 1		class 1		ISO 6251b
Water at 0 °C		free		free		Visual inspection