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Council Directive of 20 March 1970 on the approximation of the laws of the Member States on measures to be taken against air pollution by emissions from motor vehicles (70/220/EEC) (repealed)
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[F1ANNEX IXa U.K. SPECIFICATIONS OF GASEOUS REFERENCE FUELS
Textual Amendments
A. Technical data of the LPG reference fuels U.K.
1. TECHNICAL DATA OF THE LPG REFERENCE FUELS USED FOR TESTING VEHICLES TO THE EMISSION LIMITS GIVEN IN ROW A OF THE TABLE IN SECTION 5.3.1.4 OF ANNEX I — TYPE I TEST U.K.
| a 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 | Fuel A | Fuel B | Test method |
|---|---|---|---|---|
| Composition : | ISO 7941 | |||
| C 3 -content | % vol. | 30 ± 2 | 85 ± 2 | |
| C 4 -content | % vol. | balance | balance | |
| < C 3 , > C 4 | % vol. | maximum 2 | maximum 2 | |
| Olefins | % vol. | maximum 12 | maximum 15 | |
| Evaporation residue | mg/kg | maximum 50 | maximum 50 | ISO 13757 |
| Water at 0 °C | free | free | visual inspection | |
| Total sulphur content | mg/kg | maximum 50 | maximum 50 | EN 24260 |
| Hydrogen sulphide | none | none | ISO 8819 | |
| Copper strip corrosion | rating | class 1 | class 1 | ISO 6251 a |
| Odour | characteristic | characteristic | ||
| Motor octane number | minimum 89 | minimum 89 | EN 589 Annex B | |
2. TECHNICAL DATA OF THE LPG REFERENCE FUELS USED FOR TESTING VEHICLES TO THE EMISSION LIMITS GIVEN IN ROW B OF THE TABLE IN SECTION 5.3.1.4 OF ANNEX I — TYPE I TEST U.K.
| a 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 | Fuel A | Fuel B | Test method |
|---|---|---|---|---|
| Composition : | ISO 7941 | |||
| C 3 -content | % vol | 30 ± 2 | 85 ± 2 | |
| C 4 -content | % vol | balance | balance | |
| < C 3 , > C 4 | % vol | maximum 2 | maximum 2 | |
| Olefins | % vol | maximum 12 | maximum 15 | |
| Evaporation residue | mg/kg | maximum 50 | maximum 50 | ISO 13757 |
| Water at 0 °C | free | free | Visual inspection | |
| Total sulphur content | mg/kg | maximum 10 | maximum 10 | EN 24260 |
| Hydrogen sulphide | none | none | ISO 8819 | |
| Copper strip corrosion | Rating | class 1 | class 1 | ISO 6251 a |
| Odour | characteristic | characteristic | ||
| Motor octane number | minimum 89 | minimum 89 | EN 589 Annex B | |
B. Technical data of the ng reference fuels U.K.
| a Inerts (different from N 2 ) + C 2 +C 2+ . | |||||
| b Value to be determined at 293,2 K (20 °C) and 101,3 kPa. | |||||
| c Value to be determined at 273,2 K (0 °C) and 101,3 kPa.] | |||||
| Characteristics | Units | Basis | Limits | Test method | |
|---|---|---|---|---|---|
| minimum | maximum | ||||
| Reference fuel G 20 | |||||
| Composition: | |||||
| Methane | % mole | 100 | 99 | 100 | ISO 6974 |
| Balance a | % mole | — | — | 1 | ISO 6974 |
| N 2 | % mole | ISO 6974 | |||
| Sulphur content | mg/m 3 b | — | — | 10 | ISO 6326-5 |
| Wobbe Index (net) | MJ/m 3 c | 48,2 | 47,2 | 49,2 | |
| Reference fuel G 25 | |||||
| Composition: | |||||
| Methane | % mole | 86 | 84 | 88 | ISO 6974 |
| Balance a | % mole | — | — | 1 | ISO 6974 |
| N 2 | % mole | 14 | 12 | 16 | ISO 6974 |
| Sulphur content | mg/m 3 b | — | — | 10 | ISO 6326-5 |
| Wobbe Index (net) | MJ/m 3 c | 39,4 | 38,2 | 40,6 | |
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