This European Standard specifies a method for the determination of the vapour pressure, exerted in vacuo, by volatile, low viscosity petroleum products, components, ethanol blends up to 85 % (V\/V), and feedstocks using a variable volume chamber. A dry vapour pressure equivalent (DVPE) is calculated from the vapour pressure. The conditions used in the test described in this standard are a vapour-to-liquid ratio of 4:1 and a test temperature of 37,8 \u00b0C. The equipment is not wetted with water during the test, and the method described is therefore suitable for testing samples with or without oxygenates; no account is taken of dissolved water in the sample. This procedure calculates the partial pressure of the air dissolved in the test portion during the triple expansion process. It is suitable for samples with a DVPE between 13,7 kPa and 98,3 kPa; vapour pressures outside this range can be measured but the precision has not been determined. This document is applicable to fuels containing oxygenated compounds up to the limits stated in the relevant Council Directive 85\/536\/EEC [6], and for ethanol-fuel blends up to 85 % (V\/V) ethanol. NOTE For the purposes of this European Standard, the terms “% (m\/m)” and “% (V\/V)” are used to represent the mass and volume fractions respectively. WARNING – The use of this Standard can involve hazardous materials, operations and equipment. This Standard does not purport to address all of the safety problems associated with its use. It is the responsibility of users of this standard to take appropriate measures to ensure the safety and health of personnel prior to application of the standard, and fulfil statutory and regulatory requirements for this purpose.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | National foreword <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | European foreword <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | Introduction <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 4 Principle 5 Reagents and materials <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 6 Apparatus 6.1 Instrument: <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 7 Sampling 8 Sample preparation <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 9 Preparation of apparatus 10 Calibration of apparatus 10.1 Pressure transducer <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 10.2 Temperature measuring device 11 Verification of apparatus 11.1 Reference fluid check <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 11.2 Quality control checks 12 Procedure <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 13 Calculation 14 Expression of results 15 Precision 15.1 General <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 15.2 Repeatability, r 15.3 Reproducibility, R 16 Test report <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | Annex A (normative) Accepted reference values <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Liquid petroleum products. Vapour pressure – Determination of vapour pressure and calculated dry vapour pressure equivalent (DVPE) (Triple Expansion Method)<\/b><\/p>\n |