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GB/T 9109.5-2017: Petroleum and liquid petroleum products dynamic measurement -- Part 5: Calculation of oil quantities Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 9109.5: Historical versions
Similar standardsGB/T 9109.5-2017: Petroleum and liquid petroleum products dynamic measurement -- Part 5: Calculation of oil quantities---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT9109.5-2017 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 75.180.30 E 98 Replacing GB/T 9109.5-2009 Petroleum and liquid petroleum products dynamic measurement - Part 5.Calculation of oil quantities (ISO 4267-2.1988, Petroleum and liquid petroleum products - Calculation of oil quantities - Part 2.Dynamic measurement, NEQ) Issued on. MAY 12, 2017 Implemented on. DECEMBER 01, 2017 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of PRC; National Standardization Administration. Table of ContentsForeword... 3 Introduction... 5 1 Scope... 6 2 Normative references... 6 3 Terms, definitions, symbols... 7 4 Significant digits of measurement parameters and numerical rounding... 10 5 Preparation of basic data... 12 6 Fuel quantity calculation formula... 13 7 Measurement bills... 19 8 Calculation method of oil quantity... 22 Appendix A (Normative) Measurement data reading rules... 32 Appendix B (Normative) Calculation method of oil volumetric pressure correction factor... 35 Appendix C (Normative) Hydrocarbon compressibility factor... 37 Appendix D (Normative) Conversion of petroleum and liquid petroleum products from 20 °C density to 15 °C density... 38 Appendix E (Informative) Air buoyancy correction factor table... 40 Appendix F (Informative) Format and content of measurement bills... 41 Appendix G (Normative) Conversion factor from 15 °C density to barrel/t... 421 ScopeThis Part of GB/T 9109 specifies the oil quantity calculation method for dynamic measurement of petroleum and liquid petroleum products (hereinafter referred to as oil); defines the terms and symbols used in the dynamic measurement of oil products; gives the weight in air under different measurement methods using different measuring instruments, OR the formula for calculating the oil quantity under standard reference conditions; provides the relevant measurement parameters, correction factors, corresponding formulas and tables, which are involved in the calculation of the oil quantity. This Part only applies to the dynamic measurement of single-phase oil products. This Part does not apply to the oil quantity calculation of liquefied petroleum gas and stable light hydrocarbons.2 Normative referencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard. GB/T 260 Test method for water in petroleum products - Distillation method GB/T 1884 Crude petroleum and liquid petroleum products - Laboratory determination of density - Hydrometer method GB/T 1885-1998 Petroleum measurement tables GB/T 4756 Method for manual sampling of petroleum liquids GB/T 6531 Crude petroleum and fuel oils - Determination of sediment - Extraction method3 Terms, definitions, symbolsThe following terms, definitions, symbols apply to this document. 3.1 Terms and definitions 3.1.1 Indicated volume or mass During measurement, the oil value displayed by the flowmeter counter or other display unit, including water and sediment transported through the flowmeter. 3.1.2 Total observed volume or mass The indicated volume or mass as multiplied by the flowmeter factor corresponding to the oil product and its flow rate. This value is not corrected for temperature and pressure. 3.2 Symbols See Table 1.4 Significant digits of measurement parameters andnumerical rounding 4.1 Effective digits of measurement parameters 4.1.1 Depending on the density reading and density conversion, keep 1 decimal place, that is, 0.1 kg/m3. 4.1.2 Measurement of moisture content in oil (distillation method), round to two decimal places 0.01%. 4.2 Numerical rounding off 4.2.1 The numerical rounding off method shall comply with the provisions of GB/T 8170.In most cases, the number of decimal places used is affected by the data source. In the absence of other limiting factors, rounding off shall be performed, according to the decimal places specified in Table 2. 4.2.2 MF, Ctl, Cpl, Csw, Fa shall be rounded to the fourth decimal place, in accordance with the provisions of GB/T 8170. 4.2.3 The oil quantity settlement value follows the requirements of GB/T 8170; the volume value is rounded to 0.001 m3; the mass value is rounded to 0.001 t. Example.5 Preparation of basic data5.1 Overview In order to obtain accurate results of the oil quantity (volume or mass), which is measured by the flowmeter, it shall first ensure that the basic data for calculating the oil quantity (such as the indicated volume of the flowmeter, measuring temperature, measuring pressure, density, moisture content, etc.) are obtained, in accordance with the standard method (or procedure) (see Appendix A); 5.2 Flowmeter The accuracy level of flowmeters, which are used for trade transfer measurement, shall be no less than level 0.2. 5.3 Measuring temperature The measurement temperature of oil products shall be measured or recorded, using a mercury-in-glass thermometer, which has a graduation value of not less than 0.2 °C, OR other types of temperature transmitters, which are not lower than the same accuracy requirements. 5.4 Measuring pressure Oil measuring pressure shall be measured or recorded, using a 0.4 grade pressure gauge or other types of pressure transmitters, which are not lower than the same accuracy requirements. 5.5 Sampling Oil sampling shall be carried out, in accordance with the requirements specified in GB/T 4756 or GB/T 27867. 5.6 Density 5.7 Moisture content It is measured according to GB/T 8929; it can also be measured according to GB/T 260 and GB/T 6531.6 Fuel quantity calculation formula6.1 Method overview 6.1.1 The settlement basis for oil trade is divided into weight or volume in the air. Therefore, oil quantity calculation is also divided into two methods. 6.1.3 Taking the volume-weight method as an example (flowmeter factor method), during the measurement period, record the indicated volume (Vt), 6.2 Volume settlement 6.2.1 Calculation formula 6.2.2 Calculation steps 6.2.2.1 Determine Vt The indicated volume, which is measured by the flowmeter under measuring pressure, is calculated according to formula (4). If the flowmeter uses K factor, the indicated volume, which is measured by the flowmeter under metering pressure, is calculated according to formula (5). 6.2.2.4 Determine Cpl If the reading of the flowmeter has been corrected by pressure compensation, OR the impact at low pressure is less than 0.01%, then set Cpl = 1.0000; otherwise, calculate it according to formula (6). 6.2.2.6 Determine Vsw Vsw is calculated according to formula (8). 6.2.2.7 Calculation formula of mass flowmeter volume Vgs is calculated according to formula (9). 6.3 Settlement based on weight in air It is divided into three types according to the measurement method. One is a flowmeter based on volume measurement coupled with a glass float meter. 6.3.1 Measurement method of flowmeter coupled with glass float meter 6.3.2 Measurement method of flowmeter with online density meter 6.3.3 Mass flowmeter measurement method 6.3.3.2 Calculation steps 6.3.4 Calculation formula of oil moisture content msw is calculated according to formula (26).7 Measurement bills7.1 Measurement data requirements 7.1.1 Use standardized conditions and prescribed calculation procedures, to obtain consistent calculation results from the same set of oil quantity data; standardize the calculation rules for oil quantity (volume or mass). 7.1.3 Ensure that copies of measurement bills (including faxes) are clearly written, unless the relevant parties agree to make modification or deletion on the measurement bills. 7.1.4 If there is an error in the measurement bill, the bill shall be marked "invalid" and a new bill shall be prepared. 7.3 Format and content of measurement bills Please refer to Appendix F for the format and content of the measurement bill.8 Calculation method of oil quantity8.1 Calculation of standard volume of oil products 8.1.2 Calculation of oil quantity using basic error method According to formula (1), calculate the net standard volume of oil. 8.1.3 Calculation of oil quantity using flowmeter factor method 8.2 Calculation of oil quality and weight in air 8.2.1 Measurement example For continuous measurement of long-distance crude oil pipelines, a flowmeter with a glass float meter is used to manually measure the density; meanwhile the flowmeter factor is used, to calculate the weight of oil in the air. The measured values of the metrological parameters are as shown in Table 7. 8.2.4 Temperature correction factor Ctl From t = 37.75 °C and ρ20 = 845.3 kg/m3, see Table 8. 8.2.5 Pressure correction factor Cpl 8.4 Calculation of oil products measured using K factor method Diesel at a metering station is measured using a turbine flowmeter. The measured values and calculation procedures of the measurement parameters are as shown in Table 11. 8.4.5 Deduction of moisture content The measured oil is trade transfer oil, so the moisture content shall be deducted. 8.4.6 Calculation of volume under different standard reference conditions 8.4.6.3 Volume calculation at 60 °F and 101.325 kPa The original measurement data and measurement procedures are as shown in Table 14. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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