GB/T 9109.5-2017 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 9109.5-2017 | English | 500 |
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Petroleum and liquid petroleum products dynamic measurement -- Part 5: Calculation of oil quantities
| Valid |
| GB/T 9109.5-2009 | English | RFQ |
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6 days
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Petroleum and liquid petroleum products -- Calculation of oil quantities -- Dynamic measurement
| Obsolete |
| GB/T 9109.5-1988 | English | RFQ |
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3 days
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Dynamic measurement of crude oil--Calculation of oil quantities
| Obsolete |
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GB/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 Contents
Foreword... 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... 42
1 Scope
This 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 references
The 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
method
3 Terms, definitions, symbols
The 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 and
numerical 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 data
5.1 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 formula
6.1 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 bills
7.1 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 quantity
8.1 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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