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GB/T 27896-2018: Test method for water vapor content of natural gas -- Electronic moisture analyzers
Status: Valid GB/T 27896: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 27896-2018 | English | 119 |
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Test method for water vapor content of natural gas -- Electronic moisture analyzers
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GB/T 27896-2018
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| GB/T 27896-2011 | English | 239 |
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Test method for water vapor content of natural gas using -- Electronic moisture analyzers
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GB/T 27896-2011
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PDF similar to GB/T 27896-2018
Basic data | Standard ID | GB/T 27896-2018 (GB/T27896-2018) | | Description (Translated English) | Test method for water vapor content of natural gas -- Electronic moisture analyzers | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | E24 | | Classification of International Standard | 75.060 | | Word Count Estimation | 6,682 | | Date of Issue | 2018-09-17 | | Date of Implementation | 2019-04-01 | | Older Standard (superseded by this standard) | GB/T 27896-2011 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 27896-2018: Test method for water vapor content of natural gas -- Electronic moisture analyzers
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Test method for water vapor content of natural gas - Electronic moisture analyzers
ICS 75.060
E24
National Standards of People's Republic of China
Replace GB/T 27896-2011
Determination of water content in natural gas by electronic analysis
Published on.2018-09-17
Implementation of.2019-04-01
State Market Supervisory Administration
China National Standardization Administration issued
Content
Foreword I
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 equipment 2
5 Test step 2
6 repeatability 3
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 27896-2011 "Electronic Analysis Method for Determination of Water Content in Natural Gas", and GB/T 27896-2011
The main technical content changes except for editorial changes are as follows.
--- In the scope of the original standard on the "electronic moisture analyzer" footnote into the standard text;
--- Removed JJG500 from the canonical reference file and added GB/T 22634 (see Chapter 2, Chapter 2 of the.2011 edition);
--- In Chapter 3, "Terms and Definitions," the description of the capacitive sensor was modified (see 3.1, 3.1 of the.2011 edition);
--- Added in Chapter 3, "Terminology and Definitions" for Laser Sensors. "Some instruments do not require a specular laser to emit.
Light" (see 3.4, 3.4 of the.2011 edition);
--- Change "structure" to "material" (see 4.1.2,.2011 version 4.1.2);
--- Delete the original standard Chapter 5 "Calibration", add the traceability requirements in Chapter 4 "Equipment";
--- Added the requirement for measurement repeatability in Chapter 6.
This standard is under the jurisdiction of the National Natural Gas Standardization Technical Committee (SAC/TC244).
This standard was drafted. China National Petroleum Corporation Southwest Oil and Gas Field Branch Natural Gas Research Institute, China Oil and Gas
Daqing Oilfield Engineering Co., Ltd., China National Petroleum Corporation Huabei Oilfield Company, China National Petroleum Corporation
Institute of Exploration and Development, Co., Ltd., Institute of Chemistry, China Institute of Testing Technology.
The main drafters of this standard. He Bin, Luo Qin, Xu Wenxiao, Zhang Hanpei, Mei Yonggui, Gao Lixin, Li Wei, Yan Qituan, Deng Fanfeng.
The previous versions of the standards replaced by this standard are.
---GB/T 27896-2011.
Determination of water content in natural gas by electronic analysis
1 Scope
This standard specifies the test method for determining the water content of natural gas using an electronic moisture analyzer.
This standard applies to the determination of water content in natural gas.
This standard does not address all security issues related to its application. Before using this standard, users are responsible for establishing appropriate safety and
Protection measures and clarify the scope of their limitations.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 13609 Natural Gas Sampling Guidelines
GB/T 20604 natural gas vocabulary
GB/T 22634 conversion between natural gas water content and water dew point
3 Terms and definitions
The following terms and definitions as defined in GB/T 20604 apply to this document.
3.1
Capacitance sensorcapacitance-typesensor
Aluminum coated with an aluminum oxide (Al2O3) coating is part of the capacitor. Dielectric Al2O3 film changes electricity
The capacitance of the container is associated with the presence of water vapor. The operation principle of the silicon component is the same, and its capacitance occurs with adsorption or analysis of water vapor.
Variety.
3.2
Electrolytic sensor electrolytic-typesensor
It consists of two metal electrodes coated with a phosphorus pentoxide (P2O5) coating. The voltage applied between the electrodes causes the phosphorus pentoxide (P2O5) to be coated.
The water absorbed by the layer undergoes an electrolytic reaction to generate a current between the electrodes, and the generated current is proportional to the concentration of the water vapor.
3.3
Piezoelectric sensor piezoelectric-typesensor
It consists of a pair of electrodes supporting a quartz crystal (QCM) sensor. When the sensor is applied with a voltage, it produces a very stable vibration.
The surface of the sensor is coated with a hygroscopic polymer coating. The vibration frequency changes proportionally with the change in the moisture absorbed by the polymer.
3.4
Laser sensor laser-typesensor
It is composed of a sample chamber, one end of which is mounted with an optical head and the other end is provided with a mirror surface. Optical head contains near infrared (NIR) laser
The laser emits light of a known wavelength that can be absorbed by water molecules. A light sensitive detection of NIR wavelengths is installed next to the laser
Device. The light emitted by the laser passes through the sample chamber and returns to the detector of the optical head at the end. Emit light through the sample chamber and return detection
When the device is emitted, part of the emitted light is absorbed by the water molecules, and the absorbed light intensity is proportional to the water content.
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