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GB/T 27895-2011: Natural gas -- Determination of the hydrocarbon dew point -- Cooled mirror method
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 27895-2011 | English | 169 |
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Natural gas -- Determination of the hydrocarbon dew point -- Cooled mirror method
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GB/T 27895-2011
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Basic data | Standard ID | GB/T 27895-2011 (GB/T27895-2011) | | Description (Translated English) | Natural gas -- Determination of the hydrocarbon dew point -- Cooled mirror method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | E24 | | Classification of International Standard | 75.060 | | Word Count Estimation | 7,797 | | Date of Issue | 2011-12-30 | | Date of Implementation | 2012-06-01 | | Quoted Standard | GB/T 13609 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 23 of 2011 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the use of chilled mirror visually detect pipeline gas hydrocarbon dew point test method is applicable to the treated single-phase pipeline gas, does not apply to liquid hydrocarbon -containing gas. This standard does not address its application to all relevant security issues. Before the use of this standard, the user has the responsibility to develop appropriate safety and protection measures, and clearly defining the scope. | GB/T 27895-2011: Natural gas -- Determination of the hydrocarbon dew point -- Cooled mirror method
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Natural gas. Determination of the hydrocarbon dew point. Cooled mirror method
ICS 75.060
E24
National Standards of People's Republic of China
Natural gas - Determination of hydrocarbon dew point
Chilled mirror visual method
Issued on. 2011-12-30
2012-06-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard by the National Standardization Technical Committee on Gas (SAC/TC244) centralized.
This standard was drafted. China Southwest Oil & Gas Field Branch, Research Institute of Petroleum, China Petroleum West - East Gas Pipeline Company.
The main drafters of this standard. Zeng Ping, Zhang rockets, cow tree Wei, late Yongjie, Luo Qin, Chang Hong Kong, Tang Meng, Wang Xiaoqin, Huang Liming.
Natural gas - Determination of hydrocarbon dew point
Chilled mirror visual method
1 Scope
This standard specifies the use to detect gas pipeline hydrocarbon dew Test Method for cooling the mirror visual method, this standard applies to single-treated
Phase gas pipeline, does not apply to liquid hydrocarbon-containing gas.
This standard does not address all of the safety issues related to its application. Before using this standard, the user has the responsibility to develop appropriate safety and
Protective measures, and clarify the scope of its qualified.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 13609 Gas sampling guidelines
Principle 3
Under constant pressure test, gas flow through the sample at a constant dew point measuring chamber polished metal mirror, the mirror temperature Keren
To reduce and can accurately measure. When the gas is gradually reduced as the temperature of the mirror, and just began to precipitate hydrocarbon condensate, then the measured mirror
Hydrocarbon dew point is the temperature of the gas at this pressure.
Note. The difference between the hydrocarbon dew point and water dew formation of shapes and colors on the mirror in Appendix A.
4 instruments and materials and reagents
4.1 can determine the dew point temperature at the measurement point at the actual temperature of the gas cooled mirror dew point meter and meet the following requirements.
a) measuring the dew point temperature in the range of the coolant temperature reaches ~ refrigeration ambient temperature;
b) instrumentation and transport ambient temperature -40 ℃ ~ 40 ℃;
c) meet the requirements of explosion-station;
d) the mirror temperature measurements accurate to ± 0.5 ℃, resolution of 0.1 ℃.
4.2 gauge. measuring pressures up to 15MPa, the accuracy rating of not less than 1.0.
4.3 --- coolant liquid carbon dioxide comply with the relevant standards, liquid nitrogen, liquid propylene and propane - butane mixtures thereof.
4.4 solvent. acetone or petroleum ether, AR.
4.5 tampons.
Preparation before 5 Test
5.1 dewpoint mirror should be carefully measured using tampons (4.5) dipped in solvent (4.4) wash.
5.2 Use soap bubble membrane seal check.
5.3 In the natural gas flow does not exceed 3L/min conditions, purge gas line 5min ~ 10min.
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