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GB/T 5832.2-2016Gas analysis - Determination of water - Part 2: Dew point method (English PDF)

气体分析微量水分的测定第2部分：露点法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 13, 2016

Implementation date

July 1, 2017

Scope

GB/T 5832.2-2016 is the English-translated version of 气体分析微量水分的测定第2部分：露点法.

GB/T 5832.2-2016 is the Chinese standard "Gas analysis - Determination of water - Part 2: Dew point method". Its scope clause reads: This part of GB/T 5832 specifies the method for the determination of trace moisture in gases by dew point method.

This part is suitable for the determination of trace moisture in gases such as hydrogen, oxygen, nitrogen, helium, neon, argon, krypton, xenon, nitrous oxide and the like.

Discomfort A gas used to condense before the condensation of water, and a gas that reacts with moisture. This part of the application for 0 °C ~ -100 °C gas dew point determination. Its clauses include normative reference documents; principle; dew point meter.

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Document preview — GB/T 5832.2-2016

National Standard of the People's Republic of China

ICS: 71.040.40
Classification: G 86
Replacing: GB/T 5832.2-2008

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1 Scope
2 normative reference documents
3 principle
4 dew point meter

1 Scope

This part of GB/T 5832 specifies the method for the determination of trace moisture in gases by dew point method.

This part is suitable for the determination of trace moisture in gases such as hydrogen, oxygen, nitrogen, helium, neon, argon, krypton, xenon, nitrous oxide and the like. Discomfort

A gas used to condense before the condensation of water, and a gas that reacts with moisture.

This part of the application for 0 °C ~ -100 °C gas dew point determination.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article

Pieces. For undated references, the latest edition (including all modifications) applies to this document.

General rules for sampling safety of industrial chemical products GB/T 3723

3 principle

Will be placed in a constant pressure gas atmosphere in the smooth metal mirror gradually cooling cooling, the gas and gas in the water to keep the partial pressure

Change until the moisture in the gas reaches saturation and form dew (frost) on the mirror. The instantaneous temperature (i.e., dew point) of the dew (dew) was measured. In the dew

At the point temperature, the ratio of the saturated vapor pressure of the water to the gas pressure in the cell is the moisture content expressed as the volume fraction. Different dew point temperature

Degrees correspond to different moisture content. The moisture content of the gas is directly expressed as the dew point temperature of the moisture.

4 dew point meter

4.1 Instrument Description

The dew point meter should be measured by the gas and test tank system, polished mirror and dew (frost) observation system, cooling cooling and control system, dew point temperature measurement

System and other components. The instrument's airway system typically includes a measuring cell, a connecting line and a joint, and a flow control valve.

4.2 dew point of the basic requirements

4.2.1

Cooling capacity should be compatible with the moisture content of the sample gas. The cooling rate should be regulated.

4.2.2

Sample air flow should be regulated.

4.2.3

The formation of dew (frost) should be accurately observed.

4.2.4

Temperature measurement The temperature measured should be the same as the mirror temperature.

4.2.5

The instrument can withstand the pressure should be measured with the requirements.

4.2.6

The instrument shall have no cooling effect, that is, the airway system other than the mirror shall be free of moisture when the temperature is close to or below the moisture dew point phenomenon.

4.2.7

Mirror should have good optical properties, hydrophobic, thermal conductivity, corrosion resistance, high hardness.

4.2.8

Determine the volume of the pool as small as possible. The airway system should be free of dead volume, with good hydrophobicity, good chemical inertness, good gas […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Cited by

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Editions of GB/T 5832.2

Edition	Title	Revision	Status
GB/T 5832.2-2016	Gas analysis - Determination of water - Part 2: Dew point method	current edition	Current
GB/T 5832.2-2008	Gas analysis - Determination of water - Part 2: Dew point method	previous edition	Superseded

This page sells the current edition, GB/T 5832.2-2016. Earlier editions are listed for reference only.

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