GB/T 4842-2006Argon (English PDF)

Foreword

This Standard replaces GB/T 4842-1995 "Pure argon" and GB/T 10624-1995

"High purity argon".

The main differences between this Standard AND GB/T 4842-1995, GB/T

10624-1995 are as follows.

- MERGE two standards into one;

- MODIFY the scope of high purity argon (Chapter 1 of this Standard, and

Chapter 1 of GB/T 10624-1995);

- ADD pallet-loaded, cluster-bottled, and tanker-loaded argon products. And

SPECIFY the inspection methods (4.1.3 of this Standard);

- MODIFY the normative references (Chapter 2 of this Standard, Chapter 2

of GB/T 4842-1995, and Chapter 2 of GB/T 10624-1995);

- MODIFY the contents of technical indicators. DELETE superior-class and

A-class products of high purity argon. DIVIDE pure argon's total carbon

content into methane, carbon monoxide, and carbon dioxide; high purity

argon's total carbon content is methane + carbon monoxide + carbon

dioxide, and it can be determined separately. ADJUST hydrogen, oxygen,

nitrogen, and water content. INCLUDE water content in purity calculation

(3.4.2 of this Standard, 3.4.1 of GB/T 4842-1995, and 3.4.1 of GB/T

10624-1995);

- MODIFY the sampling methods of pure argon (4.1.2 of this Standard,

Chapter 5 of GB/T 10624-1995);

- ADD new analysis method. ADD zirconia gas chromatography method to

determine hydrogen, oxygen, methane, and carbon monoxide in argon

gases. ADD ion migration gas chromatography method, argon ionization

gas chromatography method, and argon discharge ionization gas

chromatography method to determine hydrogen, oxygen, nitrogen,

methane, carbon monoxide, and carbon dioxide components in argon

gases. ADD other methods for the determination of water. When there

occurs a variety of analysis methods, add specified arbitration method (4.3

of this Standard);

- DELETE the method of adopting ion migration gas chromatography

method to determine nitrogen in argon gases, in previous standard (4.2 of

GB/T 10624-1995);

- ADD safety specifications (5.6 of this Standard);

- ADD the Normative Appendix A. And INCLUDE the methods of adopting

ion migration gas chromatography method, argon ionization gas

chromatography method, and argon discharge ionization gas

chromatography method to determine hydrogen, oxygen, nitrogen,

methane, carbon monoxide, and carbon dioxide components in argon

gases INTO this Appendix (Appendix A of this Standard).

Appendix A and Appendix B of this Standard are normative.

This Standard was proposed by China Petroleum and Chemical Industry

Association.

This Standard shall be centralized by the National Standardization Technical

Committee of Gases.

Main drafting organizations of this Standard. The Oxygen Co., Ltd. of Wuhan

Iron and Steel Group. Kena Science and Technology Development Co., Ltd. of

Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Beijing

Sys Ruitai Sciences and Technology Co., Ltd. and Southwest Research

Institute of Chemical Industry.

Main drafters of this Standard. Chen Wenyu, Wang Guiyue, Zhang Bingxin,

and Zhou Pengyun.

The previous versions replaced by this Standard are. GB 4842-1984, GB

4843-1984, GB 10624-1989, GB 10625-1989, GB/T 4842-1995, GB/T

10624-1995.

Argon

1 Scope

This Standard specifies the requirements, test methods, packaging, labeling,

storage, and security of pure argon and high purity argon.

This Standard applies to the gaseous and liquid pure argon, and high purity

argon extracted from the air and ammonia exhaust by cryogenic method; and

pure argon and high purity argon obtained by purification method. They are

mainly used in metal smelting and welding, semiconductor manufacturing,

electric light, preparation of standard samples, scientific research and other

industries.

Molecular formula. Ar.

Relative molecular mass. 39.948 (according to 2001 international relative

atomic mass).

2 Normative references

The provisions in following documents become the provisions of this Standard

through reference in this Standard. For dated references, the subsequent

amendments (excluding corrections) or revisions do not apply to this Standard,

however, parties who reach an agreement based on this Standard are

encouraged to study if the latest versions of these documents are applicable.

For undated references, the latest edition of the referenced document applies.

GB 190-1990 Labels for packages of dangerous goods

GB/T 3723 Sampling of chemical products for industrial use - Safety in

sampling

GB 5099 Seamless steel gas cylinders (GB 5099-1994, neq ISO 4705.

1993)

GB/T 5832.1 Determination of moisture in gases - Part 1.Electrolytic method

GB/T 5832.2 Determination of moisture in gases - Part 2.Dew point method

determination results, take the ion migration gas chromatography method as

arbitration method.

5 Labeling, packaging, storage, and security