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GB/T 538: Historical versions
| Std ID | Version | USD | Buy | Deliver [PDF] in | Title (Description) |
| GB/T 538-2018 | English | 119 |
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Boric acid for industrial use
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| GB/T 538-2006 | English | 279 |
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Boric acid for industrial use
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| GB/T 538-1990 | English | 199 |
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Boric acid for industrical use
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Basic data
| Standard ID | GB/T 538-2018 (GB/T538-2018) |
| Description (Translated English) | Boric acid for industrial use |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | G11 |
| Classification of International Standard | 71.060.30 |
| Word Count Estimation | 6,689 |
| Date of Issue | 2018-06-07 |
| Date of Implementation | 2019-01-01 |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
GB/T 538-2018: Boric acid for industrial use
---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.
Boric acid for industrial use
ICS 71.060.30
G11
National Standards of People's Republic of China
Replace GB/T 538-2006
Industrial boric acid
Published on.2018-06-07
2019-01-01 implementation
State market supervision and administration
China National Standardization Administration issued
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 538-2006 "Industrial Boric Acid", compared with GB/T 538-2006, except for editorial changes, the main technical changes
The following is as follows.
--- Increased classification of industrial boric acid (see Chapter 4);
--- Adjusted the sulfate content index requirements for general industrial boric acid qualified products (see Chapter 5.2 of the 5.2,.2006 edition);
--- Removed the ammonia content indicator requirements for general industrial boric acid and the footnotes of the corresponding table (see Chapter 4 of the.2006 edition);
--- Added requirements for boric acid for the nuclear industry (see 5.3).
This standard was proposed by the China Petroleum and Chemical Industry Federation.
This standard is under the jurisdiction of the National Chemical Standardization Technical Committee of the Inorganic Chemical Subcommittee (SAC/TC63/SC1).
This standard was drafted. Dalian Jinma Boron Technology Group Co., Ltd., Shenzhen Junnuo Testing Co., Ltd., Qinghai Zhongtian Boron Lithium Mine
Industry Co., Ltd., Qinghai Salt Lake Research Institute of Chinese Academy of Sciences, China Guangdong Nuclear Power Engineering Co., Ltd., CNOOC Tianjin Chemical Research and Design Institute Co., Ltd.
The main drafters of this standard. Cao Zhongwen, Yuan Guodong, Zhang Chenxi, Wei Ming, Li Xuebin, Hu Wenqing, Zhang Mao, Wang Min, Wang Yan.
The previous versions of the standards replaced by this standard are.
---GB/T 538-1965, GB/T 538-1982, GB/T 538-1990, GB/T 538-2006.
Industrial boric acid
Warning---According to the list of hazardous chemicals (2015 edition), boric acid is a dangerous chemical and should be handled with care.
1 Scope
This standard specifies the technical requirements, test methods, inspection rules and marking, labeling, packaging, transportation and storage of industrial boric acid.
This standard applies to industrial boric acid. This product is mainly used in glass, enamel, chemical, building materials, nuclear industry and optical glass industries.
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 191-2008 packaging storage and transportation icon
General rules for sampling GB/T 6678 chemical products
GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values
GB/T 12684-2018 Industrial boride analysis method
3 Molecular formula and relative molecular mass
Molecular formula. H3BO3.
Relative molecular mass. 61.83 (according to.2016 international relative atomic mass).
4 classification
According to the use of industrial boric acid, it is divided into two categories.
---I is for general industrial use;
--- Class II is used in the nuclear industry.
5 requirements
5.1 Appearance. Industrial boric acid should be white powdery crystal or scaly ribbon with three oblique axes.
5.2 Class I boric acid products shall be tested in accordance with the test methods specified in this standard in accordance with Table 1.
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