GB/T 23855-2018 English PDF

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GB/T 23855-2018: Liquid sulphur trioxide
Status: Valid

GB/T 23855: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 23855-2018	199	Add to Cart	3 days	Liquid sulphur trioxide	Valid
GB/T 23855-2009	479	Add to Cart	3 days	Liquid sulfur trioxide	Obsolete

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Basic data

Standard ID: GB/T 23855-2018 (GB/T23855-2018)
Description (Translated English): Liquid sulphur trioxide
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G11
Classification of International Standard: 71.060.30
Word Count Estimation: 10,157
Date of Issue: 2018-02-06
Date of Implementation: 2018-09-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 23855-2018: Liquid sulphur trioxide

---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.
Liquid sulphur trioxide ICS 71.060.30 G11 National Standards of People's Republic of China Replacing GB/T 23855-2009 Liquid sulfur trioxide Published on.2018-02-06 2018-09-01 Implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Administration released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard supersedes GB/T 23855-2009 “Liquid Sulfur Trioxide”. Compared with GB/T 23855-2009, the main technical changes are as follows. --- Modify the amount of sample to determine the mass fraction of sulfur trioxide and sulfur dioxide (see 4.3.3 and 4.4.3,.2009 version 4.2.4 and 4.3.3); --- Modify the reference solution for spectrophotometric determination of iron mass (see 4.6.1.4.1 and 4.6.1.4.3,.2009 edition of 4.5.4.2 And 4.5.4.3); --- Increased the visual colorimetric method as the second analytical method for the determination of iron mass fraction, the original spectrophotometric method as the arbitration method (see 4.6.2); --- Revised the formula for formulating the calculation formula for the determination of sulfur trioxide, sulfur dioxide, ash and iron mass fraction, and added the calculation result table The number of digits or significant digits after the decimal point is specified (see 4.3.4, 4.4.4, 4.5.4, and 4.6.1.5, 4.2.5 of the.2009 edition). 4.3.4, 4.4.4 and 4.5.5); --- Modify the requirements of the inspection rules (see 5.1, 5.2 and 5.3,.2009 version 5.1, 5.2, 5.3 and 5.5); --- Modify the requirements for marking, packaging, transportation and storage (see 6.1 and 6.3,.2009 version 6.1 and 6.3); --- Modify the security requirements (see 7.3 and 7.4,.2009 version 7.2 and 7.4). This standard is proposed by China Petroleum and Chemical Industry Federation. This standard is under the jurisdiction of the Technical Committee for Sulfur and Sulfuric Acid of the National Chemical Standardization Technical Committee (SAC/TC63/SC7). This standard was drafted by. Nanhua Group Research Institute, Hubei Xingfa Chemical Group Co., Ltd., and Huaian City Product Quality Supervision and Inspection Institute. Suzhou Shuangshi Environmental Technology Co., Ltd., Tianjin Yuda Sulfuric Acid Industry Co., Ltd., and Shandong Jianlong Chemical Industry Co., Ltd. The main drafters of this standard are Feng Junting, Li Shaoping, Tang Lizhong, Qiu Ailing, Yang Zhu, Gu Linjian, Liu Qiang, Liu Qinxue, Yao Yefeng, and Wu Bin. The previous versions of the standard replaced by this standard are. --- GB/T 23855-2009. Liquid sulfur trioxide Caution—The liquid sulfur trioxide is highly corrosive and hygroscopic. Wear protective equipment when handling. Persons using this standard should There is practical experience in regular laboratory work. This standard does not indicate all possible security issues. Users have the responsibility to take appropriate safety And health measures, and to ensure compliance with the conditions stipulated by relevant national laws and regulations.

1 Scope

This standard specifies the technical requirements, test methods, inspection rules and signs, packaging, transportation, storage and safety of liquid sulfur trioxide. This standard applies to industrial liquid sulfur trioxide.

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 version (including all amendments) applies to this document. GB 190 Dangerous Goods Packaging Mark GB/T 191 packaging, storage and transportation logo Preparation of GB/T 601 Chemical Reagent Standard Titration Solution Preparation of GB/T 602 standard solution for determination of impurities in chemical reagents Preparation of preparations and products used in GB/T 603 chemical reagent test methods GB/T 6678-2003 General Sampling of Chemical Products GB/T 6680-2003 sampling rules for liquid chemical products GB/T 6682 Analysis Laboratory Water Specifications and Test Methods GB/T 8170 Representation and Determination of Numerical Rounding Rules and Limit Values GB 12268 List of dangerous goods Preparation of GB 15258 Chemical Safety Label

3 Technical requirements

The quality of liquid sulfur trioxide should meet the requirements of Table 1. Table 1 project index Excellent product quality products Appearance colorless transparent liquid colorless transparent or brown liquid - Sulfur trioxide (SO3) mass fraction/% ≥ 99.7 99.5 99.0 Sulfur dioxide (SO2) mass fraction /% ≤ 0.20 0.40 - Ash content/% ≤ 0.05 0.40 - Iron (Fe) mass fraction /% ≤ 0.020 0.030 - Note. The "-" in the indicator indicates that there is no such item in the technical requirements of this category of product. ......

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