GB/T 3915-2021Styrene for industrial use (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

This document replaces GB/T 3915-2011 "Industrial Styrene". Compared with GB/T 3915-2011, except for editorial changes, the main The technical changes are as follows.

a) The description of the propylene oxide co-production process has been added to the "Scope" chapter (see Chapter 1, Chapter 1 of the 2011 edition);

b) Two chapters "Terms and Definitions" and "Product Classification" have been added (see Chapters 3 and 4);

c) Modified the product index classification method (see Table 1, Table 1 in the 2011 edition);

d) Modified the product appearance index requirements (see Table 1, Table 1 of the 2011 edition);

e) Added quality indicators for phenylacetylene and total sulfur projects (see Table 1, Table 1 in the 2011 edition);

f) Move the water and benzene items to Table 1 (see Table 1, Chapter 4 of the 2011 edition);

g) The test methods for phenylacetylene and total sulfur have been added (see Table 1, Table 1 of the 2011 edition);

h) Added water test methods and arbitration methods (see Table 1, Chapter 4 of the 2011 edition);

i) The test method and arbitration method of chromaticity have been added (see Table 1, Table 1 of the 2011 edition);

j) The relevant regulations for the use of other polymerization inhibitors have been added (see Table 1, Table 1 of the 2011 edition);

k) Added test methods and arbitration methods for polymerization inhibitors (see Table 1, Table 1 in the 2011 edition);

l) Modified sampling and inspection rules (see Chapter 6 and Chapter 7, Chapter 4 of the 2011 edition);

m) Modified marking, packaging, transportation and storage (see Chapter 8 and Chapter 9, Chapter 5 of the 2011 edition);

n) Move the safety-related reminder content into Appendix A (see Appendix A, Chapter 6 of the 2011 edition);

o) The content that is compared with the chapter number of ASTM D2827-08 is deleted (see Appendix A of the 2011 edition).

1 Scope

This document specifies the product classification, technical requirements and test methods, sampling, inspection rules, marking, labeling and accompanying of styrene for industrial use. Documents, packaging, transportation and storage.

This document is applicable to industrial styrene produced by ethylbenzene dehydrogenation process, propylene oxide co-production process and pyrolysis gasoline extraction process.

The structural formula of styrene. C6H5-CH=CH2, relative molecular mass. 104.15 (according to 2018 international relative atomic mass).

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 605 General method for color determination of chemical reagents

GB/T 3723 General Rules for Sampling Safety of Industrial Chemical Products

GB/T 6283 Determination of water content in chemical products Karl Fischer method (general method)

GB/T 6324.6 Test methods for organic chemical products Part 6: Determination of the color of liquids Tristimulus colorimetry

GB/T 6324.8 Test Methods for Organic Chemical Products Part 8: Determination of Moisture in Liquid Products Karl Fischer Coulometric Method

GB/T 6678 General Rules for Sampling of Chemical Products

GB/T 6680 General Rules for Sampling of Liquid Chemical Products

GB/T 8170 Numerical rounding rules and the expression and determination of limit values

GB/T 12688.1 Test method of styrene for industrial use. Part 1: Determination of purity and hydrocarbon impurities. Gas chromatography

GB/T 12688.3 Test method of styrene for industrial use Part 3: Determination of polymer content

GB/T 12688.4 Test method of styrene for industrial use. Part 4: Determination of peroxide content by titration method

GB/T 12688.5 Test method of styrene for industrial use. Part 5: Determination of total aldehyde content by titration method

GB/T 12688.8 Test method of styrene for industrial use Part 8: Determination of polymerization inhibitor (p-tert-butylcatechol) content Photometric method

GB/T 12688.9 Test method of styrene for industrial use Part 9: Determination of trace benzene gas chromatography

GB/T 12688.10 Test method of styrene for industrial use. Part 10: Determination of oxygenated compounds. Gas chromatography

SH/T 1147 Determination of Trace Sulfur in Industrial Aromatics by Microcoulometric Method

SH/T 1820 Industrial aromatic hydrocarbons. Determination of trace sulfur. Ultraviolet fluorescence method

3 Terms and definitions

There are no terms and definitions that need to be defined in this document.