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GB/T 46024-2025: Paints and varnishes - Determination of flow time by use of flow cups
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 46024-2025 | English | 354 |
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Paints and varnishes - Determination of flow time by use of flow cups
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GB/T 46024-2025
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Basic data | Standard ID | GB/T 46024-2025 (GB/T46024-2025) | | Description (Translated English) | Paints and varnishes - Determination of flow time by use of flow cups | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G50 | | Classification of International Standard | 87.040 | | Word Count Estimation | 18,154 | | Date of Issue | 2025-08-01 | | Date of Implementation | 2026-02-01 | | Older Standard (superseded by this standard) | GB/T 6753.4-1998 | | Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China | GB/T 46024-2025: Paints and varnishes - Determination of flow time by use of flow cups---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT46024-2025
ICS 87.040
CCSG50
National Standard of the People's Republic of China
Replaces GB/T 6753.4-1998
Determination of flow time using a flow cup for paints and varnishes
(ISO 2431.2019, IDT)
Released on August 1, 2025
Implementation on February 1, 2026
State Administration for Market Regulation
The National Standardization Administration issued
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces GB/T 6753.4-1998 "Paints and varnishes - Determination of flow time using a flow cup".
In addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) The scope has been changed (see Chapter 1, Chapter 1 of the.1998 edition);
b) The definitions of dynamic viscosity and irregular flow have been deleted (see Chapter 3 of the.1998 edition);
c) Added the definition of non-Newtonian flow (see Chapter 3);
d) The temperature conditions have been changed (see Chapter 4, Chapter 4 of the.1998 edition);
e) Increased the measuring range of the outflow cup (see 5.1.5);
f) Changed the accuracy requirements for stopwatches or other applicable timers (see 5.2.5; 5.2.5 of the.1998 edition);
g) Added the identification of test results (see Chapter 8);
h) The precision requirements have been changed (see Chapter 9, Chapter 8 of the.1998 edition);
i) Changed "Use the dispensing cup to adjust the viscosity of the paint" to "Check the wear of the dispensing cup" and modified the corresponding technical content
(See Appendix A, Appendix A of the.1998 edition).
This document is equivalent to ISO 2431.2019 "Paints and varnishes - Determination of flow time using a flow cup".
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Petroleum and Chemical Industry Federation.
This document is under the jurisdiction of the National Technical Committee on Standardization of Paints and Pigments (SAC/TC5).
This document was drafted by. Yejian New Materials Co., Ltd., CNOOC Changzhou Coatings and Chemical Research Institute Co., Ltd., Fujian Shangruo Engineering
Technology Co., Ltd., Guohengxin (Changzhou) Testing and Certification Technology Co., Ltd., Zhejiang Yutong New Materials Co., Ltd., and Biaogeda Precision Instruments
(Guangzhou) Co., Ltd., Zhejiang Shangpin Feijiao Paint Co., Ltd., Zhejiang Daqiao Paint Co., Ltd., Changzhou Wujin Chenguang Metal Paint Co., Ltd.
Company, Guangzhou Shenghua Industrial Co., Ltd., Baoji Chushi Metal Detection Co., Ltd., Pushen Testing Instruments (Shanghai) Co., Ltd.,
China Railway Baoqiao (Yangzhou) Co., Ltd., Shuangta Coating Technology Co., Ltd., Changzhou Institute of Technology, Hubei Basite Technology Co., Ltd., Shandong Ben
Teng Paint Industry Co., Ltd., Jiangsu Zhaohui Chemical Co., Ltd., South China University of Technology, Chengdu Product Quality Inspection Institute Co., Ltd.,
Changzhou Tianan Special Coating Co., Ltd. and Changzhou Inspection, Testing, Standards and Certification Institute.
The main drafters of this document are. Ji Wei, Lin Jinzong, Shi Jianqun, Gu Huiqi, Yang Yaliang, Su Na, Peng Jufang, Lin Qiao, Wang Lei, Chen Cheng, Shen Jianlong,
Jing Xionggang, Sun Dewang, Li Qiang, Xu Wenbin, Wu Ruilang, Meng Dequn, Zhang Minhui, Ma Chunfeng, Liu Zhiwei, Sun Yunkai, Zhao Ganggang, Gu Qiang, and Fang Juan.
The previous versions of the documents replaced by this document are as follows.
--- First published as GB/T 6753.4-1986 in 1986, first revised in.1998;
Determination of flow time using a flow cup for paints and varnishes
1 Scope
This document describes a method for determining the flow time of paints, varnishes and related products, which can be used to monitor viscosity.
This document specifies four types of outflow cups with similar dimensions and outflow apertures of 3 mm, 4 mm, 5 mm and 6 mm, and provides
Two methods for checking discharge cup wear (see Appendix A).
This document does not cover outlet cups with replaceable outlet orifices, as the cup body to which the outlet orifice is mounted does not meet the tolerance requirements.
This document does not cover commonly used immersion discharge cups.
NOTE. Since the manufacturing tolerances of this type of outflow cup are greater than those specified in this document, the accuracy of outflow time obtained using an immersed outflow cup is low.
The accuracy of the outflow time obtained using the outflow cups specified in this document (see Chapter 9) is the basis for the accuracy of the outflow time obtained using the outflow cups specified in this document (see Chapter 9).
The method described in this document is applicable to test materials for which the breakpoint of the flow from the outflow hole of the outflow cup can be accurately determined.
Due to the influence of the response, for materials with outflow time close to the upper limit of the test range (100s), the breakpoint is difficult to determine and reproduce.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
oftestsamples)
Note. GB/T 20777-2006 Paints and varnishes - Examination and preparation of test specimens (ISO 1513.1992, IDT)
ISO 4618 Paints and varnishes—Vocabulary
Note. GB/T 5206-2015 Paints and varnishes - Terms and definitions (ISO 4618.2014, IDT)
ISO 15528 Paints, varnishes and draw materials for paints and varnishes
Note. GB/T 3186-2006 Paints, varnishes and raw materials for paints and varnishes Sampling (ISO 15528.2000, IDT)
3 Terms and Definitions
For the purposes of this document, the terms and definitions defined in ISO 4618 and the following apply.
ISO and IEC maintain terminology databases used for standardization work at the following addresses.
3.1
flowtime
The moment when the test material starts to flow out of the outflow hole of the filled outflow cup to the moment when the material flow near the outflow hole is initially interrupted
The time that has passed.
3.2
Newtonian flow
Shear viscosity is a property that is independent of shear rate, shear stress and time.
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