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GB/T 18950-2023: Rubber and plastics hoses - Methods of exposure to laboratory light sources - Determination of changes in colour, appearance and other physical properties
Status: Valid GB/T 18950: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 18950-2023 | English | 404 |
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Rubber and plastics hoses - Methods of exposure to laboratory light sources - Determination of changes in colour, appearance and other physical properties
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GB/T 18950-2023
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| GB/T 18950-2003 | English | 239 |
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Rubber and plastics hoses -- Determination of ultra-violet resistance under static conditions
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GB/T 18950-2003
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PDF similar to GB/T 18950-2023
Basic data | Standard ID | GB/T 18950-2023 (GB/T18950-2023) | | Description (Translated English) | Rubber and plastics hoses - Methods of exposure to laboratory light sources - Determination of changes in colour, appearance and other physical properties | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G42 | | Classification of International Standard | 23.040.70 | | Word Count Estimation | 22,245 | | Date of Issue | 2023-09-28 | | Date of Implementation | 2024-04-01 | | Older Standard (superseded by this standard) | GB/T 18424-2001,GB/T 18950-2003 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 18950-2023: Rubber and plastics hoses - Methods of exposure to laboratory light sources - Determination of changes in colour, appearance and other physical properties
---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.
ICS 23.040.70
CCSG42
National Standards of People's Republic of China
Replace GB/T 18424-2001, GB/T 18950-2003
Laboratory light source exposure test method for rubber and plastic hoses
Determination of changes in color, appearance and other physical properties
(ISO 30013.2011,IDT)
Published on 2023-09-07
2024-04-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document replaces GB/T 18424-2001 "Determination of color and appearance changes of rubber and plastic hoses exposed to xenon arc lamp" and
GB/T 18950-2003 "Determination of static UV resistance of rubber and plastic hoses". This document is consistent with GB/T 18424-2001 and
Compared with GB/T 18950-2003, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
---Added a chapter of "Terms and Definitions" (see Chapter 3);
--- Added "measurement of changes in selected physical properties" to the test principle (see Chapter 4, Appendix C);
---Added type 4 specimens among the specimen types (see 5.1);
---The calculation formula for the length of type 1 specimen has been changed (see 5.1.2, 4.1.1 of GB/T 18950-2003);
---Added "open carbon arc lamp" light source and exposure cycle (see 6.4);
---Changed the requirements for xenon arc lamp test temperature, test chamber relative humidity and test time (see 6.2.2.1, GB/T 18424-2001
of 6.4);
---Changed the requirements for fluorescent UV lamp test temperature, test chamber relative humidity and test time (see 6.3.2.1, GB/T 18950-
Chapter 7 of.2003);
--- Added requirements for specimen installation (see 7.2);
---Deleted the protection of operators (see Appendix A of GB/T 18424-2001);
---Deleted the water spray device (see Appendix B of GB/T 18424-2001);
---Deleted the use of blue fabric samples to determine the exposure level (see Appendix C of GB/T 18424-2001).
This document is equivalent to ISO 30013.2011 "Laboratory light source exposure test method for rubber and plastic hoses. Color, appearance and other
Determination of changes in physical properties".
This document has made the following minimal editorial changes.
---Normative reference document ISO 7724-3 has been replaced by ISO 11664-4 in.2019 (see 8.2, ISO 30013.2011 Chapter 2
Note 2), this document directly references ISO 11664-4.
Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.
This document is proposed by China Petroleum and Chemical Industry Federation.
This document is under the jurisdiction of the Hose Sub-Technical Committee of the National Rubber and Rubber Products Standardization Technical Committee (SAC/TC35/SC1).
This document was drafted by. Zhongyu Hose Technology Co., Ltd., Suzhou Huarui Rubber and Plastic Technology Co., Ltd., Qingdao Rubber Sixth Hose Co., Ltd.
Division, Jiangsu Xierte Rubber Co., Ltd., Jiangsu Saier Ultra-High Pressure Special Pipe Industry Co., Ltd., Hengshui Baili Rubber Products Co., Ltd., Liaoning
Ningxia Institute of Standardization, Hangzhou Tongyu Industrial Co., Ltd., Sichuan Daohong New Materials Co., Ltd., Shenyang Ziweiheng Testing Equipment Co., Ltd.,
Kunshan Lipu Electronic Rubber Co., Ltd., Kangmingyuan (Guizhou) Technology Development Co., Ltd., Hebei Zhongmei Special Rubber Co., Ltd., Shenyang Rubber
RESEARCH AND DESIGN INSTITUTE LIMITED.
Drafters of this document. Huang Yuzhong, Zhao Qimo, Wang Yongfu, Guo Wenlong, Wu Heshan, Xu Meng, Bian Dongming, Xu Xiaodong, Shao Xiaoyan, Zhou Wugang,
Jiang Haiyang, Liu Yong, Zheng Bin, Zhang Xiaohong, Li Delong, Li Yang, Zhang Bo, Faye Wong, Liu Xiangxue.
The previous versions of this document and the documents it replaces are as follows.
---First published as GB/T 18950-2003 in.2003;
---This is the first revision and is incorporated into GB/T 18424-2001.
Laboratory light source exposure test method for rubber and plastic hoses
Determination of changes in color, appearance and other physical properties
WARNING. Personnel using this document should be familiar with formal laboratory operating procedures. This document is not intended to address issues that may arise from its use
All safety issues. It is the user's responsibility to establish appropriate safety and health procedures and ensure compliance with national regulations.
1 Scope
This document describes the procedures for exposing rubber and plastic hoses to 3 laboratory light sources. xenon arc lamp, fluorescent UV lamp, and open carbon arc lamp.
method.
These methods simulate hoses used in outdoor environments (see Method A for xenon arc lamp exposure, Method A for fluorescent UV lamp exposure, open
For carbon arc lamp exposure, see Type 1 filter) or when used in an indoor environment (xenon arc lamp exposure, see Method B, for fluorescent UV lamp exposure, see Method B
Method B, open carbon arc lamp exposure method (see type 2 filter) exposure conditions.
This document specifies four types of test specimens (two types each for stress-bearing and non-stress-bearing types during exposure). Using 3 kinds of light sources and not
It is not possible to compare results obtained with the same exposure conditions.
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations
For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to
this document.
GB/T 16422.2-2022 Plastic laboratory light source exposure test methods Part 2.Xenon arc lamp (ISI4892-2.2013,
IDT)
GB/T 16422.3-2014 Plastic laboratory light source exposure test methods Part 3.Fluorescent ultraviolet lamp (ISO 4892-3.
2006,IDT)
GB/T 16422.4-2014 Plastic laboratory light source exposure test methods Part 4.Open carbon arc lamp (ISO 4892-4.
2004,IDT)
GB/T 24134-2009 Evaluation of ozone resistance of rubber and plastic hoses under static conditions (ISO 7326.2006, IDT)
ISO 105-A02 Textiles Color Fastness Test Part A02.Gray Sample Card for Evaluating Discoloration (Textiles-Testsforcolour
Note. GB/T 250-2008 Gray sample card for evaluating discoloration in textile color fastness testing (ISO 105-A02.1993, IDT)
ditioningandtesting)
Note. GB/T 2918-2018 Standard environment for conditioning and testing of plastic specimens (ISO 291.2008, MOD)
ISO 4582 Determination of color changes and changes in properties of plastics after exposure to sunlight through glass, natural weathering or laboratory light sources
Note. GB/T 15596-2021 Determination of color and performance changes of plastics after exposure to solar radiation, natural climate or laboratory radiation sources after glass filtration
(ISO 4582.2017,IDT)
weathering)
Note. GB/T 3511-2018 Weathering resistance of vulcanized rubber or thermoplastic rubber (ISO 4665.2016, IDT)
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