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GB/T 31293-2025: Vacuum resin infusion molding epoxy for wind blade
Status: Valid GB/T 31293: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 31293-2025 | English | 289 |
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Vacuum resin infusion molding epoxy for wind blade
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GB/T 31293-2025
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| GB/T 31293-2014 | English | 229 |
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Vacuum resin infusion molding epoxy for wind blade
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GB/T 31293-2014
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PDF similar to GB/T 31293-2025
Basic data | Standard ID | GB/T 31293-2025 (GB/T31293-2025) | | Description (Translated English) | Vacuum resin infusion molding epoxy for wind blade | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Q23 | | Classification of International Standard | 83.120 | | Word Count Estimation | 14,195 | | Date of Issue | 2025-06-30 | | Date of Implementation | 2026-01-01 | | Older Standard (superseded by this standard) | GB/T 31293-2014 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 31293-2025: Vacuum resin infusion molding epoxy for wind blade---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/GBT31293-2025
ICS 83.120
CCSQ23
National Standard of the People's Republic of China
Replaces GB/T 31293-2014
Vacuum infusion of epoxy resin for wind turbine blades
Released on June 30, 2025
Implementation on January 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 31293-2014 "Vacuum-infused epoxy resin for wind turbine blades". Compared with GB/T 31293-2014,
In addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) The classification method has been changed (see Chapter 4, Chapter 4 of the.2014 edition);
b) The exothermic peak temperature requirement was changed, the gel time requirement was deleted, and the pot life requirement was added (see 5.2, 5.2 of the.2014 edition);
c) Added requirements for casting density and impact toughness (see 5.3);
d) Added the test method for appearance (see 6.1);
e) The test method for exothermic peak temperature has been changed (see 6.2.6, 6.7 of the.2014 edition);
f) Added the test method for pot life (see 6.2.7);
g) The test method for gel time has been deleted (see 6.6 of the.2014 edition);
h) Added the method for preparing casting specimens (see 6.3.1);
i) Added the test method for casting density (see 6.3.2);
j) The requirements for type inspection cycle have been changed (see 7.2, 7.2 of the.2014 edition);
k) The batching rules have been changed (see 7.4, 7.4 of the.2014 edition);
l) The sampling plan and sampling method have been changed (see 7.5, 7.5 of the.2014 edition);
m) The storage period requirements have been changed (see 8.4.2, 8.4.2 of the.2014 edition).
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 is proposed by China Building Materials Federation.
This document is under the jurisdiction of the National Technical Committee for Standardization of Fiber Reinforced Plastics (SAC/TC39).
This document was drafted by. Sichuan Dongshu New Materials Co., Ltd., Beijing Glass and Steel Institute Testing Center Co., Ltd., Beijing Glass Institute (Tengzhou) Composite Materials Co., Ltd.
Materials Co., Ltd., Zhejiang Wansheng Co., Ltd., Guangdong Mingyang New Energy Materials Technology Co., Ltd., Daosheng Tianhe Materials Technology (Shanghai) Co., Ltd.
Co., Ltd., Huibai New Materials Technology (Shanghai) Co., Ltd., Shanghai Dewei New Energy Materials Co., Ltd., Jiangsu Yangnong Jinhu Chemical
Co., Ltd., Shandong Shangzheng New Materials Technology Co., Ltd., Guangzhou Polymer New Materials Technology Co., Ltd., Beijing Guohua New Materials Technology Co., Ltd.
Technology Research Institute Co., Ltd., Tangshan Yulong New Materials Technology Co., Ltd., Dongfang Electric Wind Power Co., Ltd., Goldwind Science & Technology Co., Ltd.
Co., Ltd., Envision Energy Co., Ltd., Sany Heavy Energy Co., Ltd., Yunda Energy Technology Group Co., Ltd., Sinoma Science & Technology Wind Power Blade Co., Ltd.
Co., Ltd., Sinoma Science & Technology (Jiuquan) Wind Power Blade Co., Ltd., and Zhuzhou Times New Materials Technology Co., Ltd.
The main drafters of this document are. Xiao Yi, Zhou Baineng, Yang Dexu, Yao Yalin, Wang Ping, Zeng Wei, Wang Yanli, Chen Cuiping, Tan Shuiping, Zhang Xiaocun,
Yu Xiaowei, Jian Fangtian, Tan Jun, Xie Yong, Wang Jikang, Wang Yibo, Wu Shuangquan, Li Xiuhai, Yang Senlin, Hao Zhuang, Ma Hao, Guo Jinlei, Zhou Xiaoliang,
Li Chengliang, Lu Jiaqi, Chen Huang, and Mou Shuxiang.
This document was first published in.2014 and this is the first revision.
Vacuum infusion of epoxy resin for wind turbine blades
1 Scope
This document specifies the classification and technical requirements of vacuum-infused epoxy resin for wind turbine blades, describes the test methods and inspection rules, and specifies
Marking, packaging, transportation and storage.
This document applies to the production and inspection of vacuum-infused epoxy resins for wind turbine blades.
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.
GB 190 Dangerous Goods Packaging Marking
GB/T 191 Pictorial markings for packaging, storage and transportation
GB/T 601-2016 Preparation of standard titration solutions for chemical reagents
GB/T 1033.1-2008 Plastics - Determination of density of non-cellular plastics - Part 1.Immersion method, pycnometer method and titration method
GB/T 2035 Plastics Terminology
GB/T 2567-2021 Test method for properties of resin castings
GB/T 3961 Terminology of fiber reinforced plastics
GB/T 4612 Determination of epoxy equivalent of plastic epoxy compounds
GB/T 6488 Determination of refractive index of liquid chemical products
GB/T 6678 General Principles for Sampling of Chemical Products
GB/T 6680-2003 General rules for sampling of liquid chemical products
GB/T 11547 Plastics - Determination of resistance to liquid chemical reagents
GB 18191 Packaging containers - Plastic drums for dangerous goods
GB/T 19466.2 Plastics Differential Scanning Calorimetry (DSC) Part 2.Determination of glass transition temperature
GB/T 22314 Determination of viscosity of epoxy resin plastics
GB/T 24148.9 Plastics Unsaturated polyester resins (UP-R) Part 9.Determination of total volume shrinkage
3 Terms and Definitions
The terms and definitions defined in GB/T 2035 and GB/T 3961 and the following apply to this document.
3.1
In a mold consisting of a rigid half mold and a flexible membrane, the resin is injected into the preform through a preset pipeline using the pressure generated by the vacuum.
A method for preparing a composite product by curing.
3.2
epoxy resin system
A liquid mixture of epoxy resin and curing agent in a formulated ratio.
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