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GB/T 25025-2025: Technical requirements for glass-lined equipment
Status: Valid GB/T 25025: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 25025-2025 | English | 439 |
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Technical requirements for glass-lined equipment
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GB/T 25025-2025
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| GB 25025-2010 | English | 489 |
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Specification of glass-lined equipment for industry
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GB 25025-2010
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PDF similar to GB/T 25025-2025
Basic data | Standard ID | GB/T 25025-2025 (GB/T25025-2025) | | Description (Translated English) | Technical requirements for glass-lined equipment | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G94 | | Classification of International Standard | 71.120; 25.220.50 | | Word Count Estimation | 22,254 | | Date of Issue | 2025-03-28 | | Date of Implementation | 10/1/2025 | | Older Standard (superseded by this standard) | GB 25025-2010 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 25025-2025: Technical requirements for glass-lined equipment---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 71.120;25.220.50
CCSG94
National Standard of the People's Republic of China
Replaces GB 25025-2010
Technical conditions for glass-lined equipment
Released on 2025-03-28
2025-10-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Basic Requirements 4
5 Design 4
6 Materials 5
7 Manufacturing 6
8 Quality requirements for finished glass-lined parts 8
9 Detection Methods13
10 Nameplate 14
11 Factory Documents 14
12 Packaging and transportation 14
13 Return to factory for re-enameling 14
Appendix A (Normative) Simulated glass lining process heating test method 16
Appendix B (Normative) Test method for rapid temperature change resistance of glass-lined equipment 17
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 for standardization documents"
Drafting.
This document replaces GB 25025-2010 "Technical Specifications for Glass-lined Equipment". Compared with GB 25025-2010, except for structural adjustments and editing
In addition to the changes in performance, the main technical changes are as follows.
a) The applicable range of design temperature has been changed (see Chapter 1, Chapter 1 of the.2010 edition);
b) Changed the terms "glass lining layer", "firing", "re-enamelling", "crack", "scratch, abrasion", "color difference point", "powder tumor", "repair", and "firing mark"
and definitions, adding "local under-firing", "return to factory for re-enamelling", "line pattern", "stress line", "turtle back pattern", "orange peel-like bumps", "unevenness", "structure"
The terms and definitions of "strongly corrosive medium" and "weakly corrosive medium" have been revised (see Chapter 3,
Chapter 3 of the.2010 edition);
c) The provisions on the classification and code of glass-lined equipment have been deleted (see Chapter 4 of the.2010 edition);
d) Added basic requirements (see Chapter 4);
e) The regulations on the design of glass-lined equipment and its components and accessories have been changed (see Chapter 5, Chapter 5 of the.2010 edition);
f) The provisions for glass-lined equipment and its components and accessories have been changed (see Chapter 6, Chapter 6 of the.2010 edition);
g) The provisions for the manufacture, inspection and acceptance of the metal substrate of glass-lined parts have been changed (see 7.1, Chapter 7 of the.2010 edition);
h) The requirements for the glass-lined process have been changed (see 7.2, Chapter 8 of the.2010 edition);
i) The quality requirements for finished glass-lined parts have been changed (see Chapter 8, Chapter 9 of the.2010 edition);
j) Modified the provisions on the inspection methods for glass-lined equipment, glass-lined components and pipe fittings (see Chapter 9,.2010 Edition).
Chapter 10);
k) The provisions for assembly of glass-lined equipment have been deleted (see Chapter 11 of the.2010 edition);
l) Added the requirements for the nameplate installation position and height when the glass-lined equipment has an insulation layer (see 10.1);
m) Some contents have been added to the product manual (see 11.2);
n) Added requirements for glass-lined equipment to be returned to the factory for re-lining (see Chapter 13).
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 for Standardization of Glass-lined Equipment (SAC/TC72).
This document was drafted by. Zibo Taiji Industrial Enamel Co., Ltd., Jiangsu Yangyang Chemical Equipment Manufacturing Co., Ltd., Ningbo Special Equipment
Inspection Institute, Beijing Huateng Datang Equipment Co., Ltd., Hangzhou Special Equipment Inspection Science Institute (Hangzhou Special Equipment Emergency Disposal
Center), Jiangsu Runchi Intelligent Manufacturing Equipment Technology Co., Ltd., Linyi Hongye Chemical Equipment Co., Ltd., Shandong Huaxing Special Equipment Co., Ltd.,
Jiangsu Xieli Equipment Technology Co., Ltd., Guizhou Special Equipment Inspection and Testing Institute, Nanjing Zhengyuan Enamel Equipment Manufacturing Co., Ltd., Zibo Baote
Chemical Technology Co., Ltd., Changshu Huamao Chemical Equipment Co., Ltd., Wuxi Qianqiao Chemical Machinery Co., Ltd., Changshu Nanhu Chemical Equipment
Equipment Manufacturing Co., Ltd., Zibo Santian Chemical Equipment Co., Ltd., Jiangyin Guipu Enamel Co., Ltd., Sichuan Special Equipment Inspection Co., Ltd.
Institute, Taizhou Special Equipment Inspection and Testing Institute, Chongqing Special Equipment Inspection and Testing Institute, Henan Boiler and Pressure Vessel Inspection Technology
Scientific Research Institute, Tianhua Chemical Machinery and Automation Research and Design Institute Co., Ltd.
The main drafters of this document are. Sang Linchun, Fu Guangsheng, Xu Bo, Qian Jianfeng, Zhu Hongzhi, Gao Jianqing, Du Qing, Xu Guoping, Mo Weixian, Shao Changquan,
Xiao Shuai, Jin Sheng, Chen Xiaobing, Huo Shihong, Zhou Ke, Hu Xin'an, He Zhengwen, Zhang Cheng, Huang Chundong, Chen Hongmei, Hu Xiaoyan, Xie Fang, Ma Gang, Huang Song, Zhang Shuancheng,
Mao Guojun, Chen Haiyun, Gu Shuyang, Zhang Sheng, Xiong Shutao, Zheng Yingfeng, Niu Yaping, Chai Junhui, Lan Zhongxiang, Xiao Lijuan.
The previous versions of this document and the documents it replaces are as follows.
---First published in.2010 as GB 25025-2010;
---This is the first revision.
Technical conditions for glass-lined equipment
1 Scope
This document specifies the basic requirements, design and
The design, materials, manufacturing, quality requirements and re-enamelling are described, and the corresponding inspection methods are described.
This document is applicable to glass-lined equipment for petrochemical production with a design temperature greater than or equal to -20°C and less than or equal to.200°C (including
Including glass-lined parts of glass-lined equipment and glass-lined pipes and fittings).
2 Normative references
The contents of the following documents constitute 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/T 7989 Determination of corrosion resistance of glass-lined glaze to boiling acid and its vapor
GB/T 7991.1 Test methods for glass-lined coatings Part 1.Determination of corrosion resistance to alkaline solutions
GB/T 7991.3 Test methods for glass-lined layers Part 3.Determination of resistance to sudden temperature changes
GB/T 7991.4 Test methods for glass-lined layers Part 4.Determination of mechanical impact resistance
GB/T 7991.5 Test methods for glass-lined layers Part 5.Measurement of thickness by electromagnetic method
GB/T 7991.6 Test methods for glass-lined layers Part 6.High voltage test
GB/T 7994.1 Test methods for glass-lined equipment Part 1.Hydrostatic test
GB/T 7994.2 Test methods for glass-lined equipment Part 2.Air tightness test
GB/T 8923.1 Surface preparation of steel before coating - Visual assessment of surface cleanliness - Part 1.Uncoated steel
Rust level and treatment level of steel surface after surface and complete removal of existing coatings
GB/T 9439 Grey iron castings
GB/T 12229-2005 Technical requirements for carbon steel castings for general valves
HG/T 2377 Determination of the corrosion resistance of glass-lined layer to boiling water and water vapor
HG/T 2637 Testing methods for geometric dimensions of glass-lined parts
HG/T 3105 Preparation of steel plate glass-lined test pieces
NB/T 47008 Carbon steel and alloy steel forgings for pressure equipment
NB/T 47009 Alloy steel forgings for low temperature pressure equipment
NB/T 47013.4 Nondestructive testing of pressure equipment Part 4.Magnetic particle testing
NB/T 47013.5 Nondestructive testing of pressure equipment Part 5.Penetrant testing
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Glass-lined
The glassy glaze sprayed on the metal substrate is compounded through multiple high-temperature firings to form a smooth, dense, and continuous glassy glaze on the metal substrate.
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