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GB/T 31235-2024: Technical specification for fittings of ±800 kV DC overhead transmission line
Status: Valid GB/T 31235: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 31235-2024 | English | 279 |
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Technical specification for fittings of ±800 kV DC overhead transmission line
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GB/T 31235-2024
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| GB/T 31235-2014 | English | 259 |
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Technical specification for fittings of ±800kV DC overhead transmission line
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GB/T 31235-2014
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PDF similar to GB/T 31235-2024
Basic data | Standard ID | GB/T 31235-2024 (GB/T31235-2024) | | Description (Translated English) | Technical specification for fittings of ��800 kV DC overhead transmission line | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K47 | | Classification of International Standard | 29.240.20 | | Word Count Estimation | 14,196 | | Date of Issue | 2024-12-31 | | Date of Implementation | 2025-07-01 | | Older Standard (superseded by this standard) | GB/T 31235-2014 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 31235-2024: Technical specification for fittings of ±800 kV DC overhead transmission line---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 29.240.20
CCSK47
National Standard of the People's Republic of China
Replaces GB/T 31235-2014
±800kV DC transmission line hardware technical specifications
Released on 2024-12-31
2025-07-01 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 2
4 General requirements 2
5 Technical Requirements 2
6 Test methods and judgment criteria 6
7 Requirements for signs and accompanying documents 6
8 Packaging requirements 6
Appendix A (Normative) Corona and radio interference test methods 8
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/T 31235-2014 "Technical Specification for ±800kV DC Transmission Line Fittings" and GB/T 31235-2014
Compared with the previous version, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) Added a chapter on “Terms and Definitions” (see Chapter 3);
b) Added the manufacturing process and rubber requirements for spacer bars (see 5.1);
c) Changed the spacer flexibility and clamp parameter requirements (see 5.1, 4.1 of the.2014 edition);
d) Added the manufacturing process requirements for suspension clamps (see 5.2);
e) The key dimensions and material performance requirements for tension clamps and joint fittings have been changed (see 5.3, 4.3 of the.2014 edition);
f) The requirements for the manufacturing process of connection fittings such as U-shaped hanging rings and right-angle hanging plates have been changed (see 5.5, 4.5 of the.2014 edition);
g) Added the recommended material and material performance requirements for connection fittings in low temperature operating environments (see 5.5);
h) Added the requirements for pre-twisted wires of pre-twisted anti-vibration hammers (see 5.7);
i) The material properties requirements for steel strands have been changed (see 5.7, 4.7 of the.2014 edition);
j) Deleted Table 3 “Items and quantities of ±800kV DC line fittings test” (see Chapter 7 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 was proposed by the China Electricity Council.
This standard is under the jurisdiction of the National Technical Committee for Standardization of High Voltage Direct Current Transmission Engineering (SAC/TC324).
This document was drafted by. China Electric Power Research Institute Co., Ltd., State Grid Jiangsu Electric Power Co., Ltd., State Grid Corporation of China,
China Power Construction Group Chengdu Electric Hardware Co., Ltd., China Energy Construction Group Nanjing Line Equipment Co., Ltd., China Power Construction Group Siping Line
Road Equipment Co., Ltd., China Energy Engineering Group Anhui Electric Power Design Institute Co., Ltd., Shandong Electric Power Engineering Consulting Institute Co., Ltd., Huzhou
Tailun Electric Power Equipment Co., Ltd., Jiangdong Hardware Equipment Co., Ltd., Xi'an Chuangyuan Electric Power Hardware Co., Ltd., Jiangsu Jiekai Electric Power Equipment Co., Ltd.
Company, Jiangsu Tiannan Electric Power Co., Ltd., Zhejiang Taichang Industrial Co., Ltd., Shanghai Yonggu Electric Power Equipment Co., Ltd., China Southern Power Grid
Nanning Branch of Ultra-high Voltage Transmission Company Limited, China Southern Power Grid Digital Grid Group Co., Ltd., Jiangsu Shuanghui Electric Power Development Co., Ltd.
Co., Ltd., Pinggao Group Co., Ltd., China Power Construction Group Henan Electric Power Equipment Co., Ltd., and Liaoning Jinxing Electric Power Hardware Technology Co., Ltd.
The main drafters of this document are. Zhou Lixian, Si Jiajun, Zhao Jiangtao, Liu Shengchun, Mao Yan, Cheng Shuyi, Gu Chen, Tan Li, Wang Shengqiang, Du Yijun,
Zhang Jian, Su Jian, He Ning'an, Chen Haomin, Niu Haijun, Cao Maofeng, Xian Li, Wang Huiping, Wang Hong, Han Zhuping, Zhao Yutian, Chen Guohua, Mao Xinguo,
Wu Caihong, Liu Zhen, Yan Jun, Zhu Xiaoqiang, Wang Enjiu, Zheng Lefei.
The previous versions of this document and the documents it replaces are as follows.
---First published in.2014 as GB/T 31235-2014;
---This is the first revision.
±800kV DC transmission line hardware technical specifications
1 Scope
This document specifies the general requirements, technical requirements, judgment criteria, markings and accompanying documents for ±800kV DC overhead transmission line fittings.
The requirements for parts and packaging are described, and the corresponding test methods are described.
This document applies to the design, manufacture, testing, and acceptance of ±800kV DC overhead transmission line hardware.
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/T 93 standard spring washers
GB/T 95 Flat Washers Grade C
GB/T 229 Charpy pendulum impact test method for metallic materials
GB/T 699 High-quality carbon structural steel
GB/T 700 Carbon structural steel
GB/T 1173 Cast aluminum alloys
GB/T 2314 General technical requirements for power fittings
GB/T 2315 Nominal breaking load series and connection type dimensions of power fittings
GB/T 2317.4 Test methods for electrical fittings Part 4.Acceptance rules
GB/T 3190 Chemical composition of wrought aluminum and aluminum alloys
GB/T 3880 (all parts) Aluminium and aluminium alloy plates and strips for general industrial use
GB/T 4437.1 Aluminium and aluminium alloy hot extruded tubes Part 1.Seamless round tubes
GB/T 5075 Terminology of electrical fittings
DL/T 284 Hot-dip galvanized bolts and nuts for transmission line towers and power fittings
DL/T 683 Model naming method for power fittings
DL/T 756 Suspension Clamp
DL/T 757 Strain Clamp
DL/T 758 Connecting fittings
DL/T 759 Connecting fittings
DL/T 760.3 Voltage-equalizing rings, shielding rings and voltage-equalizing shielding rings
DL/T 763 Technical requirements for pre-twisted fittings for overhead lines
DL/T 764 Hexagonal head bolts with pin holes for electric power fittings
DL/T 768.2 Manufacturing quality of electrical fittings Part 2.Ferrous metal forgings
DL/T 768.3 Manufacturing quality of electrical fittings Part 3.Stampings
DL/T 768.5 Manufacturing quality of electrical fittings Part 5.Aluminum parts
DL/T 768.6 Manufacturing quality of electrical fittings Part 6.Welded parts and thermally cut parts
DL/T 768.7 Hot dip galvanized coating of steel parts for manufacturing quality of electric power fittings
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