Standard Briefing:Stadard ID: GB/T 5843-2025
Stadard Title: Flange coupling
Price (USD): 359
Lead day (Deliver True-PDF English version): 4 days [Need to translate]
Status: ValidEvolution and Historical Versions:
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 5843-2025 | English | 359 |
Add to Cart
|
4 days [Need to translate]
|
Flange coupling
| Valid |
GB/T 5843-2025
|
| GB/T 5843-2003 | English | 189 |
Add to Cart
|
3 days [Need to translate]
|
Flange coupling
| Valid |
GB/T 5843-2003
|
| GB/T 5843-1986 | English | 279 |
Add to Cart
|
3 days [Need to translate]
|
Flanged coupling
| Obsolete |
GB/T 5843-1986
|
PDF Samples:
Basic Data: | Standard ID | GB/T 5843-2025 (GB/T5843-2025) | | Description (Translated English) | Flange coupling | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J19 | | Classification of International Standard | 21.120.20 | | Word Count Estimation | 18,132 | | Date of Issue | 2025-03-28 | | Date of Implementation | 2025-10-01 | | Older Standard (superseded by this standard) | GB/T 5843-2003 | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | Contents, Scope, and Excerpt:GB/T 5843-2025.Flange coupling
GB/T 5843-2025 English version. Flange coupling
ICS 21.120.20
CCSJ19
National Standard of the People's Republic of China
Replace GB/T 5843-2003
Flange coupling
Released on 2025-03-28
2025-10-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of ContentsPreface III
1 Range 1
2 Normative references 1
3 Terms and Definitions 1
4 Type and marking 1
5 Basic parameters and main dimensions 5
6 Technical Requirements11
7 Test methods 11
8 Inspection Rules 12
9 Marking, packaging, transportation and storage 12
Reference 13
ForewordThis 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 5843-2003 "Flange Couplings". Compared with GB/T 5843-2003, except for structural adjustments and editorial changes,
In addition to the above, the main technical changes are as follows.
a) The J1-type shaft hole of the GY-type flange coupling has been deleted (see Figure 1 and Table 1 of the.2003 edition);
b) The J1-type shaft hole of the GYS flange coupling has been deleted (see Figure 2 and Table 1 of the.2003 edition);
c) The J1-type shaft hole of the GYH flange coupling has been deleted (see Figure 3 and Table 1 of the.2003 edition);
d) The nominal torque values of flange couplings have been changed (see Chapter 1 and Table 1, Table 1 of the.2003 edition);
e) The marking method of flange couplings has been changed (see 4.2, 3.2 of the.2003 edition);
f) Changed the rotation diameter D of flange couplings of GY110 (formerly GY4), GYS110 (formerly GYS4), GYH110 (formerly GYH4)
The value of (see Table 1, Table 1 of the.2003 edition);
g) Added some shaft hole diameter specifications (see Table 1);
h) Added the tolerance zone code for the flange coupling shaft hole diameter (see Table 1);
i) Added relevant parameters of connecting bolt holes (see Table 1);
j) The materials of the half-shaft and the centering ring (GYH type) have been changed (see Table 2, Table 2 of the.2003 edition);
k) Added the bolt tightening torque requirements for flange couplings (see 6.4);
l) Added test methods (see Chapter 7).
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 and coordinated by the National Technical Committee for Standardization of Machine Shafts and Accessories (SAC/TC109).
This document was drafted by. Erzhong (Deyang) Heavy Equipment Co., Ltd., Taiyuan Heavy Industry Co., Ltd., Yanqi Lake Basic Manufacturing Technology Research Institute
Institute (Beijing) Co., Ltd., Hebei Hengtong Transmission Machinery Co., Ltd., Dongfang Electric Group Dongfang Steam Turbine Co., Ltd., China Heavy Machinery
Research Institute Co., Ltd., China Machinery Engineering Institute Group Ningbo Intelligent Machine Tool Research Institute Co., Ltd., Hubei Power Transmission Intelligent Manufacturing Innovation Center
Limited Liability Company, Nanjing Gongnuo Technology Co., Ltd., Hubei Yinguan Axle Co., Ltd., and China Machinery Productivity Promotion Center Co., Ltd.
The main drafters of this document are. Shao Jumin, Gao Lin, Xu Hongyan, Chen Jingyu, Liu Luming, Yin Gang, Liu Yong, Tian Xichen, Huang Lizhao, Liu Yi, Wang Li,
Zhou Peng and Li Quanjun.
This document was first issued in 1986, revised for the first time in.2003, and this is the second revision.
Flange coupling
ScopeThis document specifies the basic parameters, main dimensions and technical requirements of flange couplings, as well as test methods, inspection rules, marking, packaging,
It also defines the types and markings of products.
This document is applicable to the manufacture of flange couplings that transmit nominal torques of 80 N·m to 180000 N·m.
Normative ReferencesThe 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 27 Hexagonal head reinforcement bolts
GB/T 191 Pictorial markings for packaging, storage and transportation
GB/T 699-2015 High-quality carbon structural steel
GB/T 1800.1-2020 Product Geometrical Technical Specification (GPS) Linear Dimension Tolerance ISO Code System Part 1.Tolerances,
The basis of deviation and fit
GB/T 1800.2-2020 Geometrical Product Specifications (GPS) Linear Dimension Tolerances ISO Code System Part 2.Standards
Tolerance zone codes and limit deviation tables for holes and shafts
GB/T 3098.1-2010 Mechanical properties of fasteners Bolts, screws and studs
GB/T 3098.2-2015 Mechanical properties of fasteners - Nuts
GB/T 3852-2017 Coupling shaft hole and connection type and size
GB/T 3931 Coupling Terminology
GB/T 4879 Rust-proof Packaging
GB/T 5782 Hexagon head bolts
GB/T 6388 Shipping and receiving marks for transport packaging
GB/T 12458-2017 Coupling Classification
GB/T 13384 General technical requirements for packaging of electromechanical products
Terms and DefinitionsThe terms and definitions defined in GB/T 3931 apply to this document.
4 Type and marking
4.1 Type
According to the classification rules defined in GB/T 12458-2017, the types of flange couplings are divided into.
--- Basic type (see Figure 1), type code "GY";
--- Centering tenon type (see Figure 2), type code "GYS";
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