GB/T 5973-2026 Lifting appliances—Termination sockets for steel wire ropes English, Anglais, Englisch, Inglés, えいご
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ICS 13.220.10
CCS H 57
National Standard of the People's Republic of China
GB/T 5973-2026
Replaces GB/T 5973-2006
Lifting appliances - Termination sockets for steel wire ropes
起重机械 钢丝绳绳端固接接头
Issue date: 2026-01-28 Implementation date: 2027-02-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Types
5 Basic Parameters
6 Technical Requirements
7 Test Methods
8 Inspection Rules
9 Marking, Packaging, Transportation, and Storage
Appendix A (Informative) Recommendations for the Safe Use of Wedge Sockets
Rope End Terminations for Steel Wire Ropes of Lifting Appliances
1 Scope
This document specifies the types, basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation, and storage for rope end terminations (sockets) for steel wire ropes.
This document applies to terminations for round strand steel wire ropes with a strength grade not greater than 1960 MPa, used on various types of lifting appliances, conforming to the specifications of GB/T 8918, GB/T 20118, GB/T 20067, and YB/T 5359. Other types of rope end terminations may refer to this document for use.
2 Normative References
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 2828.1 Sampling procedures for inspection by attributes – Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 4162-2022 Ultrasonic testing method for forged and rolled steel bars
GB/T 5976 Wire rope grips
GB/T 6402-2024 Methods for ultrasonic testing of steel forgings
GB/T 7233.1-2023 Steel castings – Ultrasonic testing – Part 1: Steel castings for general purposes
GB/T 8918 Steel wire ropes for important purposes
GB/T 9443-2019 Penetrant testing for steel and iron castings
GB/T 9444-2019 Magnetic particle testing for steel and iron castings
GB/T 9799 Metallic and other inorganic coatings – Electroplated coatings of zinc on iron or steel with supplementary treatments
GB/T 11352 Carbon steel castings for general engineering purposes
GB/T 13384 General specifications for packaging of mechanical and electrical products
GB/T 13912 Metallic coatings – Hot-dip galvanized coatings on fabricated iron and steel articles – Specifications and test methods
GB/T 14408 Low alloy steel castings for general engineering and structural purposes
GB/T 16825.1 Metallic materials – Verification and calibration of static uniaxial testing machines – Part 1: Verification and calibration of the force-measuring system for tension and/or compression testing machines
GB/T 17107 Steel grades and mechanical properties for structural forgings
GB/T 20067 Coarse diameter steel wire ropes
GB/T 20118 Steel wire ropes – General requirements
GB/T 30588 Terminations for steel wire ropes – Alloy cast sockets
GB/T 33084 Heavy alloy structural steel forgings – Technical specification
GB/T 37400.15-2019 Heavy mechanical general technical specification – Part 15: Nondestructive testing of steel forgings
JB/T 6402 Heavy low alloy steel castings – Technical specification
YB/T 4615 Resin socketing for steel wire rope ends
YB/T 5359 Compacted strand wire ropes
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
wedge socket
A connector consisting of a socket body, a wedge, and a pin, used to clamp and securely attach the end of a steel wire rope to a specific structure (e.g., engineering component).
3.2
poured socket
A connector that securely attaches the end of a steel wire rope to a specific structure (e.g., engineering component) by means of a pouring (casting) process using metal or resin.
3.3
open poured socket
A poured socket where the end connection is of the pin type.
3.4
closed poured socket
A poured socket with a naturally closed end, where the closed part is flat in shape.
4 Types
4.1 Classification of Types
Rope end terminations for steel wire ropes are classified into wedge sockets and poured sockets.
Poured sockets can be further classified into open poured sockets and closed poured sockets based on structural type; they can also be classified into cast sockets and forged sockets based on the manufacturing process.
4.2 Designation
The designation for a wedge socket consists of the capitalized initial letters of the Chinese Pinyin for "wedge" and "head": "XT".
The designation for a poured socket consists of the capitalized initial letters of the Chinese Pinyin for "open" and "head" ("KT") or "closed" and "head" ("BT"), followed by the capitalized initial letter of the Chinese Pinyin for the forming process: "Z" for casting (Zhu) or "D" for forging (Duan).
Note: "Forging" refers to die forging, open die forging, or a combination of forging and machining.
4.3 Model Marking
The marking is indicated by the termination designation and the applicable maximum nominal diameter of the steel wire rope.
Example 1: Model marking for a wedge socket suitable for a maximum steel wire rope diameter of 18 mm is: XT 18.
Example 2: Model marking for an open forged poured socket suitable for a maximum steel wire rope diameter of 18 mm is: KTD 18.
Example 3: Model marking for a closed cast poured socket suitable for a maximum steel wire rope diameter of 40 mm is: BTZ 40.
5 Basic Parameters
5.1 The minimum breaking force of wedge sockets shall comply with the requirements in Table 1. The basic dimensions should follow the specifications in Table 1, with typical schematic shown in Figure 1. If the minimum breaking force falls outside the range specified in Table 1, it shall be subject to agreement between the supplier and the purchaser.
5.2 The minimum breaking force of open poured sockets shall comply with the requirements in Table 2. The basic dimensions should follow the specifications in Table 2, with typical schematic shown in Figure 2. If the minimum breaking force falls outside the range specified in Table 2, it shall be subject to agreement between the supplier and the purchaser.
5.3 The minimum breaking force of closed poured sockets shall comply with the requirements in Table 3. The basic dimensions should follow the specifications in Table 3, with typical schematic shown in Figure 3. If the minimum breaking force falls outside the range specified in Table 3, it shall be subject to agreement between the supplier and the purchaser.
6 Technical Requirements
6.1 Technical Requirements for Castings
