GB26722-2024
Steel wire ropes for ropeway
索道用钢丝绳
GB 26722-2024 is a current mandatory Chinese national standard for Steel wire ropes for ropeway. It appears in the Electronics compliance cluster with a product safety focus and has an implementation date of Sep 25, 2024.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard specifies the classification, ordering content, materials, technical requirements, testing methods, and acceptance criteria for steel wire ropes for ropeways. It applies to round strand, compacted strand, shaped strand, and full locked coil wire ropes used in surface lifts, ground cable cars, and passenger/freight aerial ropeways. Manufacturers supplying wire ropes for ropeway applications in China must comply with this standard. It replaces GB/T 26722-2022 and introduces new structures like 6×49SWS and 6×55SWS.
Technical requirements
The standard details comprehensive technical requirements for ropeway wire ropes, focusing on structural integrity and mechanical performance. It specifies the requirements for stranding and laying quality, ensuring uniformity and preventing issues like loosening or wavy deformation under free or wound conditions. The ropes must meet strict diameter tolerance and out-of-roundness limits to ensure proper fit and function in ropeway systems. Material specifications are rigorously defined, covering the surface condition and nominal tensile strength grades of wires used in different rope types (e.g., 1770, 1870, 1960 MPa). The standard also mandates specific properties for rope cores, including fiber cores, solid polymer cores, and composite steel cores, requiring them to be impregnated with anti-corrosion lubricants. Wire coating requirements (B, AB, A grades) are specified based on the rope's application environment. Key mechanical performance metrics include minimum breaking force, permanent elongation rate (not exceeding 0.3% for specific applications), and the mechanical properties of individual wires after dismantling. The standard sets minimum thresholds for tensile strength, reverse bending cycles, and torsion tests, categorized by wire diameter and strength grade. These requirements ensure the rope's durability and safety under dynamic loads.
Testing methods
Testing procedures include measuring rope diameter and out-of-roundness using specific caliper methods, determining breaking force according to GB/T 8358, and assessing permanent elongation. Individual wire tests cover tensile strength (GB/T 228.1), reverse bending (GB/T 238), torsion (GB/T 239.1), and zinc coating weight (GB/T 1839). Strict sampling and re-testing rules are defined to ensure batch consistency and compliance.
FAQs
What products are regulated under GB 26722-2024?
GB 26722-2024 regulates steel wire ropes for ropeways, including round strand, compacted strand, shaped strand, and full locked coil ropes used in surface lifts, ground cable cars, and passenger/freight aerial ropeways.
Are there any updates from the previous version of GB 26722-2024?
Yes, compared to GB/T 26722-2022, the 2024 version adds four new typical rope structures (6×49SWS, 6×55SWS, 6×K49SWS, 6×K55SWS), changes diameter ranges for certain structures, and removes requirements for elastic modulus and related test methods.
What are the key mechanical testing requirements for the wire ropes?
Key tests include minimum breaking force, permanent elongation rate, and dismantled wire tests for tensile strength, reverse bending, torsion, and coating weight. Specific minimum values depend on the rope's structure, diameter, and strength grade.
The summary above provides a high-level overview of GB 26722-2024. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 26722-2024 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Product
- CCS
- H 49
- ICS
- 77.140.65
- Competent department
- Ministry of Industry and Information Technology
- Technical committee
- National Technical Committee on Steel of Standardization Administration of China
Relationships
Replaces:GB/T 26722-2022