T/SDWCIA 0028-2025 Quality Classification and "Leader" Evaluation Requirements for Galvanized Steel Wires Used in Overhead Cables

Scope

Scope: This document specifies the basic requirements, evaluation indicators, and requirements for product quality grading and enterprise standard levels of galvanized steel wires for overhead conductors, as well as evaluation methods and grade divisions. This document applies to the evaluation of product quality grading and enterprise standard levels of galvanized steel wires for overhead conductors. Relevant institutions can refer to it when conducting quality grading and enterprise standard level evaluations, as well as "leader" product evaluations and related certifications or evaluations. Relevant enterprises can also refer to this document when formulating enterprise standards. Main technical content: 4. Basic requirements 4.1 In the past three years, the enterprise has no major or above-mentioned quality, environmental, or safety accidents. 4.2 The enterprise is not included in the national credit information list of entities with serious trustworthiness violations. 4.3 The enterprise can establish and operate corresponding quality, environmental, and occupational health and safety management systems in accordance with GB/T 19001, GB/T 24001, and GB/T 45001. Encourage enterprises to establish other high-level related management systems based on their own operations; 4.4 The product should be a mass-produced product. Galvanized steel wires for overhead conductors should meet the requirements specified in relevant GB/T 3428, YB/T 5004, and NB/T 10473 standards. 5. Evaluation indicators and requirements 5.1 Classification of evaluation indicators 5.1.1 The evaluation indicator system for galvanized steel wires for overhead conductors includes basic indicators, core indicators, and innovation indicators. 5.1.2 Basic indicators 5.1.2.1 Basic indicators for galvanized steel wires for overhead conductors include surface quality, diameter and deviation, elongation, torsion, coating adhesion, coating uniformity, and aluminum content in zinc-aluminum alloys. 5.1.2.2

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