Galvanized Steel Stranded Wire (YB / T5004-1993)
In 1993, China adopted the Galvanized Steel Stranded Wire (YB / T5004-1993) standard for the production of galvanized steel stranded wires, and no further modifications of the standard have been made since. This standard is a comprehensive outline on the specifications and manufacturing requirements for galvanized steel stranded wire. The scope of application of the standard is the treatment of copper clad steel, copper clad steel and steel core galvanized steel wire and its word-type products with a nominal cross-section area of 0.3 mm2 and above. This standard provides one of the primary requirements for the production and quality control of galvanized steel stranded wires.
The standard divides the galvanized steel stranded wires into two types according to the structure, namely bare wire and cable. The structure and performance requirements, test methods and inspection rules of the two types of wires and cables are also different. The standard has detailed regulations on the allowable variation range of the parameters such as the outer diameter and number of layers of the galvanized steel stranded wires, pitch and eccentricity of the strands, etc. In the quality inspection of the galvanized steel stranded wires, the allowable variation range of parameters should be taken into account. If any of the values exceed the range, it should be rechecked until the test results pass.
In addition, the quality requirements for galvanized steel stranded wires should also meet the requirements of relevant national standards. For example, the allowable steel core loss rate of the elliptic wires should meet the requirements of the code. At the same time, the physical and mechanical properties of the galvanized steel stranded wires should also meet the requirements of the relevant regulations. Therefore, it is necessary to perform physical and mechanical tests on the galvanized steel stranded wires in the process of quality inspection and use.
In summary, the standard of Galvanized Steel Stranded Wire (YB / T5004-1993) has comprehensive regulations on the specifications and manufacturing requirements of galvanized steel stranded wire. At the same time, the quality requirements of the galvanized steel stranded wire should also meet the requirements of relevant national standards. Only when the galvanized steel stranded wire meets the requirements of the standard and the relevant national standards can it be used safely and stably.
