GB/T 12756-2018 in English
VALIDZinc-coated steel wire ropes for high-pressure rubber hose
- Issued on:-
- Implemented on:2019-02-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$127.00
《GB/T 12756-2018高压胶管用镀锌钢丝绳》由TC183（全国钢标准化技术委员会）归口，TC183SC12（全国钢标准化技术委员会钢丝绳分会）执行，主管部门为中国钢铁工业协会。
Introduction
1. Standard Overview
GB/T 12756-2018 "Galvanized Steel Wire Rope for High-Pressure Hose" standard completely replaces the old standard of 1991 edition. This standard is mainly applicable to galvanized steel wire rope used as high-pressure hose skeleton reinforcement material, and can also be used as a basis for the selection of other rubber hose, plastic pipe and composite pipe reinforcement materials.
2. Background of Standard Formulation and Analysis of Technical Evolution
With the development of industrial technology, the application scenarios of high-pressure hoses are becoming more and more extensive, and the performance requirements for steel wire ropes are also constantly improving. Compared with the 1991 edition of the standard, GB/T 12756-2018 has been optimized mainly in the following aspects:
- Increased tensile strength level: Four new tensile strength levels have been added, namely 1960 MPa, 2060 MPa, 2160 MPa and 2260 MPa.
- Expanded the wire rope diameter range: expanded from the original range of 1.0 mm to 5.0 mm to meet a wider range of application needs.
- Optimized test methods and requirements: Modified the determination methods of key indicators such as zinc layer weight, torsion times, and breaking elongation.
3. Standard framework comparison table
| Project | 1991 Edition | 2018 Edition |
|---|---|---|
| Tensile strength level (MPa) | Unspecified | 1860, 1960, 2060, 2160, 2260 |
| Wire rope diameter range (mm) | Unspecified | 1.0~5.0 |
| Zinc layer weight requirement (g/m²) | 30d | Minimum zinc layer weight is 30d |
4. Implementation Suggestions
In actual applications, the following factors should be considered when choosing a suitable wire rope:
- Clear usage scenarios: Choose a wire rope with a suitable tensile strength level according to the working environment and pressure requirements.
- Strict testing process: Ensure that the mechanical properties, surface quality and zinc layer thickness of the wire rope meet the standard requirements.
- Optimize storage conditions: Avoid moisture and rust on the wire rope. It is recommended to store it in a dry and ventilated environment.
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