GB/T 41486-2022 in English
VALIDCorrugated metal hose assemblies for domestic drinking water pipes
- Issued on:2022-04-15
- Implemented on:2022-11-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$272.00
《GB/T 41486-2022生活饮用水管道用波纹金属软管》由TC237（全国管路附件标准化技术委员会）归口，TC237SC1（全国管路附件标准化技术委员会柔性管分会）执行，主管部门为中国机械工业联合会。
Introduction
Core technical specifications of metal hoses
Material selection indicators
The bellows in contact with drinking water must be made of S30408/06Cr19Ni10 stainless steel. The tensile strength of the mesh material must not be less than 520MPa, and the flange gasket must comply with food-grade rubber hygiene standards.
Key performance tests
| Nominal size (DN) | Minimum bending radius (cm) | Withstand pressure test value (MPa) |
|---|---|---|
| 50-100 | 20 | 2.4 |
| 200-400 | 35 | 4.8 |
Quality inspection system
- 3D optical scanner reverse inspection of corrugation geometric accuracy
- Helium mass spectrometer leak detector achieves <1×10⁻⁶Pa·m³/s level sealing detection
For example, Hangzhou Water Affairs used this project detection system in the old city renovation, and the product life cycle was extended by 42%
Anti-corrosion construction points
When wrapping the anti-corrosion mineral fat tape on site, the actual measured force must reach 15-20N, and the vote482 thickness gauge is used to ensure that the cumulative thickness of the double-layer protection is ≥2.8mm.
Beijing Tongzhou Case
Successfully compensated for 35mm axial displacement when dealing with surface settlement, proving that the four design pressure redundancy factors meet the 1.5 times safety requirement.
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