GB/T 39717-2020 in English
VALIDCeramic flat membrane for water treatment
- Issued on:2020-12-14
- Implemented on:2021-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
《GB/T 39717-2020水处理用陶瓷膜板》由TC194（全国工业陶瓷标准化技术委员会）归口，主管部门为中国建筑材料联合会。
Introduction
Analysis of standard technical framework
| Technical dimensions | GB/T39717-2020 requirements | Industry comparison benchmark |
|---|---|---|
| Aperture accuracy | 0.04-0.55μm graded control | ±15% pore size deviation |
| Mechanical strength | ≥30MPa bending strength | Ordinary ceramics 20MPa |
| Corrosion resistance | 20% sulfuric acid boiling for 1h strength retention ≥20MPa | Conventional materials drop by 40% |
Detailed explanation of core parameters
The standard divides ceramic membrane plates into 4 categories according to the nominal pore size: M0.05/M0.1/M0.2/M0.5, and requires that the average pore size deviation be controlled within ±20%. Among them, the M0.1 type membrane plate must meet the following requirements:
- Aperture range: 0.13-0.17μm
- Maximum pore size ≤0.25μm
- Pure water flux ≥0.5m³/(m²·h)
Material performance requirements
Taking alumina ceramic membrane plate as an example, the standard stipulates that after acid and alkali corrosion test:
- The Mohs hardness of the membrane layer remains ≥4
- Bending strength retention rate＞66%
- No visible dissolution phenomenon on the surface
Test method specifications
The standard adopts the bubble point method (GB/T32361) to determine the membrane pore size, and the test conditions require:
| Test Items | Method Standard | Key Parameters |
|---|---|---|
| Pure Water Flux | Appendix A | 25±1℃,40kPa Pressure Difference |
| Flexural Strength | GB/T1965 | 120×30mm Sample |
Implementation Suggestions
Based on the standard requirements, it is recommended that the production process pay attention to the following:
- Sintering process controls pore size distribution
- Use sandwich structure to enhance mechanical strength
- Type inspection is carried out on every 1000m² batch
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