JC/T 1079-2020 in English
VALIDVacuum insulating glass
- Issued on:2020-04-16
- Implemented on:2020-10-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
Price(USD)：
$250.00
$243.00
$243.00
本标准规定了真空玻璃的术语和定义、要求、试验方法、检验规则和包装、标志、运输和贮存。
本标准适用于建筑、家电用真空玻璃，其它用途的真空玻璃可参照使用。
Introduction
Standard Evolution and Core Revisions
| Technical Indicators | 2008 Edition Requirements | 2020 Edition Revisions | Technical Impact |
|---|---|---|---|
| Dimensional Deviation | Specified Separately for Length/Width/Thickness | Integrated into a Unified Tolerance System | Improve Product Interchangeability |
| Thermal Insulation Performance | Only U-value Grading is Specified | Added Heat Flow Meter Method (B.4.1) | Test Accuracy Improved by 30% |
| Durability test | 3 independent tests | Integrated into three-stage continuous test | Closer to the actual use environment |
Analysis of key technical requirements
4.1 Dimension control system
The new standard integrates the tolerance requirements into:
- Length deviation: ≤±2mm (within 2000mm)
- Thickness deviation: ±0.3mm (when D＜10mm)
- Diagonal difference: ≤0.2% average length
Project case:
A curtain wall project uses tempered vacuum glass, special attention should be paid to the cumulative thickness tolerance. It is recommended to reserve a 0.5mm installation gap.
Implementation Suggestions
Selection Guide
| Application Scenario | Recommended Type | U-value Requirements |
|---|---|---|
| Curtain Wall in Severe Cold Areas | Double Low-E Composite Vacuum Glass | ≤0.8W/(m²·K) |
| Urban Residential Exterior Windows | Tempered Vacuum Glass | ≤1.2W/(m²·K) |
Acceptance Points
- Thermal Transfer Coefficient Change Rate after Durability Test≤10%
- Support density ≤ 3 pieces/m²
- Appearance scratch length ≤ 100mm
Sample only — not a preview of JC/T 1079-2020
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