GB/T 5480-2017 in English
VALIDTest methods for mineral wool and its products
- Issued on:2017-12-29
- Implemented on:2018-11-01
- File Format:PDF
- Delivery:Via email within 5 business days
$418.00
《GB/T 5480-2017矿物棉及其制品试验方法》由TC191（全国绝热材料标准化技术委员会）归口，主管部门为中国建筑材料联合会。
Introduction
Analysis of Core Changes in Standards
| Technical Indicators | 2008 Edition | 2017 Edition | Impact of Changes |
|---|---|---|---|
| Unit of Right Angle Deviation | Percentage | mm/m | Improve Engineering Applicability |
| Flatness Detection Method | Block Method | Test Platform Method | Reduce Human Error |
| Slag Ball Separation Method | Wet Method Only | Add dry method | Improve detection efficiency |
| Acidity coefficient determination | Chemical analysis method | ICP-AES arbitration method | Accuracy improved to 0.01% |
Key technical points of key test methods
1. Fiber diameter detection (Chapter 8)
Use the 200x microscope method, requiring the measurement of ≥100 effective fibers. After the airflow meter method is cancelled, please note:
- Immersion ratio: glycerol and distilled water 1:1
- Sampling volume: 1-2mm³ crushed fiber
- Calculation formula: X̄=(∑Xi)/n
2. Determination of slag ball content (Chapter 9)
Separation deviceFlow control requirements:
- Initial flow: 60L/h
- Separation flow: 120-180L/h
- Drying temperature: 105-110℃
Innovation of dry method: The rubber stopper friction screen is processed with a soft paint brush, which is suitable for rapid detection scenarios.
Application of New Detection Technology
Determination of Acidity Coefficient by ICP-AES (Article 10.4)
| Element | Characteristic Wavelength(nm) | Detection Limit(μg/mL) |
|---|---|---|
| Al | 396.152/309.271 | 0.05 |
| Ca | 317.933/315.887 | 0.03 |
| Mg | 285.213/279.553 | 0.02 |
Pretreatment requires the use of perchloric acid + hydrofluoric acid to decompose the sample, and the detection limit is 10 times higher than that of the chemical method.
Recommendations for the implementation of the standard
- Laboratory configuration:ICP-AES equipment and diameter ruler (accuracy 0.1mm) are required
- Sample preparation specifications:Shake processing is required before measuring the tube shell (Article 7.2.2)
- Quality control:It is recommended to increase the monitoring of the heating rate of the thermal load test (Article 15.4.3)
- Data comparison:A conversion relationship should be established between the test results of the new and old standards (such as right-angle deviation)
Engineering application case
When a thermal insulation pipe project uses rock wool tube shell for detection:
- Eccentricity detection: measure 8 thickness points according to Article 7.3.5
- Volume density calculation: adopt the new formula ρ=10⁹m/[π(d₁-h)hL]
- Result deviation: about 3.5% lower than the old standard
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