GB/T 42266-2022 in English
VALIDFlexible cellular polymeric materials—Laboratory assessment of horizontal burning characteristics of small specimens subjected to a small flame
- Issued on:2022-12-30
- Implemented on:2023-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$204.00
《GB/T 42266-2022柔性多孔聚合物材料 小试样在小火焰下水平方向燃烧特性的实验室评估》由TC35（全国橡胶与橡胶制品标准化技术委员会）归口，TC35SC7（全国橡胶与橡胶制品标准化技术委员会橡胶杂品分会）执行，主管部门为中国石油和化学工业联合会。
Introduction
1. Background and significance of standard formulation
GB/T42266-2022/ISO3582:2000 was formulated to unify the horizontal combustion characteristics evaluation method of flexible porous polymer materials under small flames. This standard is equivalent to the international standard ISO3582:2000, and has been adaptively adjusted in combination with China's actual situation, adding terms and definitions, etc., and is applicable to specimens with a thickness greater than 5mm.
2. Comparison of standard frameworks
| Dimensions | GB/T42266-2022 | ISO3582:2000 | Difference analysis |
|---|---|---|---|
| Scope of application | Flexible porous polymer material, thickness ≥5mm | Same as above | No difference |
| Test equipment | Combustion chamber, burner, timer, etc. | Same as above | Added detailed requirements for supporting steel mesh |
| Test procedure | Flame adjustment, sample positioning, combustion observation | Same as above | Added the optionality of mass loss measurement |
3. Test equipment and operating specifications
Combustion chamber: Consists of a steel frame and heat insulation board, with dimensions of 600mm×300mm×760mm, equipped with a movable sealed observation window. There must be no convection wind in the combustion chamber to ensure that the hot circulating air passes through the sample normally.
4. Practical application case analysis
A company used this standard to test a flexible foam material with a thickness of 10mm, and recorded the following key data: average burning speed is 50mm/s, average extinguishing time is 30s, and average burning length is 60mm. Through analysis, it is found that the combustion characteristics of this material under a small flame are relatively stable, and it is suitable for use in low fire risk environments.
5. Implementation recommendations
- Before testing, ensure that all equipment meets the standard requirements, especially the flame size and temperature parameters of the burner.
- Strictly control the sample preparation conditions, including size, thickness and surface treatment.
- For quality control testing, it is recommended to complete the test within 72 hours after production and ensure the uniformity and representativeness of the sample.
- Regularly calibrate measuring tools (such as balances, timers) to ensure data accuracy.
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