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EN 45545-2 Fire behaviour requirements – materials Fire safety performance levels for component materials are set for each of the Hazard Levels for internal and external use for the following parameters - Flammability LOI, Smoke emission and Toxicity. Requirements are fixed by Conduit Circumference and Application Area
根据软管的周长和应用领域定义P < 0.2m
R 22 (Internal use 内部使用)
R 23 (External use 外部使用)
(P circumference 周长 = π x d 圆周率 x 直径)
(d 直径= 200mm / π)
(d 直径 < 63.66mm)
NW48 OD = 54.5mm
标称内径 NW48 的软管外径 =54.5mm
EN45545-2:2013 R22 / R23 Testing Requirements: 2. R23 Materials 材料：
车外用软管 Hoses-exterior
3. EN ISO 4589-2 Ambient temperature test 室温氧指数测试：
EN ISO 4589-2:2006 Plastics-Determination of burning behaviour by oxygen index-Part 2:
Ambient-temperature test (ISO 4589-2:1996+Amd.1:2005)(includes Amendment A1:2006)
塑料-用氧指数法测定燃烧行为-第 2 部分:室温试验.
EN ISO 4589-2 oxygen index definition 氧指数定义：
When the oxygen and nitrogen mixture of 23°C±2°C degree C is entered, the minimum oxygen concentration of the material is maintained, which is expressed in volume fraction.
The oxygen index testing principle vertically fixed an upward flow of oxygen in a sample of size: (80-150) x (10+-0.5)x (4+-0.25)mm.
in a transparent combustion cylinder of a nitrogen mixture, the top of the sample is ignited and the combustion characteristics of the sample are observed and the sample is continuously burned. The interval or combustion length is compared with the given data, and the minimum oxygen concentration is estimated by a series of experiments at different oxygen concentrations.
通入 23°C±2°C 的氧、氮混合气体时，刚好维持材料燃烧的最小氧浓度，以体积分数表示。
氧指数测试原理将一个试样; 尺寸大小: (80-150) x (10+-0.5) x (4+-0.25)mm 垂直固定在向上流动的氧、氮混合气体的透明燃烧筒里，点燃试样顶端，并观察试样的燃烧特性，把样品连续燃烧时间或燃烧长度与给定的数据相比较，通过在不同氧浓度下的一系列试验，估算氧浓度的最小值。
4. EN ISO 5659-2 Smoke density test 烟密度测试： Sample pretreatment 样品预处理:
Samples of size in square 75±1mm and thickness of 1±0.1mm or as far as possible, the material should be tested in the end-use thickness. Before testing, the samples were placed at 23°C±2°C, and humidity at (50±10)% for at least 24 hours before reaching the test requirements.
样品尺寸为75±1mm 方形，厚度为1±0.1mm或尽最大可能，材料应为最终产品的厚度下进行测试。进行测试前，预先将样品放置在温度23°C±2°C，湿度在(50±10)% 至少24小时，以达测试要求。
Test method 测试方法: The test method of smoke density (Ds) was carried out according to the standard of EN ISO 5659-2. The samples were tested in a sealed furnace, and the samples were tested under the 2.50W/cm2 condition. 1.5 minutes, fourth minutes of smoke density data and the maximum smoke density data within the whole test time were recorded. The whole test time was 20 minutes.
烟密度 (Ds) 测试方法按照 EN ISO 5659-2 标准进行。样品在一个密封的炉内进行测试，样品分别在 2.50W/cm2 条件下进行烟密度测试。记录第 1.5 分钟, 第 4 分钟烟密度数据及整个测试时间内最大烟密度数据, 整个测试时间为 20 分钟。
5. NFX70-100-1/-2 Toxicity test 毒性测试 The CIT value of the toxicity index is calculated.
In gas (CO² 、CO、HF、HCI、HCN、NO² 、SO² 、HBr), the content “ti" is expressed in milligrams per gram of material gas. From the “ti" value and the corresponding dangerous concentration value "Cci", the commonly known toxicity index " C.I.T " can be determined.
毒性指数CIT值计算:
在气体中（CO² 、CO、HF、HCI、HCN、NO² 、SO² 、HBr），含量 ”ti” 用每克材料气体的毫克表示，从”ti” 这些数值及相应的危险浓度值 ”Cci” 中，通常被称为的毒性指数 ”C.I.T” 便可确定。
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