什么是低温脆性？低温脆性是指材料的冲击吸收功随温度降低而降低，PVC水管生产，当试验温度低于Tk(韧脆临界转变温度)时，冲击吸收功明显下降，朝阳区PVC水管，材料由韧性状态变为脆性状态，PVC水管，这种现象称为低温脆性。
What is low temperature brittleness? Low temperature brittleness means that the impact absorbed energy of material decreases with the decrease of temperature. When the test temperature is lower than TK (critical transition temperature of toughness and brittleness)， the impact absorbed energy decreases clears， and the material changes from ductile state to brittle state. This phenomenon is called low temperature brittleness.
同种规格的PPR热水管壁厚要比冷水管的厚，简单举例：D25×2.3 D25×2.8 D25×3.5 D25×4.2 这里列举的是外径为25MM的PPR管所对应的四种不同规格，前面两种为冷水管，后面两种为热水管，因此可以非常明显的看出，冷水管的壁厚要小于热水管。
The wall thickness of PPR hot water pipe of the same specification is thicker than that of cold water pipe. Simple example: D25 × 2.3 D25 × 2.8 D25 × 3.5 D25 × 4.2 here are four different norms of PPR pipe with outer diameter of 25 mm. The first two are cold water pipes and the latter two are hot water pipes. Therefore， it is very clear that the wall thickness of cold water pipe is ***aller than that of hot water pipe.
管材管道在使用过程中热胀冷缩现象也是不可避免的。选自耐水性材料的PPR管道刚性增强，水平布管时不易下垂，增加了管线的美观，管道的弯曲回弹性得到提高，在高温下时仍保持外形的稳定。
The phenomenon of heat expansion and cold contraction is inevitable in the use of pipe. The PPR pipe selected from water-resistant material has stronger rigidity， and it is not easy to sag during horizontal pipe laying，PVC水管代理， which increases the appearance of the pipeline， improves the bending resilience of the pipeline， and maintains the stability of the shape at high temperature.
朝阳区PVC水管-Gafloon卡弗龙-PVC水管由台州艾菲力塑胶有限公司提供。台州艾菲力塑胶有限公司为客户提供“塑料制品（不含塑料桶）,橡胶制品（不含橡胶桶）,阀门”等业务，公司拥有“Gafloon卡弗龙”等品牌，专注于塑料管等行业。，在浙江省台州市三门县西区开发区的名声不错。欢迎来电垂询，联系人：郑总（Rainy）。同时本公司还是从事PPR管，地暖管，PVC管的厂家，欢迎来电咨询。