Can PVC pipes be hot melted?
PVC管的连接方式主要有密封胶圈、粘接和法兰连接三种，PVC管不能热熔连接。
The connection methods of PVC pipes mainly include sealing rubber ring, bonding and flange connection. The PVC pipes cannot be connected by hot melting.
PVC（全名Polyvinylchlorid），主要成份为聚氯乙烯，另外加入其他成分来增强其耐热性、韧性、延展性等。这种表面膜的最上层是漆，中间的主要成分是聚氯乙烯，最下层是背涂粘合剂。它是当今世界上深受喜爱、颇为流行并且也被广泛应用的一种合成材料。
PVC (full name Polyvinylchloride), the main component is PVC, and other components are added to enhance its heat resistance, toughness, ductility, etc. The top layer of this surface facial mask is paint, the main component in the middle is PVC, and the bottom layer is back coating adhesive. It is a kind of synthetic material that is deeply loved, popular and widely used in the world today.
PVC管（PVC-U管） 硬聚氯乙烯管，是由聚氯乙烯树脂与稳定剂、润滑剂等配合后用热压法挤压成型，是最早得到开发应用的塑料管材。PVC-U管抗腐蚀能力强、易于粘接、价格低、质地坚硬，但是由于有PVC-U单体和添加剂渗出，只适用于输送温度不超过45℃的给水系统中。
PVC pipe (PVC-U pipe) is made of PVC resin, stabilizer, lubricant, etc. and then extruded by hot pressing. It is the earliest plastic pipe developed and applied. PVC-U pipe has strong corrosion resistance, easy adhesion, low price and hard texture. However, due to the seepage of PVC-U monomer and additives, it is only applicable to the water supply system with the transmission temperature not exceeding 45 ℃.
pvc管管材优点：
1、具有较好的抗拉、抗压强度：但其柔性不如其他塑料管。
2、流体阻力小：PVC-U管材的管壁非常光滑，对流体的阻力很小，其粗糙系数仅为0.009，其输水能力可比同等管径的铸铁管提高20%，比混凝土管提高40%。
3、耐腐蚀性、耐药品性优良：PVC-U管材具有优异的耐酸，耐碱，耐腐蚀，不受潮湿水份和土壤酸碱度的影响，管道铺设时不需任何防腐处理。
4、具有良好的水密性：PVC-U管材的安装，不论采用粘接还是橡胶圈连接，均具有良好的水密性。
5、防咬啮：PVC-U管不是营养源，因此不会受到啮齿动物的侵蚀。根据美国国家卫生基金会在密歇根州进行的试验证明，老鼠不会咬啮PVC-U管材。
6、性能测试：固化时间 收缩率 劈裂强度 拉伸性能 剥离强度 热稳定性 适用期 贮存期 有害物质释发。
Advantages of PVC pipe:
1. It has good tensile and compressive strength, but its flexibility is not as good as other plastic pipes.
2. Small fluid resistance: PVC-U pipe has very smooth pipe wall and small resistance to fluid. Its roughness coefficient is only 0.009. Its water delivery capacity can be 20% higher than that of cast iron pipe with the same pipe diameter and 40% higher than that of concrete pipe.
3. Excellent corrosion resistance and drug resistance: PVC-U pipes have excellent acid resistance, alkali resistance and corrosion resistance, and are not affected by moisture and soil acidity and alkalinity. No anti-corrosion treatment is required during pipeline laying.
4. Good water tightness: PVC-U pipes are installed with good water tightness no matter they are connected by adhesive or rubber ring.
5. Antibite: PVC-U tube is not a nutrient source, so it will not be eroded by rodents. According to the test conducted by the National Health Foundation of the United States in Michigan, mice will not bite on PVC-U pipes.
6. Performance test: curing time shrinkage, splitting strength, tensile strength, peeling strength, thermal stability, applicable period, storage period, release of harmful substances.
