Clearly, polyvinyl chloride (PVC) is one of the most widely used products in the world today. It is so rich that it can be produced as long as you want. It is a well-loved, popular and widely used synthetic material in the world today. Its global use ranks second among various synthetic materials. According to statistics, in 1995 alone, PVC production in Europe was about 5 million tons, and its consumption was 5.3 million tons. It is also a very lightweight thing, so its usage is very scary. PVC pipes are divided into hard and soft, hard to believe that everyone knows, but soft PVC pipe fittings?