With the continuous development of all walks of life, people have higher and higher requirements for materials. Because of its excellent performance, pvc pipe coupling are welcomed by major enterprises. The essence of PVC pipe is vacuum plastic film, which is used for surface packaging of various panels. Therefore, it is also known as decorative film and adhesive film. It is used in many industries, such as building materials, packaging, medicine and so on. Therefore, as one of the products of scientific and technological development, PVC pipe can be seen in daily life. For different industries, different sizes and specifications of PVC tubes are needed. So, what's the difference between these different sizes of pvc pipe coupling? Here's a brief introduction.