PVC pipe production process

The invention relates to a PVC (polyvinyl chloride) pipe production process, which comprises the steps of burdening, extrusion molding, vacuum sizing, water tank cooling, traction, cutting and packaging, wherein the water tank cooling step is implemented in a pipe water cooling device; the pipe water cooling device comprises an automatic regulation and control module, a water tank body, a tank cover matched with the water tank body, a first partition plate arranged in the water tank body, and penetrating holes formed in the end of the water tank body and the first partition plate and used for allowing pipes to penetrate through. A cavity of the water tank body is divided into a rapid cooling cavity and a uniform cooling cavity by the first partition plate, the dust blocking assemblies are located on the two sides of the cutting blade respectively, the water tank further comprises blocking covers fixedly arranged on the two sides of the protective cover, immersed cooling and spray cooling are combined, the who