PPR(PERT)-Glass Fiber-PPR(PERT)Three layers composite pipe production line is a new kind of plastic pipe production line,is specially developed by our company with the proctice experience of many years after absorbing the foreign advanced technology.The mould of the line is specially designed by ourselves,the structure of mould has three layers.the structure of every layer adopts the spiral model,the material diffluence is very even,and it can ensure that the inner surface of pipe is very smooth,no diffluence mark,The PPP(PERT)-Glass Fiber-PPP(PERT)composite pipe produced by this line is of high strength,high pressurization,and reduce the material cost.