Large diameter FRP pipe is an advanced composite material pipe with three-dimensional enhanced structure which is made by 3D printing technology and continuous technology molding. The pipe has not only the properties of hydraulics and corrosion resistance
The steel coil after slitting is unfolded and leveled. Then, they are sent into forming machine. Used the roll, the coil is bent into pipe state. The edge of the steel coil is melted by making use of the proximity effect and skin effect of high frequency