Which type of extrusion method is used for large diameter polyethylene pipe?

The selection of side extrusion as the method used for large diameter polyethylene pipe is based on the specific characteristics and requirements of the extrusion process.

Side extrusion allows for the optimal production of large-diameter pipes by enabling the use of larger dies that facilitate the flow of the molten polyethylene material. This method also provides better control over the wall thickness, ensuring uniformity across the pipe's diameter, which is critical for maintaining the structural integrity and performance of polyethylene pipes used in various applications.

Moreover, side extrusion generally supports higher output rates, which is particularly advantageous when manufacturing large pipes, as it can increase efficiency and reduce production time. The positioning of the die also enables easier handling and cooling of the extruded material, which is especially beneficial given the scale of large diameter pipes.

While other extrusion methods may have advantages in specific applications, side extrusion is particularly well-suited for producing large-diameter polyethylene pipe.