The wall thickness of an HDPE pipe mainly depends on the pipe diameter, pressure requirement, HDPE material grade, and required SDR (Standard Dimension Ratio). During the HDPE pipe manufacturing process, the die size and extrusion settings are adjusted to achieve the required wall thickness. The HDPE pipe extrusion machine also plays an important role. The extrusion speed, material flow, die design, and haul-off speed need to be properly controlled for uniform thickness. For different pipe sizes and applications, the HDPE pipe manufacturing machine can be set according to the required specifications. In an HDPE pipe extrusion plant, proper sizing, cooling, and pulling control help maintain consistent wall thickness throughout the pipe.