Circumferential Bending Stiffness: It measures the ability of pipeline to resist circumferential deformation. Unit KN㎡, pvc double-walled corrugated pipe is a plastic pipe with rigid pvc as the main raw material, which is extruded from the inside and outside respectively and molded at one time. The inner wall is smooth, the outer wall is trapezoidal and corrugated, and the inner and outer walls are hollow by sandwich walls.
Extended data
Generally, the process route of HDPE double-wall corrugated pipe for PE large-diameter pipeline is guaranteed, and its equipment is made of special materials such as polymerization and vinyl chloride, which have been filtered, compressed and condensed, washed with high-pressure water, and adjusted in sections.
The main steps of polymerization are divided into two stages, namely prepolymerization and polymerization. When the conversion rate of large-diameter corrugated pipe reaches 60%-85% (depending on the formula), the reaction is terminated, the unreacted monomer is degassed and recovered in the polymerization kettle, then stripped in the kettle to further remove the residue in the pipe, and finally the powder in the pipe is sent to the processes of classification, homogenization and packaging through the pneumatic conveying system, so the process route is the same, but there are differences.
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Study on Maximum Covering Thickness of HowNet-—HDPE Double-wall Bellows