What are the typical types of cross-sectional deformations in PPR plastic pipe production lines?
Release Time:
Jul 28,2022
The degree of elliptical deformation is called ellipticity. Generally speaking, the larger the bending angle, the smaller the bending radius, the larger the diameter, the thinner the pipe wall, and the greater the ellipticity produced during bending. Recommended bending radius: The bending radius of cold bent elbows is more than 4 times the nominal diameter, and that of hot bent elbows is more than 3.5 times.
1. Elliptical deformation of cross-section
The degree of elliptical deformation is called ellipticity. Generally speaking, the larger the bending angle, the smaller the bending radius, the larger the diameter, the thinner the pipe wall, and the greater the ellipticity produced during bending. Recommended bending radius: The bending radius of cold bent elbows is more than 4 times the nominal diameter, and that of hot bent elbows is more than 3.5 times.
2. Deformation of pipe wall
The outer tube wall elongates and thins, and the further away from the neutral layer, the more the tube wall elongates and thus thins; The inner tube wall is shortened and thickened.
3. Inner pipe wall wrinkled and deformed
When bending thinner pipes, the inner wall of the PPR plastic pipe production line may experience wrinkling deformation due to unstable metal structure during compression deformation. In addition to thickening, wrinkling deformation may also occur. The thinner the pipe wall, the poorer the structural stability, and the more prone it is to wrinkling deformation.
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