Selection of outer diameter size for long-distance pipeline pigging devices
Thread Content
How to select the interference amount for the outer diameter of pigging devices in long-distance pipelines, and what determines the friction between the pigging device and the pipeline.
X=(D1-D2)/D2*100%; the maximum interference is 8%. If the pipe diameter is 219 and the wall thickness is 8, then the calculation is as follows: 8% = {D1 – (219 – 2*8)} / (219 – 2*8). D1 represents the diameter of the cleaning ball; the pipe is cleaned using a cleaning ball with diameter D1
For rubber bowl pigging devices, use 2–5% of the inner diameter
For rubber bowl pigging devices, use 2–5% of the inner diameter
How is the 2–5% inner diameter determined? Should 2% or 5% be used? Is there a calculation formula, and does friction between the ball and the pipe need to be taken into account?