Pipe die not to install the pipe die with centrifugal shaft concentricity exceeded the prescribed requirements (
, casting pipe will produce wall thickness difference, so cast iron
pipe in front of the annealing furnace cooling or annealing process can produce ellipse, annealing temperature and the improper collocation can also cause the elliptical pipe chain speed.
Precaution: (1) DN80 -
300 mm centrifuge roller diameter jump value less than 0.
1 mm, the pipe die roller diameter less than 0.
800 mm centrifuge roller diameter jump value less than 0.
15 mm, the pipe die roller diameter less than 0.
800 mm pipe die and centrifuge shaft concentricity is less than 0.
Form a habit of heat pipe charging, avoid ellipse on cooling.
(3) annealing at high temperature chain speed should be faster.
(4) in order to prevent ductile pipe
ellipse during storage, DN700, DN800 bulb requires increasing wood in the socket.
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