What are the Requirements for The Use and Inspection of Pig-iron Ladle, Ladle, Tundish, and Slag Ladle?

Pig-iron Ladle

The Requirements for The Use and Inspection of Pig-iron Ladle, Ladle, Tundish, and Slag Ladle are as follows:
(1)The shell of the pig-iron ladle, ladle, and tundish shall be provided with exhaust holes.
(2) The trunnion of the tundish body shall be located at the symmetrical center 0.2 ~ 0.4m above the synthetic center of gravity of the tank body, and its safety factor shall not be less than 8. It can be used only after passing the heavy load test with 1.25 times the load.