Discussion on Drum-type and Cone-type Piercing Mills

Based on a review of the evolution of the cone-type piercer, a comparison is conducted between the drum-type piercer and the cone-type piercer in terms of the deformation features, main technological indexes, investment and production cost.As a result, it is pointed out that neither of the two different types of piercers is the substitution for each other.Choice of the proper piercing mill depends on all the elements involved such as billet supply conditions, technological requirements and relevant economic involvements, etc., which must not be taken in the lump.No seamless steel tube plant equipped with a drum-type piercer or a cone-type piercer can be deemed as the best choice for manufacturing high alloy steel tube production.