Piercing plug for seamless steel pipes production

Brief instruction

Pipes are developped from solid round steel billets. The billet is charged into a rotary hearth furnace. After
the billet is discharged from the rotary hearth furnace, a small hole is punched into its end. This indentation acts as a starting point to aid in rotary piercing.Piercing plug is used in the piercing process. The quality
of piercing plug will decide the pipes inner wall quality.

Rotary piercing is a very fast and dynamic rolling process that cross rolls the preheated billet between two barrel-shaped
rolls at a high speed. The cross rolling causes high tensile stresses at the center of the billet. The design of the piercer rolls causes the metal to flow along the roll and over a piercer point as it exits the process.
The piercer point is a high-temperature, water-cooled alloy tool designed to allow the metal to flow over it as a pipe shell forms from the rotary process. Once the pierced pipe shell is produced, it is immediately transferred
to the floating mandrel mill.

Product specification

Products propertites:

http://www.metalgoldshell.com/