Home
 
 
Home / Tubular Products / Production Facilities / Seamless #4 Pipe Mill - Lorain, Ohio

Tubular Products


Seamless #4 Pipe Mill - Lorain, Ohio
Seamless Manufacturing Process at #4 Mill - 1.9" to 4.5" O.D.


   
Rotary Hearth Furnace Piercing Mill Mandrel Mill
6" round billets from the continuous caster are heated to proper temperature for centering and piercing.
Heated billets are center punched and then pierced by advancing the billet over a piercer point. The pierced billet (shell) is transferred to a mandrel mill and rolled over a solid mandrel where the O.D. is reduced and length is increased.



   
Reheat Furnace Stretch Reducing Mill (SRM)  Cooling Bed
Before further working, the shell needs to be reheated to proper rolling temperature for the final rolling process.
The hot shell is run through a descaling unit to prepare the O.D. surface for rolling and run through the SRM. At this stage the final O.D. and wall thickness is established for the pipe. 
Upon exiting the SRM, the pipe are allowed to cool on a walking beam cooling bed. Sample inspections are also done at this point. 



 
Batch Sawing Run-Out/Finishing  Finishing
After cooling the pipe are batched together, stenciled and sawed to specified lengths.

Sawed lengths are transferred to a run-out table and moved to finishing. 

Pipe ends are faced on dual automatic facers and sample inspections are done. Outside processors are used for upsetting, heat treating, threading and inspection.





Copyright 2012 United States Steel. All rights reserved. Site feedback.
Please see our Legal Notice for conditions regarding the use of this siteĀ and links provided to third-party Web sites.
Trademarks and Ownership