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The manufacture of steel tubing -- pipe mills at the National Tube Works, McKeesport, Pennsylvania. Pushing the skelp into the welding furnace. Welding flanges on a 22-inch pipe.
Source: Steve Kirch, collector, and creator of a great website about SCIENTIFIC AMERICAN in the past
Restoration by: magscanner
- Created on
- Saturday 12 December 2009
- Posted on
- Saturday 12 December 2009
- Tags
- fabrication, foundry, iron, steelworks
- Visits
- 1149