National Tube Works
Incorporated 1869, the works began production here, 1872. By 1901, when it became a subsidiary of U.S. Steel, this was the world's largest pipe producer. Major advances in inspection techniques originated here. Plant operations ceased in 1987.
Marker is on Lysle Boulevard (Pennsylvania Route 148) 0.2 miles west of Coursin Street, on the right when traveling west.
Courtesy hmdb.org
