The National Iron & Steel Heritage Museum
Boilers
Lukens Steel Company manufactured high tensile steel plate, rolled on the 206” Rolling Mill, for this drum, which went into the largest boiler ever built. The drum was 60 feet long, 5 feet in diameter, and could handle 1,370,000 pounds of steam an hour.

Photograph: Lukens Steel Company 1950 Annual Report — National Iron & Steel Heritage Museum