Nearly 3,000 degrees Fahrenheit. That’s the kind of heat required to turn recycled scrap metal into ductile iron pipe carrying drinking water across the United States.
In this clip from the U.S. Pipe foundry in Alabama, Jeff Mason explains the chemistry and quality control behind the molten iron process. As iron flows from the cupola, workers carefully monitor the material, remove sulfur with lime, and scrape away impurities known as slag before the iron is poured into pipe molds.
The chemistry matters. Small variations in the metal can affect the long-term strength, durability, and performance of pipe expected to remain underground for decades under pressure.
It’s a reminder that modern water infrastructure depends not only on heavy industry and massive machinery, but also on precision metallurgy and constant testing behind the scenes.
Full episode at https://youtu.be/s8k1V0aBUpE?si=9ib2UhQPYTIe9Cyu
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