User talk:67.173.76.37

Your article ststes: "Subsequent to its invention by Dimitri Sensaud deLavaud, a French-Brazilian, in 1918, much cast iron pipe manufacturing shifted to the dramatically different technique of centrifugal casting." But according to the page on Centrifugal casting- "centrifugal casting was the invention of Alfred Krupp, who used it to manufacture railway tires (cast steel tyres for railway wheels) in 1852." Which is correct? Gimelgort (talk) 16:46, 24 July 2018 (UTC)