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We offer tubes in Sanicro® 28, a high-alloy austenitic stainless steel particularly suited for use in phosphoric acid production.
Phosphate rock contains many impurities, such as chlorides and fluorides, which make phosphoric acid very corrosive to metals. The highly corrosion-resistant tube grade Sanicro® 28 is specially developed to replace graphite tubes in heat exchangers for concentrated phosphoric acid. With proper heat exchanger design, tubes in Sanicro® 28 outperform graphite tubes by several years.