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DKL Engineering, Inc.
Handbook of Sulphuric Acid Manufacturing
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Materials of Construction - Mondi™
Introduction
Mondi™ is a registered trademark of Monsanto Enviro-chem for their improved ductile iron piping system for strong sulphuric acid (>92% H2SO4). Mondi™ is a special ductile iron with closely controlled metallurgy and proprietary modifications for improved performance in acid service. It has improved corrosion resistance to 92-99% acid, at temperatures up to 149°C (300°F). It is 95% ferrite for excellent performance around anodically protected acid coolers.
Mondi™ piping systems operate at higher velocities than standard ductile and gray cast iron. Velocities range from 1.2 to 3.0 m/s (4 to 10 ft/s) for 3" to 30" line sizes.
The Mondi™ system not only involves the improved metallurgy but includes the entire piping system such as: