For pumping chloride-containing seawater or acidic media, should pump wetted parts be cast iron, stainless steel, or duplex steel?
• Avoid 304 in chloride seawater due to pitting; choose duplex 2205 or 2507.
• For dilute reducing acids like sulfuric, choose 316L but keep chloride below 200 ppm.
• For severe corrosion or high velocity, choose duplex with PREN > 40.
• Cast iron is only for neutral clean water, not seawater or acids.
• Confirm concentration, temperature, and velocity before specifying the grade.
• For dilute reducing acids like sulfuric, choose 316L but keep chloride below 200 ppm.
• For severe corrosion or high velocity, choose duplex with PREN > 40.
• Cast iron is only for neutral clean water, not seawater or acids.
• Confirm concentration, temperature, and velocity before specifying the grade.