Is galvanized pipe permitted for foam concentrate piping?

• A. True
• B. False
• C. Not specified
• D. Undetermined

Answer: (B)

Material compatibility and corrosion resistance are essential for foam concentrate piping. The zinc coating on galvanized pipe can react with or be attacked by many foam concentrates, leading to corrosion, coating deterioration, and potential contamination or blockages in the system. To maintain the integrity and reliability of the foam system, piping is specified to be made of materials that resist the chemicals in the concentrate, such as carbon steel with appropriate lining or stainless steel. Because galvanized pipe cannot guarantee this compatibility over time, it is not permitted for foam concentrate piping.