Foam concentrate fittings shall NOT be made of which material?

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Multiple Choice

Foam concentrate fittings shall NOT be made of which material?

Foam concentrate fittings must be made from materials that won’t corrode or contaminate the foam over time. Carbon steel and galvanized fittings fail this test because many foam concentrates are corrosive to steel and the zinc in galvanizing can also react with or contaminate the foam. This leads to leaks, degraded fittings, and foam contamination. Stainless steel, aluminum, and plastic are chosen because they offer better resistance to the chemicals in foam concentrates and won’t degrade as quickly in service. Stainless steel provides strong corrosion resistance; aluminum is suitable for many concentrates and keeps fittings lighter; plastic resins resist chemical attack and won’t corrode. The point is to use materials that stay compatible with the foam and maintain system integrity.

Foam concentrate fittings must be made from materials that won’t corrode or contaminate the foam over time. Carbon steel and galvanized fittings fail this test because many foam concentrates are corrosive to steel and the zinc in galvanizing can also react with or contaminate the foam. This leads to leaks, degraded fittings, and foam contamination.

Stainless steel, aluminum, and plastic are chosen because they offer better resistance to the chemicals in foam concentrates and won’t degrade as quickly in service. Stainless steel provides strong corrosion resistance; aluminum is suitable for many concentrates and keeps fittings lighter; plastic resins resist chemical attack and won’t corrode. The point is to use materials that stay compatible with the foam and maintain system integrity.

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