Which of the following is not a non-ferrous piping material?

• A. Brass
• B. Bronze
• C. Steel pipe
• D. PVC

Answer: (C)

Steel pipe is categorized as a ferrous material, primarily composed of iron, which is why it stands out as the correct choice in this context. Non-ferrous materials are characterized by the absence of iron and may include metals like copper, brass, or bronze, as well as synthetic materials such as PVC.

Brass and bronze are both alloys that do not contain significant amounts of iron; instead, brass typically consists of copper and zinc, while bronze is primarily made from copper and tin. PVC, or polyvinyl chloride, is a plastic that falls under the non-ferrous category due to its lack of metallic content. Therefore, identifying steel pipe as the only ferrous option effectively distinguishes it from the others, which are all considered non-ferrous materials.