What fluid is carried by a piping system having hand wheels colored purple?

The piping system with hand wheels colored purple is indicative of JP-5, which is a naval aviation fuel known for its high flash point and stability compared to other fuels. This color coding is part of the Navy's system for identifying various fluids and substances transported through different piping systems, helping ensure safety and proper handling during operations.

JP-5 is primarily used in aircraft aboard naval vessels, and its unique characteristics make it suitable for carrier-based operations. Recognizing the color coding is essential for personnel to quickly identify and differentiate between various piping systems, especially in emergency situations where proper safety measures must be followed.