When do you use cast iron piping?

When do you use cast iron piping?

• A. When temperature and pressure are not critical
• B. When temperature and pressure are not high
• C. When corrosion resistance is required
• D. When vacuum conditions exist

Answer: (A)

Cast iron piping is chosen for systems where flow is by gravity and the fluid isn’t under much pressure or heat—like drainage and waste lines. In these applications the temperature and pressure aren’t significant, so cast iron’s durability and stiffness do the job without needing materials that handle high temperatures or high pressures. If the system carried hot liquids, high pressures, or required strong corrosion resistance, other materials would be a better fit.