For Halon 1301 systems, the pipe thickness calculation is based on which factors?

For Halon 1301 systems, the pipe thickness calculation is based on which factors?

• A. The ambient temperature and humidity
• B. The pipe length and diameter
• C. The maximum storage pressure and the maximum storage temperature.
• D. The color of the storage container

Answer: (C)

The main factor in sizing Halon 1301 piping walls is the design pressure the pipe must withstand. In Halon 1301 systems, the agent is stored under high pressure, and as storage temperature changes, the pressure inside the piping can vary. Designing for the maximum storage pressure at the highest storage temperature gives the worst-case pressure the pipe will experience, so the wall thickness is chosen to safely resist that pressure with the material’s allowable stress. Ambient temperature or humidity outside the system isn’t used to set the pipe thickness, and while pipe length and diameter affect flow and pressure loss, they don’t determine the required wall thickness. The color of the storage container is irrelevant to the piping design.

The main factor in sizing Halon 1301 piping walls is the design pressure the pipe must withstand. In Halon 1301 systems, the agent is stored under high pressure, and as storage temperature changes, the pressure inside the piping can vary. Designing for the maximum storage pressure at the highest storage temperature gives the worst-case pressure the pipe will experience, so the wall thickness is chosen to safely resist that pressure with the material’s allowable stress. Ambient temperature or humidity outside the system isn’t used to set the pipe thickness, and while pipe length and diameter affect flow and pressure loss, they don’t determine the required wall thickness. The color of the storage container is irrelevant to the piping design.