What kind of pipe must liquid lines through 24 inches in an NH3 system use?

The correct choice emphasizes the importance of using A333 seamless or A106 seamless pipes for liquid lines larger than 24 inches in an NH3 (ammonia) system due to their specific material properties and suitability for high-pressure applications.

A333 seamless pipe is designed for low-temperature service, making it ideal for ammonia transportation, which can involve significant temperature variations. Seamless pipes offer higher strength and better integrity than welded or threaded options, reducing the risk of leaks or failures in high-pressure situations. A106 seamless pipe is also widely accepted for high-temperature service, contributing to the overall durability and reliability crucial in ammonia systems.

Using the correct type of pipe is vital for ensuring the safe operation of the NH3 system, as the high pressure and potential hazards associated with ammonia require materials that can withstand these demanding conditions without failure.