What is the purpose of the distribution pipe that injects feedwater inside a boiler?

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The purpose of the distribution pipe that injects feedwater inside a boiler aligns with the function of reducing thermal shock in the drum. By carefully injecting the feedwater, it helps to prevent abrupt temperature changes that can occur when cold water enters a hot environment. This reduction in thermal shock is critical for maintaining the integrity of the boiler's materials and ensuring safe operation.

Properly managing the temperature differential is essential in avoiding stresses that could lead to cracks or structural weakness over time. As such, this design is integral to the overall reliability and safety of the boiler system.

Other options do highlight important aspects of boiler operation; however, they do not accurately capture the primary role of the feedwater distribution pipe in terms of minimizing thermal shock. For instance, improving steam and water separation or introducing feedwater against heating surfaces may contribute to efficient operation but are not directly related to thermal shock considerations. Also, the specifications regarding pipe materials, such as minimum schedule requirements, pertain to factors like pressure ratings and strength, not specifically to preventing thermal shock.

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