Out of the choices below, which pipe joint design is most appropriate for high-pressure steam lines_____________?
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Answer: D. expansion
Explanation
Expansion joints incorporate flexible bellows or sliding sleeves to absorb thermal dimensional changes. High-pressure steam pipelines experience significant temperature fluctuations during startup and shutdown cycles. Without expansion joints thermal movement would generate destructive mechanical stresses in pipe networks. Materials expand and contract significantly when subjected to high temperature variations in service. Power plant steam lines operate under extreme pressures and temperatures requiring robust piping designs. Pipe stress analysis determines where expansion joints must be installed to prevent buckling.
Power generation plants utilize expansion joints extensively in main steam and feedwater piping runs. District heating distribution networks rely on expansion loops and sliding joints for thermal management. Proper piping design protects fixed equipment nozzles from excessive thermal thrust loads. Flanged joints provide rigid connections that cannot accommodate axial thermal expansion movement. Threaded pipe joints are restricted to smaller low-pressure applications and lack expansion flexibility. Bell and spigot joints are commonly used for underground water mains rather than steam lines.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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