Tie rods are structural tension members that secure tube bundle assemblies within high-pressure heat exchangers against operational forces.
Tie rods are precision-engineered cylindrical tension members used in high-pressure ammonia synthesis loop heat exchanger tube bundles to maintain structural integrity under extreme thermal and pressure differentials. They counteract axial forces generated by thermal expansion and pressure fluctuations, preventing tube sheet deflection and ensuring proper tube-to-tube sheet joint integrity throughout operational cycles.
诱因 → 失效模式 → 工程缓解
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Tie rods prevent tube sheet distortion caused by thermal expansion differentials between tubes and shell, which could lead to tube joint failures and ammonia leaks in high-pressure (15-30 MPa) service.
Initial retensioning after first 500 operating hours, then annually during maintenance shutdowns, or when pressure drop across the exchanger increases by 15% indicating possible bundle movement.
Yes, but all tie rods in a bundle should be tensioned simultaneously using hydraulic tensioners to ensure uniform load distribution and prevent uneven stresses on tube sheets.
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