The High/Low Pressure Heater U-Tube is a specially bent heat exchange tube designed to withstand extreme thermal stresses. Typically manufactured from stainless steel (e.g., TP304, TP304L) or carbon steel, these tubes feature a characteristic "U" shape that allows for free thermal expansion and contraction without the need for complex floating heads. Each tube undergoes rigorous processing, including bright annealing and precision bending, to ensure structural integrity and corrosion resistance in high-temperature environments.

Technical Specifications

The high pressure heater and low pressure feed water heater in large thermal power plants are made through assembly of U tubes with different semidiameters. U tube is featured by small diameter and thin wall, and is ultra long.

Key Advantages

• Superior Thermal Performance: Optimized heat transfer coefficients ensure maximum energy recovery.
• Thermal Stress Management: The U-bend geometry accommodates high temperature differentials, preventing mechanical fatigue.
• Maintenance Efficiency: Compact tube bundles allow for easier inspection and cleaning procedures.
• Cost-Effective: Eliminates the need for expansion joints, reducing overall system complexity.

Main Applications

These tubes are primarily utilized in:

• Power Generation: Regenerative feedwater heating in thermal and nuclear plants.
• Boiler Systems: Preheating feedwater to enhance boiler thermal efficiency.
• Petrochemicals: High-pressure heat exchange in refinery processing units.

Packaging & Delivery

To ensure the tubes arrive in perfect condition, we utilize specialized packaging:

• Inner Protection: Tubes are separated by wooden or plastic combs to prevent surface scratching.
• End Sealing: All tube ends are fitted with plastic caps to prevent debris entry.
• Crating: Securely packed in sea-worthy wooden cases or steel frames, clearly marked by bend radius.

Frequently Asked Questions (FAQ)

Q: Why use U-tubes instead of straight tubes in HP heaters?
   A: U-tubes handle thermal expansion naturally within the shell, eliminating the need for floating heads which are prone to leaking at high pressures.

Q: What are the most common materials used?
   A: Stainless steel (TP304/304L) is preferred for corrosion resistance, while carbon steel (SA-556) is often used for its excellent thermal conductivity in specific LP applications.