Heat Exchanger U Tube Description
U-shaped heat exchanger tube is the core element of the shell and tube heat exchanger, consisting of a number of metal tubes bent into a U-shape, both ends are fixed to the same tube plate to form a bundle, allowing free expansion to compensate for the difference in thermal expansion. Fluid in the U-shaped tube (tube course) and shell course between the reverse flow to achieve heat exchange.
Stainless steel materials:
304/304L: basic austenitic stainless steel, resistant to weakly corrosive media (e.g. steam, fresh water);
316L: containing molybdenum (2-3%), resistant to chloride pitting (for seawater, salt water)310; duplex steel: e.g. S22053, combining strength and resistance to chloride stress corrosion311 316L: with molybdenum (2-3%), resistant to chloride pitting (for seawater, salt water);
Duplex: e.g. S22053, combining strength and resistance to chloride stress corrosion.
Special materials:
High-temperature conditions: TP321 (Ti stabilised) to resist intergranular corrosion;
Strongly corrosive environments: nickel-based alloys (e.g. Incoloy 825).
Standard:
General Standard: ASTM A213 (American Standard);
High Pressure Certification: ASME SA213 Pressure Requirements.
Heat Exchanger U Tube specification
|
Parameters |
Range |
Instructions |
|---|---|---|
| Diameter | Φ10mm～Φ76mm |
Small pipe diameter (Φ10-25mm) to enhance compactness |
| Wall Thickness | 0.8mm～8.0mm |
≥3mm for high pressure conditions |
| Length | 1.0m～12.0m |
Long pipes (>6m) reduce flow resistance |
|
Bending radius |
≥1.5 times pipe diameter |
Avoid stress concentration at bends |
| Pressure | ≤10MPa |
High pressure scenarios such as nuclear power up to 17MPa |
Heat Exchanger U Tube for sale
Advantages
- Elimination of thermal stress: U-shaped structure can be freely extended and retracted, and can withstand the temperature difference between tube and shell ≥50℃;
- Easy maintenance: The overall pull-out design of the tube bundle is convenient for shell cleaning and maintenance;
- High-pressure adaptability: The pressure bearing capacity of seamless tube structure (such as cold drawing process) is better than that of straight tube;
- Compact layout: The heat exchange area is increased by 15-20% compared with the fixed tube plate type under the same volume;
- Corrosion resistance guarantee: Mirror polishing (Ra≤0.8μm) reduces scaling and prolongs service life.
Applications
| Industry | Applications | Material |
|---|---|---|
| Petrochemical | Crude oil heating/cracking reactor | 316L, Duplex Steel |
| Electric Energy | Nuclear power secondary circuit/waste heat recovery | TP304H, nickel-based alloy |
| Food and Pharmaceuticals | Sterilization equipment/pure steam generator | 316L mirror tube |
| Desalination | Multiple effect evaporator tube bundle | Super Duplex Steel |
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