Products Description
Product Specifications
| Standards | ASTM B861 / ASME SB-861 |
| Steel Grades | Grade1 Grade 2/2H Grade3 Grade4 Grade5 Grade7/7H Grade 9 Grade10 Grade11 Grade12 Grade13 Grade14 Grade15 Grade16/16H Grade17 Grade18 Grade 19 Grade 20 Grade 21 Grade 22 Grade 23 Grade 24 Grade 25 Grade26/26H Grade27 Grade28,etc. |
| Equivalent Standards | ASTM B338 / EN 10216-5 / DIN 17861 / GOST 22897 / ISO 15156 |
| Outer Diameter (OD) | 6.0 mm – 114.3 mm |
| Wall Thickness (WT) | 0.5 mm – 8.0 mm |
| Length | Up to 18 m or customized |
| Surface Treatment | Bright Annealed |
| Production Process | Cold Drawn / Cold Rolled |
| Condition | Annealed |
Titanium heat exchanger tubes feature a PREN > 38, rendering them completely immune to chlorides and providing excellent corrosion resistance against chloride salts, sulfates, carbonates, and sulfides; additionally, the tube surface forms a dense, self-healing TiO₂ oxide film (5–10 nm thick).
With a thermal conductivity of 17 W/(m·K) and a minimum wall thickness of 0.5 mm, these tubes achieve an actual overall heat transfer coefficient that is 25% higher than that of thick-walled copper tubes.
Customized Services
TORICH provides comprehensive, customized services for seawater cooling system clients, tailored to specific operating conditions:
- Material customization: A wide range of material grades available, including Grade 1, Grade 2/2H, Grade 3, Grade 4, Grade 5, Grade 7/7H, Grade 9, Grade 10, Grade 11, Grade 12, Grade 13, Grade 14, Grade 15, Grade 16/16H, Grade 17, etc.
- Cold-bent U-tubes: Minimum bending radius of 1.5×OD; services include pre-bending and stress-relief treatment.
- Customized surface treatment: Options include electropolishing, internal bore polishing (Ra ≤ 0.5 μm), bright annealing, pickling and passivation, etc.
Chemical Composition
| Element | Ti | O | C | N | H | Fe | Pd / Ni / Mo (if applicable) |
|---|---|---|---|---|---|---|---|
| Gr.2 | Balance | 0.25 | 0.08 | 0.03 | 0.015 | 0.30 | - |
| Gr.7 | Balance | 0.25 | 0.08 | 0.03 | 0.015 | 0.30 | Pd: 0.12–0.25 |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength 0.2% (MPa) | Elongation (%) | Hardness (HB) |
| Gr.2 | ≥ 345 | ≥ 275 | ≥ 20 | ≤ 120 |
| Gr.7 | ≥ 345 | ≥ 275 | ≥ 20 | ≤ 120 |
Possible Alternative Grades
- The cost of 2205 duplex stainless steel is approximately 50% that of titanium tubing; it is suitable for standard industrial cooling systems with limited budgets that handle clean media, maintain stable flow rates, and do not require prolonged shutdowns.
- Grade 16 costs 20–30% less than Grade 7; while its corrosion resistance is slightly lower than that of Grade 7, it remains far superior to commercially pure titanium, making it suitable for moderately aggressive reducing environments.
- When strength requirements constrain the design wall thickness of a cooler-but the operating temperature is below 50°C, and the medium is clean seawater-Grade 3 is a suitable choice; its higher strength than Grade 2 allows for reduced wall thickness and improved heat transfer efficiency.
application areas
In seawater cooling systems, ASTM B861 titanium heat exchanger tubes are primarily used in the following key equipment:
- Condensers for coastal and nuclear power plants
- Open Rack Vaporizers (ORV) and Intermediate Fluid Vaporizers (IFV) for LNG receiving terminals
- Central cooling systems for marine vessels
- Multi-Stage Flash (MSF) and Multi-Effect Distillation (MED) seawater desalination units
- Process coolers for offshore oil platforms
- Brine refrigeration units for the chemical industry
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
FAQ
Q: Why do titanium tubes offer better heat transfer performance despite having lower thermal conductivity than copper?
A: Although titanium's thermal conductivity (17 W/m·K) is lower than that of copper (400 W/m·K), titanium tubes can be made thinner (0.5 mm), and their surfaces are resistant to fouling.
Q: How do I choose between Grade 2 and Grade 7?
A: Grade 2 is suitable for standard seawater cooling applications involving temperatures ≤60°C, continuous flow, and no stagnant, oxygen-depleted zones. Grade 7 contains palladium and is suitable for conditions where water temperatures exceed 80°C, H₂S or reducing contaminants are present, or equipment may remain idle for extended periods without being drained.
Q: What tube-end treatments are available for titanium tubes?
A: TORICH offers customization services for beveled ends, plain ends, flared ends, swaged ends, and chamfered ends.
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