Products Description
Product Specifications
| Standards | ASTM B338 / ASME SB338 |
| Steel Grades | Grade 2 / UNS R50400 |
| Equivalent Standards | W.Nr. 3.7035 / Ti 99.2 / CP Titanium Grade 2 |
| Outer Diameter (OD) | 6 mm – 219 mm, customized |
| Wall Thickness (WT) | 0.5 mm – 20 mm, customized |
| Length | up to 18 m, customized |
| Surface Treatment | Pickled, Bright Annealed, Polished |
| Production Process | Cold Drawn / Cold Rolled |
| Condition | Cold worked + heat treated |
Grade 2 titanium forms a dense, stable TiO₂ passivation layer on its surface, offering long-term resistance to pH fluctuations, microbial corrosion, and erosion-corrosion from circulating water in power plants, while effectively eliminating common pipe failure issues such as pitting and crevice corrosion.
Titanium Seamless Pipe Grade2 has a density of approximately 4.51 g/cm³-about 44% lighter than 316L stainless steel-which reduces tube bundle weight and structural load, thereby lowering infrastructure investment costs and equipment maintenance burdens for power plants.
Although titanium's thermal conductivity (approx. 16.3 W/m·K) is lower than that of copper-nickel alloys, its superior corrosion and erosion resistance-combined with TORICH's ability to manufacture thin-walled titanium tubes (0.5 mm wall thickness) and the material's inherent resistance to surface scaling-allows for a consistently high overall heat transfer coefficient during long-term operation.
Customized Services
- TORICH offers custom sizing services, manufacturing non-standard outer diameters, wall thicknesses, and lengths from customer drawings, with length tolerances of ±1 mm; extra-long tubes up to 18,000 mm are available.
- Surface treatments such as pickling and passivation, bright annealing, electropolishing, mechanical polishing, and sandblasting can be provided according to customer specifications.
- U-bendingand serpentine bending are performed according to the condenser tube bundle drawings, followed by stress-relief annealing.
- Tube end processing-including end squaring, beveling, deburring, chamfering, flanging, expanding, and swaging-is available upon request.
Chemical Composition
| Element | C | N | H | O | Fe | Ti |
|---|---|---|---|---|---|---|
| Grade 2 | ≤0.08 | ≤0.03 | ≤0.015 | ≤0.25 | ≤0.30 | Balance |
Mechanical Properties
| Property | Tensile Strength | Yield Strength | Elongation | Density | Elastic Modulus | Thermal Conductivity |
|---|---|---|---|---|---|---|
| Grade 2 | ≥345 MPa (50 ksi) | ≥275 MPa (40 ksi) | ≥20% | 4.51 g/cm³ | 105–120 GPa | Approx. 21.8 W/m·K |
Possible Alternative Grades
- For operating conditions involving high-temperature seawater, acidic condensate, or a significant risk of crevice corrosion, Grade 7 (UNS R52400) may be selected; it offers superior corrosion resistance compared to Grade 2, albeit at a higher cost.
- Grade 3 is an option when the condenser design pressure is high or greater mechanical strength is required; while it offers higher strength than Grade 2, it has slightly lower formability and weldability, as well as a slightly higher cost.
- For demanding operating conditions characterized by high pressure, heavy loads, and frequent thermal cycling-such as in condensers for large-scale nuclear power plants or ultra-supercritical thermal power units-Grade 2H titanium may be selected, as it offers superior resistance to deformation and fatigue.
Application areas
- Thermal Power Plants: Surface condensers for large-scale units, unit circulating water cooling systems, waste heat recovery condensers, vacuum condensation heat exchange equipment
- Nuclear Power Plants: Conventional island condensers, seawater cooling heat exchange systems, auxiliary condensation heat exchange equipment
- Gas/Biomass Power Plants: High-efficiency condensation heat exchangers, flue gas waste heat recovery condensation units, unit circulating cooling systems
- Coastal Power Plants: Seawater-cooled condensers, corrosion-resistant heat exchange piping systems designed for high-chloride environments
Packaging
Once the pipes have passed all inspections and tests, they are ready for packaging. They are usually packaged in bales wrapped in plastic. The pipes can be bundled and ready for delivery according to customer requirements, ensuring that the pipes are protected during transportation and prevent surface damage.
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Polishing equipment
Cold drawing equipment
Products Package
FAQ
Q: Why is ASTM B338 Titanium Seamless Pipe Grade2 suitable for power plant condensers?
A: Grade 2 titanium offers excellent resistance to pitting, crevice corrosion, stress corrosion cracking, and erosion-corrosion in seawater, brackish water, and chloride-containing cooling water. Additionally, its high strength-to-weight ratio and long service life meet the requirements for stable, long-term condenser operation.
Q: Are U-tubes or bent tubes available?
A: Yes. We supply U-bends and serpentine coils, provide post-bending stress-relief annealing, and perform post-bending non-destructive testing to meet condenser tube bundle installation requirements.
Q: Is periodic anti-corrosion maintenance required during use?
A: No anti-corrosion coatings or rust-proofing treatments are necessary. Titanium naturally forms a dense, protective passivation layer on its surface with self-healing capabilities. Only routine water quality monitoring is required during operation, significantly reducing power plant O&M costs and downtime for maintenance.
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