Serrated Finned Tubes | High Frequency Welded | T22 Base Tube & CS Fins for HRSG / Boiler
High-Frequency Welded Serrated Finned Tubes Base Tube: T22 Alloy Steel | Fins: Carbon Steel (CS)
T22-CS Synergy: Advanced Heat Transfer Solution
Our high-frequency welded serrated finned tubes combine T22 alloy steel base tubes with carbon steel (CS) fins for
unmatched thermal efficiency in extreme environments. The T22 base tube delivers superior high-temperature strength
(up to 550°C), while CS fins maximize heat dissipation through serrated edges that disrupt boundary layers. Ideal for
boilers, HRSGs, and waste-heat recovery systems.
Precision Chemistry: T22 & CS Composition
Optimized for Corrosion Resistance and Thermal Conductivity
| Component | Material | C (max) | Mn | Si | Cr | Mo | P (max) | S (max) |
|---|---|---|---|---|---|---|---|---|
| Base Tube | T22 Alloy | 0.15% | 0.30–0.60% | ≤0.50% | 1.90–2.60% | 0.87–1.13% | 0.025% | 0.025% |
| Fins | Carbon Steel | 0.25% | 0.60% | ≤0.35% | – | – | 0.035% | 0.035% |
Notes: T22 resists oxidation in steam environments; CS fins enhance thermal conductivity (45–50 W/m·K).
T22-CS Dimensional Tolerances: Engineered Accuracy
Guaranteed Fit for Critical Applications
| Parameter | Tolerance | Standard |
|---|---|---|
| Base Tube OD | ±0.15 mm | ASTM A450 |
| Wall Thickness | +10% / -5% | EN 10204-3.1 |
| Fin Height | ±0.25 mm | Custom |
| Fin Density (FPI) | ±1 fin/inch | ASME PTC 30 |
| Straightness | ≤1.5 mm/m | ISO 9393 |
T22-CS Application Domains
- Power Generation: Boiler economizers (coal/gas-fired plants), air preheaters.
- Petrochemical: Waste-heat recovery in reformers & crackers (operating temp: 400–550°C).
- Marine: Exhaust gas boilers for LNG carriers.
- Industrial HVAC: High-efficiency heat exchangers in chemical processing.
Customization: T22-CS Tailored Solutions
- Dimensions: Base tubes: 25–150 mm OD; Fin heights: 10–20 mm; Lengths: ≤20m.
- Fin Configurations: Serrated (standard), solid, or L-footed fins.
- Coatings: Hot-dip galvanizing (fin-only) or aluminizing for acid gas resistance.
- Certifications: EN 10204 3.1, ASME Section I compliance.
Why Our T22-CS Finned Tubes?
✅ 15+ Years Expertise: 500+ projects in power/petrochemical sectors.
✅ Zero-Gap Welding: High-frequency welding ensures >98% fin bond integrity (tested per ASTM E290).
✅ Quality Assurance: 100% eddy-current testing, hydrostatic pressure checks (60 bar min).
✅ Lead Time: 30 days for standard orders; 45 days for custom specs.
✅ Global Compliance: CE, PED, and ASME stamps available.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.