Studded Fin Tube for Waste Heat Boilers (ASTM A213 T9)
ASTM A213 T9 studded tubes, also referred to as studded fin tubes, are high-performance heat transfer components designed for demanding waste heat recovery applications. Manufactured from ASTM A213 T9 seamless alloy steel tubing, these tubes are equipped with uniformly welded steel studs on the outer surface to significantly increase the effective heat transfer area while maintaining excellent mechanical strength under elevated temperatures.
The addition of welded studs promotes turbulence in the gas stream, improves heat exchange efficiency, and minimizes fouling compared with plain tubes. These characteristics make ASTM A213 T9 studded tubes an excellent solution for waste heat boilers operating in high-temperature, high-pressure, and corrosive industrial environments.
Our studded tubes are manufactured using automated resistance welding equipment to ensure consistent stud spacing, strong weld integrity, in addition to reliable long-term performance. Every production batch is subjected to rigorous inspection procedures to meet customer specifications and applicable international standards.
- Manufactured from ASTM A213 T9 seamless alloy steel tubes
- Excellent high-temperature strength and creep resistance
- Increased external heat transfer surface through welded studs
- Improved gas-side heat transfer efficiency
- Reduced fouling and easier cleaning compared with plain tubes
- Uniform stud welding for reliable mechanical performance
- Suitable for high-pressure and high-temperature service
- Custom dimensions and stud configurations available
ASTM A213 T9 studded tubes are widely used in heat recovery systems where enhanced heat transfer and long service life are required, including:
- Waste Heat Boilers (WHB)
- Sulfur Recovery Units (SRU)
- Petrochemical processing plants
- Oil refineries
- Power generation plants
- Steel and metallurgical industries
- Cement production facilities
- Chemical processing equipment
- Heat recovery steam generators (HRSG)
- Industrial exhaust gas heat exchangers
Dimensions can be customized according to customer drawings and equipment design requirements.
| Item | Specification Range |
|---|---|
| Tube Standard | ASTM A213 |
| Base Tube Material | T9 (9Cr-1Mo Alloy Steel) |
| Tube Type | Seamless Tube |
| Outside Diameter | 25.4 mm - 88.9 mm |
| Wall Thickness | 2.5 mm - 12 mm |
| Tube Length | 3000 mm - 18000 mm |
| Stud Diameter | 8 mm - 20 mm |
| Stud Height | 10 mm - 25 mm |
| Stud Pitch | Customized according to design requirements |
| Stud Material | Carbon Steel, Alloy Steel, Stainless Steel Available |
| Manufacturing Standard | ASTM / ASME / EN Available |
| Element | Requirement (%) |
| Carbon (C) | ≤0.15 |
| Manganese (Mn) | 0.30-0.60 |
| Phosphorus (P) | ≤0.025 |
| Sulfur (S) | ≤0.025 |
| Silicon (Si) | 0.25-1.00 |
| Chromium (Cr) | 8.00-10.00 |
| Molybdenum (Mo) | 0.90-1.10 |
| Iron (Fe) | Balance |
| Item | Requirement |
| Tensile Strength | ≥415 MPa |
| Yield Strength | ≥205 MPa |
| Elongation | ≥30% |
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