| Customization: | Available |
|---|---|
| Certification: | CE |
| Customized: | Customized |
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Primary Standard: ASTM A213 (Seamless Ferritic and Austenitic Alloy-Steel Boiler Tubes)
Complementary Standards: ASME SA213 (Process), EN 10216-5 (EU Compliance).
| Parameter | Tolerance |
|---|---|
| OD Tolerance | ±0.10 mm (≤25.4 mm OD) / ±0.25 mm (>25.4 mm OD) |
| Wall Thickness Tolerance | ±10% (Minimum WT ≥1.65 mm) |
| Straightness | ≤1.5 mm/m |
Creep Resistance: TP347/TP348 with Nb/Ta stabilization prevents carbide precipitation at 600-800°C.
Corrosion Resistance: TP201/TP202 offer chloride stress corrosion cracking resistance (Cr/Ni ≥30%).
Thermal Cycling Stability: Low carbon content (TP347H: C ≥0.04%) ensures weldability and thermal fatigue resistance.
Chemical Composition (Key Elements):
| Grade | Cr | Ni | C | Nb/Ta |
|---|---|---|---|---|
| TP201 | 19% | 13% | ≤0.08% | - |
| TP202 | 18% | 10% | ≤0.08% | - |
| TP347 | 18% | 11% | ≤0.08% | Nb ≥8×C |
| TP348 | 18% | 11% | ≤0.08% | Ta ≥8×C |
Mechanical Tests:
Tensile Strength: ≥515 MPa (TP347/TP348)
Yield Strength: ≥205 MPa
Hardness: ≤192 HB (Annealed Condition).
Power Plants: Superheaters, reheaters, and steam headers.
Petrochemical: Cracking furnace tubes, reformer tubes.
Nuclear: Reactor coolant piping (ASME III Qualified).
Anti-Corrosion Measures: VCI (Volatile Corrosion Inhibitor) paper for marine shipments.
Traceability: Each batch includes Mill Test Certificates (MTC) with heat number.
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