ASTM A312 TP347 Serrated Spiral High Frequency Welding Finned Tube For Condensers
Price:
Negotiable
MOQ:
200-500KGS
Delivery Time:
45-75 Days (Depend on Customer's Requirement)
Brand:
YUHONG
Product Description
ASTM A312 TP347 Serrated Spiral High Frequency Welding Finned Tube For Condensers
Product Specifications
| Attribute | Value |
|---|---|
| Product Name | HFW Serreted Finned Tube |
| Bare Tube Specification & Material | ASTM A312 TP347 |
| Fin Height | 10~50mm |
| Fin Thick | 0.3~3mm |
| Highlight | ASTM A312 Finned Tube, Serrated Spiral Finned Tube, Heat Exchanger Finned Tube |
| Application | Power Plants, Chemical Plants, Oil Refineries |
Product Description
What is ASTM A312 TP347 Serrated Spiral HFW Finned Tube?
ASTM A312 TP347 Serrated Spiral High-Frequency Welding (HFW) Finned Tube is an advanced heat transfer solution for extreme oxidation and creep resistance. It combines a seamless stabilized austenitic stainless steel base tube (ASTM A312 TP347) with helically wound serrated spiral fins bonded via high-frequency resistance welding. The serrated fin edges disrupt boundary layers, enhancing heat transfer by 35% vs. smooth fins, while the Nb-stabilized alloy resists intergranular corrosion up to 870°C (1,598°F). Ideal for high-ash flue gases and cyclic thermal shock services.
Chemical & Mechanical Properties
Chemical Composition (Per ASTM A312/A999)
| Element | TP347 Base (%) | Critical Function |
|---|---|---|
| Chromium (Cr) | 17.0-20.0 | Oxidation shield |
| Nickel (Ni) | 9.0-13.0 | Austenite stability |
| Niobium (Nb) | 10×C min* | Intergranular corrosion resistance |
| Carbon (C) | ≤ 0.08 | Weldability |
| Manganese (Mn) | ≤ 2.00 | Strength |
| Silicon (Si) | ≤ 1.00 | Deoxidation |
| Phosphorus (P) | ≤ 0.045 | Purity |
| Sulfur (S) | ≤ 0.030 | Machinability |
Mechanical Properties (Post-Weld Annealed)
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength | ≥ 205 MPa |
| Max Service Temp. | 870°C (1,598°F) |
| Hardness | ≤ 192 HB |
| Fin Bond Shear Strength | > 140 MPa |
| Oxidation Resistance | ≤ 0.1 g/m²*h (980°C/air) |
Key Applications & Competitive Advantages
- Waste-to-Energy Boilers: Superheaters in municipal waste incinerators (resists KCl/ZnCl₂ corrosion)
- Refinery Heaters: Convection sections for vacuum residue upgrading
- Chemical Processing: Cracked gas heat exchangers in ethylene plants
- Power Generation: SCR duct heaters for coal-fired units (handles fly ash erosion)
- Cement Plants: Preheater exhaust gas economizers
Why Engineers Specify TP347 Serrated HFW Tubes
Zero Carbide Precipitation: Nb stabilization prevents sensitization in 425-870°C range
Ash Self-Cleaning: Serrated fins reduce fouling by 50% (per EPRI study)
Thermal Fatigue Resistance: 2x longer life than TP304H in cyclic duty
Customization: Fin height (12-25mm), serration depth (1-3mm), FPI (3-8)
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Company
YUHONG HOLDING GROUP CO., LTD
Location
20 Floor, No.1 New World Building, NO.1018 Min'an Road, Yinzhou District, Ningbo, China, ZIP:315040
Contact Person
Sales Dept.