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ASTM A312 TP347 Serrated Spiral High Frequency Welding Finned Tube For Condensers

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ASTM A312 TP347 Serrated Spiral High Frequency Welding Finned Tube For Condensers

Name: ASTM A312 TP347 Serrated Spiral High Frequency Welding Finned Tube For Condensers
Brand: YUHONG
Price: 1 USD

Wholesale ASTM A312 TP347 Serrated Spiral High Frequency Welding Finned Tube For Condensers from china suppliers

Brand Name : YUHONG

Certification : ABS, BV, ISO, ASTM, SGS

Place of Origin : China

MOQ : 200-500KGS

Price : Negotiable

Payment Terms : L/C,T/T,AT SIGHT

Supply Ability : According to Clients' requirements

Delivery Time : 45-75 Days (Depend on Customer's Requirement)

Packaging Details : Ply-wooden Cases with Steel Frames(both ends of pipes have plastic caps）

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

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1. 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.

2. 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)

3. 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.

4. 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).

ASTM A312 TP347 Serrated Spiral High Frequency Welding Finned Tube For Condensers

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