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ASTM A335 P22 Alloy Steel Seamless Tube With 11-13CR HFW Fin Tube For Convection Coil

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ASTM A335 P22 Alloy Steel Seamless Tube With 11-13CR HFW Fin Tube For Convection Coil

Name: ASTM A335 P22 Alloy Steel Seamless Tube With 1113CR HFW Fin Tube For Convection Coil
Brand: yuhonng
Price: 1 USD

Wholesale ASTM A335 P22 Alloy Steel Seamless Tube With 11-13CR HFW Fin Tube For Convection Coil from china suppliers

Brand Name : yuhonng

Model Number : ASTM A335 P22

Certification : ABS,CCS,BV, LR, DNV, PED

Place of Origin : China

MOQ : 100kgs

Price : Negotiable

Payment Terms : T/T,L/C

Delivery Time : 7 days

Packaging Details : Ply-Wooden Packing with iron frame

Surface Treatment : Plain, Polished, Coated, etc.

Material : Alloy Steel, Stainless Steel, Carbon Steel, etc.

Fin Pitch : 2mm-20mm

Advantages : High Efficiency, Compact Design, Cost-effective

Size : Customized

Application : Heat Exchangers, Air Conditioning, Refrigeration, etc.

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ASTM A335 P22 Alloy Steel Seamless Tube With 11-13CR, HFW Fin Tube, For Convection Coil

1. Product Overview

The ASTM A335 P22 Alloy Steel Seamless Tube with 11-13% Chromium (Cr) HFW Fin Tube is engineered for high-efficiency heat transfer in extreme temperature and pressure environments. Combining the high-temperature strength of P22 alloy steel with the corrosion resistance of chromium-rich fins, this product is ideal for convection coils in boilers, heaters, and industrial thermal systems.

2. Material Standards & Chemical Composition

Base Tube: ASTM A335 P22 Alloy Steel

Element	Composition (wt%)	Standard Requirements
Carbon (C)	0.05–0.15	ASTM A335
Chromium (Cr)	1.90–2.60
Molybdenum (Mo)	0.87–1.13
Manganese (Mn)	0.30–0.60
Silicon (Si)	0.50 max
Phosphorus (P)	0.025 max
Sulfur (S)	0.025 max

Fin Strip: 11-13% Chromium Steel

Element	Composition (wt%)	Key Role
Chromium (Cr)	11.00–13.00	Enhances oxidation & corrosion resistance
Carbon (C)	0.08–0.15	Balances strength & weldability
Nickel (Ni)	≤0.50	Improves toughness
Manganese (Mn)	0.30–0.60	Supports hardenability

3. Mechanical Properties

Parameter	ASTM A335 P22 Base Tube	11-13Cr Fin Strip
Tensile Strength (MPa)	≥415	450–600
Yield Strength (MPa)	≥205	≥250
Elongation (% in 50 mm)	≥30	≥20
Hardness (HBW)	≤187	≤230
Max Operating Temperature (°C)	650	550 (continuous service)

4. Key Advantages

High-Temperature Durability
- P22 alloy steel withstands temperatures up to 650°C with superior creep resistance, ideal for superheaters and reformers.
- Chromium fins resist oxidation in flue gas and acidic environments.
Corrosion & Sulfidation Resistance
- 11-13Cr fins prevent sulfidation cracking in sulfur-rich atmospheres (e.g., refinery heaters).
Optimized Heat Transfer
- HFW fins increase heat exchange surface area by 4–6x, enhancing efficiency while maintaining low pressure drop.
Robust Welding Quality
- High-frequency welding ensures fin-to-tube bond strength ≥85% of base metal, validated by shear testing.
Cost-Effective Solution
- Combines the high-temperature performance of P22 with the corrosion resistance of Cr steel, reducing downtime and maintenance costs.

5. Manufacturing & Quality Control

Base Tube Production
- Seamless manufacturing via hot extrusion or rotary piercing, compliant with ASTM A335.
- Heat treatment: Normalized at 900–940°C, tempered at 690–730°C for optimal microstructure.
Fin Welding Process
- HFW fin attachment: Welding speed 8–25 m/min, frequency 200–450 kHz.
- Post-weld stress relief (PWHT) at 600–650°C to eliminate residual stresses.
Testing & Certification
- Non-Destructive Testing (NDT): 100% UT/RT on base tube; PT/MT on welds.
- Hydrostatic Testing: 1.5x design pressure (ASME B31.1 compliant).
- Certificates: ASME Section II, EN 10204 3.1, and PED 2014/68/EU.

6. Applications

Industry	Use Cases
Power Generation	Boiler convection sections, superheaters, and economizers in coal/gas plants.
Petrochemical	Cracking furnaces, hydroprocessing heaters, and sulfur recovery units.
Industrial Heating	Thermal fluid heaters, waste heat recovery coils, and process air preheaters.
Chemical Processing	High-temperature reactors and reformer tubes in ammonia/methanol plants.

7. Comparison with Alternatives

Feature	ASTM A335 P22 + 11-13Cr HFW Fin Tube	Carbon Steel Fin Tube	Stainless Steel 321 Fin Tube
Max Temperature (°C)	650	400	850
Sulfidation Resistance	Excellent (Cr-enhanced)	Poor	Moderate
Cost	Moderate	Low	High
Typical Lifespan	12–18 years	5–8 years	15–25 years

ASTM A335 P22 Alloy Steel Seamless Tube With 11-13CR HFW Fin Tube For Convection Coil

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