Home > Fin Tube >

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

Product Categories

Yuhong Group Co.,Ltd

Trust Seal

Verified Supplier

Credit Check

Supplier Assessment

Contact Now

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

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

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.

Contact Now

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

Product Tags: