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Alloy Steel Seamless Tube ASTM A335 P22 HFW Fin Tube For Furnace And Heater

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Alloy Steel Seamless Tube ASTM A335 P22 HFW Fin Tube For Furnace And Heater

Name: Alloy Steel Seamless Tube ASTM A335 P22 HFW Fin Tube For Furnace And Heater
Brand: Yuhong
Price: 1 USD

Quality Alloy Steel Seamless Tube ASTM A335 P22 HFW Fin Tube For Furnace And Heater wholesale

Brand Name : Yuhong

Model Number : ASTM A335 P22

Certification : ABS, BV, DNV, CCS, LR

Place of Origin : China

MOQ : 100kgs

Price : Negotiable

Payment Terms : TT, LC

Delivery Time : 7days

Packaging Details : plastic woven bags, ply-wooden case with iron steel case

Base Pipe Material : P9, P22

Application : Boiler, Economizer

Length : Max.: 34m/pc

Welding Type : HFW , serrated

Production Process : Cold Drawn

Fin Wall Thickness : 0.8-3mm

Fin Material Grade : 11Cr

Fin Thick : 0.8mm-3mm

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Alloy Steel Seamless Tube ASTM A335 P22 HFW Fin Tube For Furnace And Heater

Product Overview

The ASTM A335 P22 HFW Fin Tube is a high-temperature alloy steel tube with high frequency welded (HFW) fins, designed for use in industrial furnaces, heaters, and boilers. The P22 alloy offers superior thermal strength, oxidation resistance, and creep resistance, making it suitable for continuous operation under extreme heat and pressure.

Chemical Composition

Base Tube – ASTM A335 P22

Element	Composition (%)
Carbon (C)	0.05–0.15
Manganese (Mn)	0.30–0.60
Phosphorus (P)	≤ 0.025
Sulfur (S)	≤ 0.025
Chromium (Cr)	1.90–2.60
Molybdenum (Mo)	0.87–1.13

Fin Material – 11-13Cr Strip

Element	Composition (%)
Chromium (Cr)	11.0–13.0
Carbon (C)	≤ 0.08
Manganese (Mn)	≤ 1.0
Silicon (Si)	≤ 1.0
Phosphorus (P)	≤ 0.040
Sulfur (S)	≤ 0.030

Mechanical Properties

Base Tube – ASTM A335 P22

Property	Value
Tensile Strength	≥ 415 MPa
Yield Strength	≥ 205 MPa
Elongation	≥ 30%
Hardness	≤ 163 HB

Fin Material (Typical)

Property	Value
Tensile Strength	Approx. 450–600 MPa
Yield Strength	Approx. 250–350 MPa
Hardness	150–180 HB
Heat Resistance	Up to 600°C (continuous)

Advantages

Superior heat transfer performance for high-temperature gas environments.
High mechanical strength and creep resistance for prolonged service at elevated temperatures.
Excellent weldability and structural stability due to the seamless tube and HFW fin bonding.
Corrosion and oxidation resistance ensures durability in aggressive heating environments.

Applications

Convection Section

Location: The upper part of the furnace, after the radiant section.
Function: This section uses convection heat transfer from hot flue gases to heat up the working fluid (such as steam, oil, or gas) inside the finned tubes.
Why P22 Fin Tubes:
- High thermal conductivity of fins increases surface area → better heat transfer.
- Alloy P22 resists thermal stress, oxidation, and creep, making it ideal for continuous high-temperature exposure.

Sometimes in Radiant Section (Secondary Heating Area)

Conditionally, if the radiant section has lower radiant intensity or is partially shielded, these fin tubes may also be used here to recover radiant + convective heat.

Alloy Steel Seamless Tube ASTM A335 P22 HFW Fin Tube For Furnace And Heater Images

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