Name: ASTM A335 P22 High Frequency Welded Serrated Spiral Fin Tube for Heat Exchangers & Boilers
Brand: YUHONG HOLDING GROUP CO., LTD
SKU: ASTM A335 GR.P5/ Gr.P9/ Gr.P11/ Gr.P22 HFW Fin Tube
Availability: InStock

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ASTM A335 P22 High Frequency Welded Serrated Spiral Fin Tube for Heat Exchangers & Boilers

ASTM A335 P22 fin tube

serrated spiral fin tube

high frequency welded fin tube

Place of Origin:

China

Brand Name:

YUHONG

Certification:

ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

Model Number:

ASTM A335 GR.P5/ Gr.P9/ Gr.P11/ Gr.P22 HFW Fin Tube

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Product Details

Highlight:

ASTM A335 P22 fin tube

serrated spiral fin tube

high frequency welded fin tube

Payment & Shipping Terms

Minimum Order Quantity

10PCS

Price

Negotiable

Packaging Details

Requirements/ Ply-wooden Case/ Iron Case/ Bundle with plastic Cap

Delivery Time

Depends on quantity

Payment Terms

T/T,L/C

Supply Ability

1000 Tons per month

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Product Description

ASTM A335 P22 High Frequency Welded Serrated Spiral Fin Tube

This high-performance engineered component is designed for superior heat transfer in extreme operating environments. It integrates the excellent high-temperature mechanical properties of ASTM A335 Grade P22 alloy steel with an advanced finned design for enhanced heat exchange efficiency.

Product Overview

The base tube is manufactured from seamless ferritic alloy-steel pipe specifically intended for high-temperature service. The addition of a continuous, serrated spiral fin via High Frequency Welding (HFW) technology dramatically increases the external surface area, resulting in significantly enhanced heat exchange efficiency compared to bare pipes.

The serrated fin design features small, regular cuts along the fin edge that disrupt laminar flow and promote turbulence in the surrounding fluid (typically gas or air), leading to even higher heat transfer coefficients. This makes it an ideal solution for industrial systems requiring efficient heat dissipation or recovery under high pressure and temperature conditions.

Standard Specification & Material Compliance

Primary Material Standard: Base tube conforms to ASTM A335/A335M for seamless ferritic alloy-steel pipe for high-temperature service
Grade Designation: Grade P22 (UNS K21590)
Material Classification: Low-alloy ferritic steel (2.25Cr-1Mo steel)
Fin & Welding: Spiral fin welded using High Frequency Welding (HFW) processes for strong, continuous metallurgical bonding

Chemical Composition of ASTM A335 Grade P22

The chemical composition provides the foundation for high-temperature capabilities:

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

Key Roles of Alloying Elements

Chromium (Cr): Enhances oxidation and corrosion resistance at elevated temperatures
Molybdenum (Mo): Increases high-temperature strength and creep resistance
Carbon (C): Provides fundamental strength with balanced weldability

Mechanical & High-Temperature Properties

Property	Typical Value / Description
Tensile Strength	≥ 415 MPa (60 ksi)
Yield Strength	≥ 205 MPa (30 ksi)
High-Temperature Performance	Excellent creep resistance and mechanical integrity up to 580°C - 600°C (1076°F - 1112°F)
Weldability	Good with proper pre-heat and post-weld heat treatment procedures

Product Applications

Power Generation: Heat recovery steam generators (HRSG), economizers, air pre-heaters
Petrochemical & Refining: Process gas heaters, charge air coolers, waste heat recovery units
Chemical Processing: Reactors, high-temperature process gas coolers/heaters
Other Industries: Metallurgical plants, pulp and paper recovery boilers, offshore platforms

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ASTM A335 P22 High Frequency Welded Serrated Spiral Fin Tube for Heat Exchangers & Boilers

ASTM A335 P22 fin tube

serrated spiral fin tube

high frequency welded fin tube

ASTM A335 P22 fin tube

serrated spiral fin tube

high frequency welded fin tube

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