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ASTM A376 TP347H Stainless Steel Seamless Pipe Solid Fin Tube With Carbon Steel Fin Strip

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ASTM A376 TP347H Stainless Steel Seamless Pipe Solid Fin Tube With Carbon Steel Fin Strip

Name: ASTM A376 TP347H Stainless Steel Seamless Pipe Solid Fin Tube With Carbon Steel Fin Strip
Brand: Yuhong
Price: 1 USD

China ASTM A376 TP347H Stainless Steel Seamless Pipe Solid Fin Tube With Carbon Steel Fin Strip wholesale

Brand Name : Yuhong

Model Number : ASTM A376 TP347H

Certification : ABS, BV, CCS DNV, LR

Place of Origin : China

MOQ : 100kgs

Price : Negotiable

Payment Terms : L/C,T/T

Delivery Time : 7days

Packaging Details : ply-wooden case with iron frame

Type : High Frequency Welding Fin Tubes

Stud Pitch : As Per Client Request

Fin Thick : 0.8mm-3mm

Bare Tube Diameter : 16mm-219mm

Production Process : Cold Drawn

Ndt : Hydrostatic Test, PT

Fpi : 9-13

Welding Area : According to actual demand

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ASTM A376 TP347H Stainless Steel Seamless Pipe, Solid Fin Tube, With Carbon Steel Fin Strip

Introduction

This finned tube is made from ASTM A376 TP347H, a high-temperature austenitic stainless steel pipe, combined with carbon steel solid fins welded onto the outer surface using high-frequency welding (HFW). It is widely used in high-temperature heat exchangers, furnaces, and power plant economizers, where enhanced heat transfer and structural durability are critical.

Chemical Composition

Base Tube – ASTM A376 TP347H

Element	Content (%)
C	0.04 – 0.10
Mn	≤ 2.00
Si	≤ 1.00
P	≤ 0.040
S	≤ 0.030
Cr	17.0 – 19.0
Ni	9.0 – 13.0
Nb (Cb)	8 × C to 1.10
Fe	Balance

Fin Strip – Carbon Steel (e.g., Q235B)

Element	Content (%)
C	≤ 0.22
Mn	0.30 – 0.70
Si	≤ 0.35
P	≤ 0.045
S	≤ 0.050
Fe	Balance

Mechanical Properties

Property	TP347H BaseTube	Carbon Steel Fin
Tensile Strength	≥ 515 MPa	375–500 MPa
Yield Strength	≥ 205 MPa	≥ 235 MPa
Elongation	≥ 35%	≥ 20%
Hardness	≤ 95 HRB	≤ 120 HB

Advantages

Excellent High-Temperature Resistance: TP347H is stabilized with niobium for long-term strength at elevated temperatures.
Strong Weldability: High-frequency welding ensures firm bonding between tube and fins.
Enhanced Heat Transfer Surface: Solid fins increase surface area and improve heat dissipation.
Cost-Effective Fin Material: Carbon steel fins reduce costs while maintaining adequate thermal performance.
Mechanical Durability: Good resistance to thermal stress and mechanical vibration in fired heaters and economizers.

Applications

Used in high-temperature and high-pressure systems, such as:

Furnace Convection Sections
Power Plant Economizers
Petrochemical Reboilers
Heat Recovery Boilers
Heater Coils in Oil Refineries

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