Embedded Fin Tube – Carbon Steel “G-Type” Finned Pipe for Heat Exchangers

Material

The product is a G-type embedded finned tube, consisting of a carbon steel base tube and mechanically embedded helical fins. The fins can be made from aluminum, copper, stainless steel, or carbon steel, depending on service temperature, corrosion conditions, and thermal conductivity requirements. The embedded structure ensures excellent fin-to-tube bonding and enhanced heat transfer efficiency.

Specification

• Base tube OD: 16 mm – 50.8 mm (5/8″ – 2″)

• Fin height: up to 16.5 mm

• Fin thickness: ~ 0.4 mm (typical)

• Fin pitch: as low as 2.1 mm (≈ 12 FPI)

• Tube length: up to 18 m

• Max operating temperature: up to 400 °C

Key Features

• High thermal efficiency – The embedded fin design guarantees excellent thermal contact and low resistance.

• Mechanical stability – The groove-locking process prevents fin loosening during thermal cycling.

• Compact design – High surface area per unit length improves exchanger performance.

• Durable and corrosion-resistant – Depending on the fin material, the tube can resist corrosion, oxidation, and fouling under harsh service.

Our Advantages

From an OEM and manufacturing standpoint, we address key customer concerns regarding performance, precision, and material flexibility:

1. Straightness & Tolerance Control
   Our advanced fin-embedding machines ensure straightness deviation ≤ 1 mm/m and consistent OD, fin height, and pitch accuracy for seamless bundle assembly.

2. Groove Precision & Wall Strength
   Fin grooves are precisely machined (0.2 – 0.3 mm depth) without compromising wall thickness, ensuring the tube maintains required pressure capacity.

3. Fin Material Options & Optimization
   We provide multiple fin material choices tailored to different working conditions:

   • Carbon Steel Fins – Economical, strong, ideal for medium-temperature, non-corrosive environments.

   • Aluminum Fins – Excellent thermal conductivity, lightweight, suitable for air coolers and low-temperature exchangers.

   • Copper Fins – Superior heat transfer and anti-microbial properties, ideal for HVAC and refrigeration.

   • Stainless Steel Fins – Excellent oxidation and corrosion resistance, suitable for high-temperature or corrosive gas applications.

4. Bond Integrity
   The fins are mechanically locked into the groove and rolled to ensure strong thermal bonding and long-term durability under vibration or thermal cycling.

5. Inspection & Quality Assurance
   Each tube undergoes chemical analysis, tensile and elongation testing, dimensional and NDT inspection (UT, RT, PT/MT), and hydrostatic testing.

6. Custom Engineering Support
   We offer tailored fin geometry, material combinations, and surface coatings to match each client’s specific heat transfer, temperature, and corrosion requirements.

Chemical Composition

Mechanical Properties

Standards

• ASTM A179 / ASME SA179 – Seamless cold-drawn low-carbon steel tubes

• ASTM A192 / SA210 / EN 10216-1 / GB 3087 – Equivalent standards for boiler and exchanger tubes

• GB/T 15386-94 – National standard for air cooler finned tubes

Applications

General:
Used in heat exchangers where one medium flows inside and another outside, maximizing air or gas-side heat transfer.

Typical industries:

• Petrochemical air coolers and waste heat recovery units

• Power generation (air-cooled condensers, economizers)

• Gas processing and LNG plants

• Steel and metallurgy gas coolers

• HVAC systems and refrigeration

• Flue-gas and waste-heat recovery units

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,

it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.

Who We are ?

-------A professional steel pipes materials inventor, manufacturer and solution provider
Torich International Limited is a professional manufacturer and exporter of steel pipes materials. It is an international marketing and sales company specialized in steel tubes, which holds the factories of Seamless Steel Tubes with Carbon and Alloy Steel Grade, Welded Precision Steel Tubes,DOM Steel Tubes, Seamless & Welded Stainless Steel Tubes with Nickel and Alloy Steel Grade.
Our factory was established since 1997, with the name of TORICH INTERNATIONAL LIMITED. The factories’ technicians are of great engineering experience in steel pipe industry for more than 20 years, which are in great command of production technology for Cold Drawing and Cold Rolling. So we have strong technician team and manufacturing capability.

What products we do?

------- Invent and produce various Precision Steel Pipes

Our steel pipes cover the following ranges:
Seamless Precision Steel Pipes

Bearing Steel Tubes
Welded Precision Steel Pipes, with DOM production
Seamless Heat Exchanger Steel Pipe
Seamless Boiler Steel Pipes

Honed Tubes

Hydraulic Cylinder Steel Tubes

Hydraulic Telescopic Cylinder Tubes
Seamless Structural Steel Pipes
Seamless Mechanical Steel Pipes
Seamless Alloy Steel Tubes & Pipes
Seamless Stainless Steel tubes
Welded Stainless Steel Tubes
Seamless Stainless Steel Tubes & Pipes
Welded Stainless Steel Tubes & Pipes
Seamless Carbon Steel Tubes & Pipes
Nickel Alloy Steel Tubes & Pipes

What TORICH do:
1. Producing Steel Tubes
2. Selling both on Domestic and International Market
3. Precisely Targeting Customers’ Requirement- Sourcing the right factory for right products for Customers

Products Application:
Oil Cylinders
Air Cylinder, 
Automotive Cylinder Liners
Boilers, Pressure Vessels
Shell & Heat Exchangers
Jack Lifting
Telescopic Systems
Pneumatic Cylinders
Agricultural Machineries

Size range is: 
O.D. 4-350mm, 
W.T. 0.5-30mm, 
Length: according to customer’s requirement and agreement
 

Steel Grade:
Carbon Steel Grade:
ST35.8, ST37.0, ST44, ST52;
E155, E195, E215, E235, E275, E355;
195GH, P235GH, P265GH, P195TR1, P195TR2, P235TR1, P235TR2, P265TR1, P265TR2;
SAE1010, SAE1020, SAE1026, SAE1035, SAE1045;

Carbon steel tube: SA178, A179, A192, A210, SA213, SA214, etc.
Alloy Steel Grade:
T2, T5, T9, T11, T12, T17, T21, T22, T91,T92, 15Mo3,16Mo3, 13CrMo44;
SAE4130, SAE4140, 40Cr, 40Cr4, 10CrMo910, 12CrMo910, 11CrMo910,
25CrMo4, 35CrMo, 35CrMo4, 42CrMo4, 34CrMo4, 20MnV, 20MnV6,20CrMn;
Carbon steel tube: A179,A192,A210,DIN17175,etc.

Bearing Steel Grades:
GCr15 52100 suj2 suj3 100Cr6 SKF3S SKF3S 20CrNiMo 8620H 4118H;

Nickel Alloy Grade:
N02200/2201, N04400, N06600, N06601, N06625, N06852, N06219, N06690, N08800/8810/8811, N08825, N08028, N08535, N08904, N08925, N08926, N010276, N06022, etc.

Austenitic/Super Austenitic Stainless Steel Grade:
304/304L, 316/316L, 314, 321, 347H, 316Ti, 316LMod, 317L/N, 310S, 253MA, 330, 904L, S31254, XM-19, etc. 

Ferrite/Martensite Stainless Steel Grade:
TP410, TP405, TP420, TP430, TP430Ti, TP403, TP409, TP444, TP439, TP446, etc. 

Duplex/Super Duplex Stainless Steel Grade:
S31803, S32304, S31500, S32550, S32750, S32760, etc. 
Corporate Culture:
We focus on Quality First, Quality Traceability, and Quality Stability!
We focus on Customer First, People First, and Quality-Oriented!
Success:
First factory started in 1997, in the name of Torich , now covers 50000 square meters of factory building, with more than 100employees, and over 45 million RBM assets.
In 2008, we started the company of Torich International Limited for international business and marketing.
Welcome partners from all over the world for long term cooperation!