E-Catalogue

Bimetallic G-Type Fin Tubes Manufacturer, Supplier & Exporter

What are Bimetallic G-Type Fin Tubes?

Bimetallic G-Type Fin Tubes is a heat transfer tube which is made by winding a fin strip onto a machined helical groove on the external surface of a base tube and then closing the groove mechanically over the base of fin to ensure that fin is reliably bonded to the wall. This type of construction offers excellent fin integrity and high thermal conductivity, which is highly desirable and efficient in high temperature conditions of industrial heat exchangers, boilers, condensers and economizers.

Bimetallic G-Type Fin Tubes

Bimetallic G-Type Fin Tubes are among the most efficient heat transfer solutions used across industries requiring superior thermal performance, long service life, and reliable operation under demanding temperatures. These fins are produced by mechanically joining an external fin material to a groove machined into the base tube. This forms an integral fin that has good thermal conductivity and fin attachment.

We manufacture and export Bimetallic G-Type Fin Tubes suitable for all types of heat exchangers, economizers, air coolers, condensers, boilers, waste heat recovery units and other process applications. Manufactured to international standards our finned tubes use advanced manufacturing techniques and can be fabricated from various combinations of materials for a range of operating conditions.

As an accredited Bimetallic G-type Fin Tube Exporter we manufacture customized finned tube products for power generation, petrochemical, oil and gas, HVAC, marine, fertilizer and chemical processing industries.

What Makes G-Type Finned Tubes Different?

Unlike L-Type Fin Tubes where the fin is tension wound around the tube surface, G-Type Finned Tubes utilize a groove embedding process. A precisely machined groove is cut into the outer surface of the base tube, and the fin strip is inserted into the groove before the tube material is rolled back over the fin root. This manufacturing method provides:

  •   Strong mechanical fin retention
  •   Improved heat transfer efficiency
  •   Better resistance to vibration
  •   Enhanced durability in industrial environments
  •   Reliable operation at higher temperatures
  •   Extended service life compared to standard tension-wound fin tubes

Because the fin is physically locked into the tube wall, G-Type Finned Tubes are widely preferred for demanding thermal applications where performance and reliability are critical.

Table of Content


How Bimetallic G-Type Fin Tubes Are Manufactured


Bimetallic G-Type Fin Tubes

Advantages of Bimetallic G-Type Fin Tubes


  •   Excellent Heat Transfer Performance: The embedded fin construction creates efficient thermal contact between the fin and base tube, significantly increasing heat transfer surface area.
  •   Superior Fin Retention: The fin is mechanically locked into the tube wall, reducing the risk of fin loosening during operation.
  •   High Temperature Capability: High-temperature bimetallic fin tubes can operate effectively at temperatures significantly higher than standard L-Type Finned Tubes.
  •   Longer Service Life: Strong mechanical bonding improves durability under vibration, thermal cycling, and fluctuating process conditions.
  •   Reduced Maintenance Costs: The robust construction minimizes downtime and maintenance requirements.
  •   Corrosion Resistance: Material combinations can be selected to withstand corrosive environments and aggressive process media.
  •   Improved Energy Efficiency: Enhanced heat transfer performance contributes to lower energy consumption and improved process efficiency.

Bimetallic G-Type Fin Tubes Specifications Chart

Parameter

Specification

Product Type

Bimetallic G-Type Fin Tubes
Finning Method
Embedded (Grooved) Fin Construction
Base Tube OD
15.88 mm to 63.5 mm (5/8" to 2½")
Base Tube Thickness
1.2 mm to 6.0 mm
Fin Height
8 mm to 16 mm
Fin Thickness
0.3 mm to 0.6 mm
Fin Pitch
2.1 mm to 6.0 mm
Fins Per Inch (FPI)
4 to 12
Tube Length
Up to 18 Meters
Operating Temperature
Up to 400°C
Fin Material
Aluminium, Copper
Base Tube Material
Carbon Steel, Stainless Steel, Alloy Steel, Copper, Copper Nickel, Titanium
Fin Attachment Method
Mechanically Embedded in Helical Groove
Corrosion Resistance
Excellent (Material Dependent)
Applicable Standards
ASTM, ASME, DIN, EN, BS
End Conditions
Plain End, Bevel End, Threaded End
Testing
Visual Inspection, Dimensional Inspection, Hydro Test, PMI Test, Fin Bond Test

Bimetallic G-Type Fin Tubes Material Combination Chart


Base Tube Material Fin Material
Carbon SteelAluminium
Carbon SteelCopper
Stainless Steel 304Aluminium
Stainless Steel 316Aluminium
Stainless Steel 321Aluminium
Stainless Steel 347Aluminium
CopperAluminium
Copper Nickel 90/10Aluminium
Copper Nickel 70/30Aluminium
TitaniumAluminium
Alloy SteelAluminium
InconelAluminium
MonelAluminium

Mechanical Properties Chart


Stainless Steel 316 Base Tube

Property Value
Tensile Strength515 MPa Min
Yield Strength (0.2% Offset)205 MPa Min
Elongation40% Min
Hardness≤ 217 HB
Modulus of Elasticity193 GPa
Density8.0 g/cm³
Thermal Conductivity16.3 W/m·K
Melting Range1370°C – 1400°C
Poisson's Ratio0.30

Aluminium Fin Material Mechanical Properties

Property Value
Tensile Strength90 – 150 MPa
Yield Strength35 – 120 MPa
Elongation10 – 25%
Density2.70 g/cm³
Thermal Conductivity205 W/m·K
Melting Point660°C
Hardness20 – 50 HB

Chemical Composition Chart


Stainless Steel 316 Base Tube (%)

Element Composition (%)
Carbon (C)0.08 Max
Manganese (Mn)2.00 Max
Silicon (Si)0.75 Max
Phosphorus (P)0.045 Max
Sulfur (S)0.030 Max
Chromium (Cr)16.00 – 18.00
Nickel (Ni)10.00 – 14.00
Molybdenum (Mo)2.00 – 3.00
Nitrogen (N)0.10 Max
Iron (Fe)Balance

Aluminium Fin Material (%)

Element Composition (%)
Aluminium (Al)99.0 Min
Silicon (Si)0.50 Max
Iron (Fe)0.50 Max
Copper (Cu)0.10 Max
Manganese (Mn)0.10 Max
Magnesium (Mg)0.10 Max
Zinc (Zn)0.10 Max
Titanium (Ti)0.05 Max

Common Material Combinations


As an experienced G-Fin Tube Manufacturer and Exporter, we offer various material combinations including:

Base Tube Materials

  •   Carbon Steel
  •   Stainless Steel 304
  •   Stainless Steel 304L
  •   Stainless Steel 316
  •   Stainless Steel 316L
  •   Copper
  •   Copper Nickel
  •   Titanium
  •   Alloy Steel
  •   Nickel Alloys

Fin Materials

  •   Aluminium
  •   Copper
  •   Copper Alloys

Popular combinations include: Carbon Steel Tube + Aluminium Fin, Stainless Steel Tube + Aluminium Fin, Stainless Steel Tube + Copper Fin, Copper Tube + Aluminium Fin, and Copper Nickel Tube + Aluminium Fin. The selection depends on process temperature, corrosion resistance requirements, and heat transfer performance objectives.

Applications of Industrial Embedded Finned Tubes


Industrial embedded finned tubes are extensively used wherever enhanced heat transfer is required.

  •   Heat Exchangers: Used to increase thermal efficiency while reducing equipment size.
  •   Air Cooled Heat Exchangers: Improve air-side heat transfer performance in refinery and petrochemical facilities.
  •   Boilers: Support efficient heat recovery and improved energy utilization.
  •   Economizers: Enhance boiler efficiency through waste heat recovery.
  •   Condensers: Provide improved condensation rates and better thermal performance.
  •   HVAC Systems: Widely used in cooling and heating equipment requiring efficient temperature control.
  •   Waste Heat Recovery Units: Maximize recovery of thermal energy from industrial exhaust streams.
  •   Petrochemical Plants: Suitable for demanding operating environments requiring reliable heat transfer solutions.
  •   Power Generation Facilities: Utilized in air heaters, heat recovery systems, and auxiliary equipment.

Why Choose ASTM/ASME G-Type Bimetallic Fin Tubes?


ASTM/ASME G-type bimetallic fin tubes are manufactured according to internationally recognized standards to ensure quality, reliability, and performance. Benefits include:

  •   Consistent dimensional accuracy
  •   Verified material traceability
  •   Enhanced operational safety
  •   Reliable thermal performance
  •   International project compliance
  •   Long-term durability

Our manufacturing and inspection procedures ensure every finned tube meets stringent industry specifications.

Why Customers Choose Us


Customers worldwide rely on our Finned Tube solutions because of our commitment to quality, engineering expertise, and responsive service.

Our Strengths

  •   Extensive manufacturing experience
  •   Custom-built finned tube solutions
  •   International quality standards
  •   Competitive pricing
  •   Fast delivery schedules
  •   Export-ready packaging
  •   Technical support and material selection assistance
  •   Global supply capabilities

Whether you require standard designs or project-specific solutions, our engineering team can help identify the most suitable finned tube configuration for your application.

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Request a Quote for Bimetallic G-Type Fin Tubes


Looking for a reliable Embedded fin tube supplier India for your next project? Our team can provide customized ASTM/ASME G-type bimetallic fin tubes engineered for maximum thermal performance, durability, and operational efficiency.

Contact us today for technical assistance, material recommendations, pricing, and fast project quotations.