ASTM A179 ASME SA179 G-TYPE EMBEDDED FIN TUBE WITH ALUMINUM FINS FOR HEAT

ASTM A179 ASME SA179 G-TYPE EMBEDDED FIN TUBE WITH ALUMINUM FINS FOR HEAT EXCHANGERS

The G-Type embedded fin tube is a high-efficiency heat transfer component designed for demanding industrial applications including air-cooled heat exchangers, condensers, economizers, and heat recovery systems. This product features a seamless ASTM A179 low-carbon steel base tube with aluminum fins mechanically embedded into a precisely machined helical groove on the tube surface. The "G-Type" or embedded fin design involves a fin strip wound into a machined helical groove on the base tube and secured by the raised metal, ensuring a permanent mechanical bond with outstanding heat transfer efficiency and mechanical durability.

Base Tube Material – ASTM A179 / ASME SA179

ASTM A179 / ASME SA179 is a specification for seamless cold-drawn low-carbon steel tubes intended for tubular heat exchangers, condensers, and similar heat transfer apparatus. The material is chosen for its consistent quality, good ductility, and excellent thermal conductivity, making it ideal for the pressure-containing component of a heat transfer tube.

Chemical Composition of Base Tube (per ASTM A179 / ASME SA179)

Mechanical Properties of Base Tube (per ASTM A179 / ASME SA179)

Fin Material – Aluminum Alloy 1060 / 1100

The fins are manufactured from high-purity aluminum, typically Alloy 1060 or 1100, selected for outstanding thermal conductivity, lightweight properties, and corrosion resistance in atmospheric conditions. The aluminum fins provide superior resistance to oxidation and atmospheric corrosion.

Chemical Composition of Fin Material (Aluminum 1060 – Typical)

G-Type Embedded Fin Tube – Design and Manufacturing Process

The G-Type embedded design creates a strong, permanent mechanical bond through a specialized manufacturing process:

• Base Tube Preparation – Seamless A179 carbon steel tube provides pressure resistance and structural integrity

• Groove Machining – A helical groove (approximately 0.25–0.5 mm deep) is plowed into the tube wall

• Fin Embedding – Continuous aluminum strip is wound under tension; the fin base inserts into the groove, and displaced tube metal rolls back to lock the fin securely

• Mechanical Bond – This results in excellent metal-to-metal contact with minimal thermal resistance, ensuring fins stay firmly attached even under high temperatures, vibration, or thermal cycling

G-Type Embedded Fin Tube Specifications

Quality Control and Testing

Each G-Type embedded fin tube undergoes inspection and testing in accordance with applicable standards and customer specifications:

• Hydrostatic Test – Performed on base tube per ASTM A179 requirements

• Non-Destructive Examination (NDE) – Eddy Current Testing (ET) and Ultrasonic Testing (UT) as specified

• Dimensional Inspection – Verification of tube OD, wall thickness, fin height, fin thickness, fin pitch, and overall length

• Material Verification – Positive Material Identification (PMI) and full traceability to mill certificates

• Visual Inspection – Surface finish, groove quality, and fin integrity

• Flattening Test – To assess ductility and soundness

• Flaring Test – To evaluate resistance to deformation

Key Advantages of G-Type Embedded Fin Tubes

• Superior Heat Transfer Efficiency – The tight mechanical bond between the fin and tube maximizes heat exchange performance

• High Temperature Stability – Embedded fins stay locked with no air gap at 400°C, preventing thermal resistance decay

• Excellent Corrosion Resistance – Aluminum fins provide superior resistance to oxidation and atmospheric corrosion

• High Mechanical Rigidity – The "lock-in" design prevents fin loosening under turbulence and vibration, ensuring long-term structural integrity

• Optimized Heat Flux – Aluminum fins boost surface area up to 20 times the bare tube surface

• Customizable Design – Fin height, thickness, pitch, and materials can be adjusted per customer requirements

Typical Applications for ASTM A179 G-Type Embedded Fin Tube

G-Type embedded fin tubes are widely used in applications requiring high heat transfer efficiency in demanding environments:

• Air-Cooled Heat Exchangers (ACHE) – Petrochemical and refinery air coolers

• Condensers – Power plant and industrial condensers

• HRSG Boiler Economizers – Heat recovery steam generator systems

• Superheaters – Power generation and steam systems

• Waste Heat Recovery – Heat recovery systems for medium-temperature flue gas

• Radiators – Industrial cooling systems

• Charge Air Coolers – Turbocharger air cooling systems

• HVAC Systems – Chilled water systems, heat pump systems, and air conditioning systems

• Chemical Processing – Heating and cooling of chemicals, process fluid, and gases

• Power Generation – Steam generators, boilers, and heat-recovery steam generators

Documentation

Each shipment is supplied with complete documentation including:

• Mill Test Certificates (EN 10204 Type 3.1)

• Dimensional inspection reports

• Hydrostatic test reports

• NDE reports (if applicable)

• Heat treatment records (if applicable)

For a rapid quotation on ASTM A179 G-Type Embedded Fin Tube, please provide the following information:

• Quantity (number of pieces or weight)

• Base tube outside diameter, wall thickness, and length

• Fin material (Aluminum 1060 / 1100 or other)

• Fin height, thickness, and pitch/spacing

• Finned length and unfinned sections (bare ends)

• End preparation (plain ends or beveled ends)

• Delivery period required