What are jagged finned tubes?

2024-12-23Leave a message

Finned tubes are utilized to increase quick heat transmission while also achieving efficient and energy-saving heat exchange. Finned tubes differ from typical bare tubes in that they are made up of base tubes and fins. Fins facilitate heat transfer by increasing the tubes surface area. The volume of the equipment can be lowered while maintaining the same heat transfer effect.

What are jagged finned tubes?

Jagged finned tubes are heat exchangers with serrated fins. A specific number and spacing of grooves are carved on the fins edge using an extruded solid tooth fin tube. The fin tube is named after its serrated design.

Jagged Finned Tube

The structure of jagged-finned tubes is primarily divided into two parts: the base tube and the fins. The raw materials for these two sections are pipes, specifically steel pipes and aluminum pipes. Aluminum pipes are typically made in compliance with American standard ASTM B221. Because the base tube and fins are formed of different materials, extruded finned tubes are also known as bimetallic rolling fin tubes.

Aluminum has good ductility, a strong capacity to tolerate air corrosion, and excellent heat transmission properties, making it ideal for fins. The material for the base tube is mostly chosen based on the corrosion and pressure of the hot fluid, such as carbon steel, stainless steel, alloy steel, and so on.

Manufacturing Process of Jagged Finned Tube

⚑ Raw materials: steel and aluminum tubes.

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⚑ Surface treatment: clean the surface of the steel and aluminum tubes.

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⚑ Assembly: Insert the treated steel tube into the aluminum tube.

Assembly of base tube and aluminum tubes

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⚑ Extrusion molding: insert the assembled tube into the extruded fin tube machine to produce the extruded solid tooth fin tube.

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⚑ Jagged processing: According to customer requirements, utilize tools to form a jagged edge of the fin.

Specifications & Parameters

✔ Process: extruded + jagged

✔Material:

- Base tube: steel

- Fin: aluminum as per B221

✔Dimensions:

- OD: 12-32mm

- WT: 1-2mm

✔No. of serration: 12/24pcs

✔Width of segment: 4mm (generally)

Performances of Jagged Finned Tube

✔ Weight: Light

✔ Heat transfer performance: Excellent

✔ Mechanical strength: High

✔ Service life: Relatively long

✔ Corrosion resistance: Good

✔ Vibration resistance: Good

Applicable conditions of Extruded Jagged Finned Tube

Suitable conditions	Reason	Typical uses
Medium and low temperature environment	Stable performance, durable	Air conditioning, refrigeration, industrial heat exchanger
Weak/weakly corrosive environment	Natural oxidation resistance, can be enhanced by anodizing	Cooling towers, marine climate equipment
Lightweight demand	Low aluminum density, easy to move	Automotive radiator, aerospace thermal control system
Clean medium	Not easy to clog, suitable for medium flow rate	Heat pump, air cooler
Low vibration environment	Fatigue strength meets requirements	Indoor air conditioning, fixed equipment
High thermal conductivity demand	Aluminum has excellent thermal conductivity, suitable for efficient heat transfer needs	Compact heat exchanger, solar collector
Medium pressure environment	Can withstand medium fluid pressure	Refrigerant system, heat recovery equipment

The following conditions do not apply

Unsuitable applications	Reason	Typical examples
High temperature environment	Decrease in strength, deformation or melting	Industrial boilers, heat treatment furnaces
Strong acid/alkaline environment	Corrosion of oxide layer, resulting in damage to substrate	Acidic chemical media, high-alkali solution system
High pressure working conditions	Insufficient tensile and yield strength	High-pressure steam pipelines, pressure vessels
Abrasive fluid environment	Low hardness, susceptible to wear	Sand-containing water, abrasive medium transmission equipment
Extremely cold environment, such as below -100°C	Decrease in toughness, easy to be cold and brittle	Polar or deep-sea heat exchangers
High vibration environment	Low fatigue strength	Military equipment, high-speed train cooling system
Electrochemical environment	Prone to electrochemical corrosion	Copper-aluminum mixed heat exchange equipment

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