Spiral Tube Professional Spiral Copper Finned Aluminium Tube for Heat Exchanger

• Customization: Available
• Certification: CE, ISO
• Customized: Customized
• Model NO.: finned tube
• Surface Treatment: Natural
• Fuel: Oil
• Range of Applications: Power station
• Type: Boilers Head
• Marketing Type: Ordinary Product
• Model: Customer′s Drawing
• Voltage: 380V
• Fin Material: Aluminum Fin
• Place of Origin: Cangzhou China
• Transport Package: Standard Seaworthy Packing
• Specification: Fin Tube
• Trademark: datang
• Origin: China
• HS Code: 73059000
• Production Capacity: 800000ton/Year
• Package Size: 1.00cm * 1.00cm * 1.00cm
• Package Gross Weight: 100.000kg

Product Description

High-frequency welded spiral finned tube is one of the most widely used spiral finned tubes, and is now widely used in power, metallurgy, waste heat recovery in the cement industry and petrochemical industries.

The high-frequency welded spiral finned tube is to use the skin effect and proximity effect of high-frequency current to heat the outer surface of the steel strip and the steel tube until the plastic state or melting, while the steel strip is wound around the steel tube, under a certain pressure of the winding steel strip.

Finish welding. This high-frequency welding is actually a solid-phase welding. Compared with methods such as inlay, brazing (or integral hot-dip galvanizing), it is more advanced in terms of product quality (high welding rate of fins, up to 95%), productivity and automation.

Finned tubes are the main components of heat exchangers.

They are a series of tubes where fins have been added on the outside to increase the contact area with the outside fluid, to exchange heat and between the fluid inside the tube and the fluid outside the tube.

Finned tubes are elongated aluminium cladded carbon steel flat tubes with brazed aluminium fins.

Multiple types and shapes of finned tubes exist including round tubes, oval tubes, or flat tubes.

Flat tubes, made of aluminium clad carbon steel tubes with aluminium brazed fins, are the state of the art for power plant air cooled condensers.

Technical Specifications for Monometalic Extruded Finned Tubes:

Tube Code	D	d	dw	P	Fins per Inch
	mm	mm	mm	mm	Nos.
MM-38-20-16-2.8	38	20	16	2.80	9
MM-38-20-16-2.5				2.54	10
MM-38-20-16-2.3				2.30	11
MM-51-29-25-3.6	51	29	25	3.62	7
MM-51-29-25-3.1				3.17	8
MM-51-29-25-2.8				2.80	9
MM-51-29-25-2.5				2.54	10
MM-51-29-25-2.3				2.30	11
MM-57-33-29-3.6	57	33	29	3.62	7
MM-57-33-29-3.1				3.17	8
MM-57-33-29-2.8				2.80	9
MM-57-33-29-2.5				2.54	10
MM-57-33-29-2.3				2.30	11
MM     :   Monometalic Extruded Finned Tubes
D       :   Fin outer diameter
d       :   Root diameter
dw     :   Tube ID
P       :   Fin pitch

 

Items	Code	Dimensions	Tolerances
Tube outside diameter	D1	Φ25~Φ219 mm	±0.2 mm
Fin outside diameter	D2	Φ37~Φ279 mm	±0.75 mm
Fin pitch	M	4~90 mm	±0.2 mm
Fin height	H	6~30 mm	±0.75 mm
Tube thickness	δ1	2~16 mm	±0.15 mm
Fin thickness	δ2	0.8~2.5 mm	±0.1 mm
Unfinned tube ends length	L1	customized	±1‰*L1 mm
Unfinned tube ends length	L2	customized	±1‰*L2 mm
Maximum tube length	L	0.5~25 m	±1‰*L mm