Knurled L Fin, Double Overlap Fin, L-Foot Finned Tube for Petroleum, Chemical and Petrochemical Industries

Product Description

Company Profile

DATANG STEEL PIPE Co., Ltd is a reputed processor and wholesaler that export to global markets for 17 years.

You will find a extensive range of Finned tubes,Fin tube heat exchanger,Air cooler,Radiator,Economizer,Condenser, Vaporizer/evaporator in Datang.
We have a large amount of spot inventory: high quality carbon steel seamless pipe, ERW pipe, SSAW pipe, alloy steel pipe, etc. The pipe fittings and flanges are also available.
Welcome to visit our factory and looking forward to cooperate with you.

Production Line

We have a professional sales and technical team.
We design solutions and provide product cunstomization for you.

Now we have production facilities for manufacturing various types of finned tubes as mentioned below,
High Frequency Welded Fin Tube(Including Serrated Finned Tube) (8 lines)
Laser Welding Finned Tube (5 lines)
Extruded Finned Tube (Bimetallic Fin Tube&Integral Monometallic Low Fin Tube)(10 lines)
'G'Type Fin Tube (Embedded Finned Tube),'L' 'LL' 'KL' Type Fin Tube (Wrap Around Finned Tube) (6 lines)
 

Product Parameters

L-Foot Finned Tube

 

Highly efficient yet cost effective,L-footed finned tubing offers maximum heat transfer at lower temperatures. The unique L-shaped design holds fins rigidly to withstand heat cycling and high velocity air vibration.

The L-Foot Finned Tube can also be offered in following variations to the Fin:

 

Knurled Fin - An interference fit type fin with mechanical knurling of the fin material to the tube wall surface.

LL Fin - Double Overlap fin(The double LL) coverage provides a double strip thickness coverage of the entire base tube.

Perforated L Fin - This enhancement of the fin face creates "tear drop" slits around the helix that break up air flow.

 

L-Foot Fin / Wrap-On Fin

L-Foot Tension Wound Finned Tubes also known as Wrap-On Finned Tubes, are used in applications where temperatures do not exceed about 300 degrees Fahrenheit in other words for low-temperature application where some degree of tube wall protection is required. L-Foot tension wound finned tubes consist of thin aluminium fin strip tightly wound helically around the tube circumference. A "foot" is first formed on one side of the fin strip (hence the name L-Foot). The strip is then wound tightly around the tube, with the foot bearing on the tube outer surface. The short horizontal limb of each L is in contact with the base-tube surface to cover it completely. Tension in the fin strip as it is wrapped around the tube serves to seat the fin foot forcefully on the tube, and to hold the fin firmly in place. L-footed finned tubing offers maximum heat transfer at lower temperatures. The unique L-shaped design holds fins rigidly to withstand heat cycling and high velocity air vibration. This fin offers a certain degree of atmospheric protection of the tube wall against corrosion. The broad contact surface between the tube and the finning enhances heat transfer. This fin design is highly efficient yet cost effective.

 

The ends of the fins are stapled to prohibit the aluminium fin from unravelling, and loosing the contact between the fin foot and the tube. This contact is critical to the operation of the air cooler, since the heat is transferred from the tube wall, through the fin, to the surrounding ambient air.

 

Advantages:

Suitable for low-temperature application

The finning type is the most cost effective method compared to the others.

The failed fins can be easily removed during production and bare tube can be used again for finning.

There is no need for make a helical grove over the core tube.

It is possible to place the fins on a very thin-walled tube with is particularly desirable when using expensive alloys as core tube.

The tube can withstand a temperature of up to 130°C without the risk of atmospheric corrosion or thermal stress.

 

Application:

Oil and gas refineries

Petroleum, chemical and petrochemical industries

Natural gas treatment

Steel making industry

Power plants

Air conditioning

Compressor coolers
 

KL Footed Fin / Knurled L Footed Fin

The KL fin is also known as the knurled L fin. This finned tube is almost identical to the Wrap-On fin and is made using both Wrap-On and Embedded techniques. The fins are made from strips that have been prepared into a L shape that is comparable to the L type, then rolled into a taper that causes it to curl. It is then helically wound onto the tube in a continuous loop under tension. The tube is hugged by the fin. A spinning tool knurls the base tube, and then the foot of the fin is knurled into the knurling of the base tube, resulting in a tight bond and improved thermal performance.

 

The foot of one fin bumps up against the next fin if the correct fin strip is utilised, and there is no space between the fins. This helps to protect the tube from corrosion. In a similar way to L fins, the fins are attached at each end to prevent unwinding. In applications involving metal, KL -Foot tension wound finned tubes are typically employed. Up to 320°C (608°F) maximum operating temperature
 

Advantages:

Corrosion-resistant Tubes

Vibration resistance

It can withstand temperatures of up to 320°C (608°F).

High thermal performance and stress resistance combined with protection from air corrosion is a one-of-a-kind combo.

Any form of finned tube can be replaced with KL.

 

LL-Foot Fin / Overlapped L

 

The fins are created from strips in a similar way to the L type except that the foot is prepared into a carefully controlled stepped double L shape, rolled into a taper that allows it to curl. The LL-Foot Fin - Overlapped L is next helically coiled onto a tube under tension. The fin clings the tube, with one fin overhanging the foot of the next fin and the base tube completely covered. The tube is well protected from corrosion as a result of this. In corrosive settings, this form of tube is frequently used as an alternative to the more expensive extruded type fin.

 

Fins are secured at each end in the same way that L fins are. The LL-type fin tube is suitable for temperatures of up to 350 degrees Fahrenheit (177C degree).

parameters

PRODUCT	TYPE	TUBE MATERIAL	FIN MATERIAL	TUBE SIZE	FIN SIZE
Heat Exchanger Finned Tube	Extruded Fin Tube	All Kind of Material can be applied	Aluminum A1100	15.88~50.8	7~11.5FPI
					Fin Height Max 16mmH
	L-Foot Fin Tube	All Kind of Material can be applied	Copper C1100, C1220	12.70~50.8	7~11.5FPI
	(Wrap On Type)				Fin Height Max 16mmH
	G-Fin Tube (Embedded Type)		Aluminum A1100, A1050, A1060
	High Frequency Welded Finned Tube	A179 Carbon Steel Tube	Carbon Steel Tube	12.70~160	1.5~7FPI
		Stainless Steel Tube	Stainless Steel Tube		0.8~3.2mm. Thickness
		Alloy Steel Material	Alloy Steel Material
	Integral Copper & Copper Alloy High Finned Tube	C12200, C11000, C70600	C12200, C11000, C70600	15.88~22.23	5~9FPI
					Max 12mm. H
	Oval Finned Tube	Carbon Steel Tube	Carbon Steel Tube	All Size Available	5~15FPI
		Stainless Steel Tube	Stainless Steel Tube
		Alloy Steel Material	Alloy Steel Material
		Copper & Copper Alloy Tube	Copper & Copper Alloy Tube
Monometallic Fin Tube	Low Fin Tube	Carbon Steel, stainless steel, titanium, copper, brass, nickel alloy, etc.	--	9.52~40	12, 16, 19 28 FPI, etc.
	Turbo-C Tube
	Turbo-E Tube
	Corrugated Tube	All Kind of Material	--	6.35~40	2~9FPI

We offers different finned tubes: tension wound finned tubes, embedded finned tubes and extruded finned tubes.

 

Tension wound finned tubes are formed by winding a strip made of aluminium or copper around the tube under tension. The strip winding technology provides different types of fins: L-Fin, LL-Fin, KL-Fin.

 

Embedded fins (G-Fins) are made by winding aluminium or copper strip into a helical groove machined on the outer surface of the tube.

Tension wound finned tubes, embedded finned tubes and extruded finned tubes are main devices for air coolers and the common application fields are:

 

Heat exchangers for power plants (electric, nuclear, thermal and geothermal power plants)

Steam condensate systems

Chemical and petrochemicalindustry

Food processing plants and refrigeration technology

Industrial (steel mills, incinerators, gas compression facilities)

Application

Aftercoolers, air coolers, air heaters, charge air chillers, condensers, convection heaters, electric heaters, evaporators, fluid coolers, gas coolers, heat pipes, hydrogen coolers, industrial tumble dryers, intercoolers, immersion heaters, oil coolers, radiators, refrigeration, solvent recovery and steam to air heat exchangers.

 

Detailed Photos

Customer Tour&Cooperation

Customer Inspection

Testing&Certifications

FAQ
 
Q1:Are you a factory or trade company?
A1: A Factory and A subsidiary international trade company for export.

Q2: What can you provide?
A2: Our company is a professional manufacturer for Radiator and Heat Exchanger Equipment and various Fin Tubes.

Q3:Where is your factory?
A3:Our company is located in Cangzhou city, Hebei province, China, which is well equipped with kinds of machines.

Q4: How do you control quality?
A4: Inspection & Guarantee Certificate is supplied with shipment, and the Third Party Inspection is available.

Q5: What are the advantages of your company?
A5: We have many professional and technical personnel, more competitive prices and better after-dales service than other companies.

Q6: Can you arrange the shipment?
A6: Sure, we can help you with the shipment. We have forwarders who have cooperated with us for many years.

Q7: How about the delivery time?
A7: It is based on the order, normally within 30 days after receiving your advance payment.

Q8: Can you provide sample?
A8: Small samples in store can be provided for free.
 
Please contact me for more info today!