Product Details
SA214 ERW Carbon Steel , OD25.4X1.5WT KL Type Aluminum
Refrigeration Tube
Detail:
Protection of Ends
Both bare ends of Knurled Footed Fin Tubes shall be Zinc or
Aluminum metalized applied by an electro spray arc system coating.
Application of SA214 ERW Tubes: For high, middle, low pressure boiler and pressure purpose
Surface treatment: Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting
General KL Type production capacity | General specifications of KL Type fin tubes |
Finning Facility: 7 finning machines; Daily capacity up to 5000 meters; | Tube OD: 50.8mm max. Tube Length: 18,000mm max. Fin Height: 16.5 mm max. Fin Thickness: generally 0.4mm ~0.6mm Fin Pitch: 2.1 mm (12FPI) min. |
Description:
Manufacturing process
The fin strip (normally aluminum) is folded into an ‘L’ shape and
wound on to the base tube surface under tension. The surface of
base tubes must be knurled before tension.The feet of the fins are
joined together and cover the finned surface.
Acceptance Criteria
API Standard 661(Air-Cooled Heat Exchangers for General Refinery
Service) or the delivery conditions (TDC) of clients.
Quality Test
The Overlapped Knurled Footed Fin Tubes quality is assured by
hydrostatic or pneumatic tests, eddy current tests and tensile
tests in order to verify the mechanical bonding between inner and
outer tubes.
Accessories of KL type fin tubes
Tube Support Box, Clamp or Spacer Box (Materials: Aluminum, Zinc or
Stainless Steel).
Delivery condition
Tube ends are square cut, free burrs, internally dried and air
blown clean, externally coated with varnish at both ends of
Overlapped Knurled Footed Fin Tubes.
The desiccants are put into each package for continental
transportation as well.
Applications:
The common application fields are:
- Heat exchangers units for power plant(electric, nuclear, thermal
and geothermal power plants);
- High corrosive systems (condensers, evaporators, sea water
desalinations, fertilizing, urea systems, ammonia, gas, corrosive
acids);
- The petroleum, chemical and petrochemical industries;
- The food processing and refrigeration industries;
- Natural gas treatment;
Specifications:
Knurled footed tube is combined with two different materials.
Items | General Materials | Popular ASTM Materials |
Core Tube Material | Carbon steel, Low-alloy steel, Stainless steel, Brass, copper, Cooper-nickel alloys, Aluminum bronze, Nickel alloys. | 1. Carbon Steel: A179, A192,SA210 Gr A1/C,A106 Gr B 2. Stainless Steel: TP304/304L,TP316/TP316L 3. Copper:UNS12200/UNS14200/UNS70600, CuNi70/30,CuNi 90/10 4. Titanium: B338 Gr 2 |
Fins Material | Aluminum & Copper. | 1. Aluminum(Alu.1100,Alu.1060) 2. Copper. |
All dimensions are in Inches and specification upon your requests. |
Tube OD | Fin Height | Fin Thickness | Fins per Pitch(Density) |
5/8 | 3/8,1/2 | .015/.016/ .020 | 6, 7, 8, 9, 10, 11, 12 |
3/4 | 5/8,1/2 | .015/.016/ .020 | 6, 7, 8, 9, 10, 11, 12 |
1 | 5/8,1/2 | .015/.016/ .020 | 6, 7, 8, 9, 10, 11, 12 |
1 1/4 | 5/8,1/2 | .015/.016/ .020 | 6, 7, 8, 9, 10, 11, 12 |
1 1/2 | 5/8,1/2 | .015/.016/ .020 | 6, 7, 8, 9, 10, 11, 12 |
Please email for us for more information. |
Competitive Advantage:
- We have more than 10,000 square meters workshop, including 7
finning machines, daily capacity up to 5,000 meters.
- The Knurled Footed Finning machines are designed and assembled by
ourselves and we can offer you finning machines and all accessories
etc...
- This method of manufacturing KL Footed Type enables us to place the
finning on a very thin-walled tube with is particularly desirable
when using high value alloys (titanium, stainless, copper,
nickel).The tube can withstand a temperature of up to 150°C without
the risk of atmospheric corrosion or thermal stress.
- KL TYPE fin tubes: the knurling process is strengthened the
adhesion and reduce the tendency for fin loosening; and it is
preferred when used in slightly more aggressive conditions. Maximum
operating temperature: 250°C.
- After wrapped the fin strip, the fin foot is also knurled on the
base tube to increase the bonding between tube and fin. For this
reason, KL type of fin construction ensures better heat transfer
characteristics than in the case of type L and LL.

Company Profile
JIANGSU RELIANCE THERMAL EQUIPMENT CO., LTD
About Reliance
Jiangsu Reliance Thermal Equipment Co., Ltd is all about thermal transfer finned tubes products. We have a
long-term fabrication and supply experience in the business of FINING MACHINES and FINNED TUBES used in air-cooled heat exchanger, economizers, boilers, gas
turbines, refining and petrochemical industries ect.
Advantages
- One-stop manufacturer shop from core tube supply to fin tube
machines
- ISO 9001:2015 certified company
- Experienced and dedicated management and qualfied manpower
- Quickest response, competitive price, highese quality and shortest
schedule
- Tube stock availability for general grades of carbon steel and
stainless steel
- Technical support services for fin tube machines and replacement
accessories
FINNED TUBES PRODUCTS & SERVICE AVAILABLE
I. Mechanical-forming thermal-transfer tubes |
▲ DR type - Extruded high fin tube (solid and serrated fins) ▲ L type - Tension wound spiral fin tube ▲ LL type - Overlapped footed spiral fin tube ▲ KL/KLM type - Tension wound knurled footed fin tube ▲ G base type - Embedded fluted fin tube ▲ Low Fin type - integral low fin tube (knurled option) ▲ I type - Crimped spiral fin tubes ▲ Corrugated tube, spiral tube, U tube bundles ▲ Elliptical Finned Tubes |
2. Welding-forming thermal-transfer tubes |
▲HFW type - ERW High frequency resistance welding fin
tube(Solid & Serrated Fins) ▲H/HH type - DC welding square or rectangular fin tube) ▲Studs type - ERW studded tube) ▲Longitudinal welding fin tube (standard ,perforated,cut &
twist) ▲Single Row Flat finned tube |
3. Others service on request |
▲Elbows, bends, U-tube, tube swaging ▲Tube spacer box (Material: Stainless Steel,
Aluminum,Galvanized/Zinc) |
Fabrication Capacities
(1) Fourteen extrusion fining lines, daily capacity around 15,000 meters
(2) Five type L/LL/KL fining lines, daily capacity around 5000
meters
(3) Seven G- base fining lines, daily capacity around 7000
meters
(4) Two ERW studding lines, daily capacity around 80000 studs
(5) Four ERW High Frequency Spiral fining lines, daily capacity
around 30 tons
(6) Three bending machines, maximum capacity 76X4
(7) Five DC ERW H/HH fining lines, daily capacity around 20 tons
(8) One PLC high speed punch presser
Reliance have become a qualified manufacturer and reliable supplier for
high-quality thermal transfer finned tubes used in air-cooled heat
exchanger,economizers,boilers,gas turbines,refining and
petrochemical industries ect.
If you are interested in any of our products, please do not
hestitate to contact us @reliancemfg@126.com