Spiral Tension Wound Finned Tubes For Air-cooled Systems
Crimped fin tubes enhance heat transfer efficiency in air-cooled exchangers with spiral-wound fins.
Spiral Tension Wound Finned Tubes For Air-cooled Systems
Crimped fin tubes enhance heat transfer efficiency in air-cooled exchangers with spiral-wound fins. offering corrosion resistance, they are ideal for petrochemical, hvac, and power generation applications.
Crimped Fin Tubes, also known as spiral tension wound finned tubes, are advanced heat exchanger fins designed to maximize thermal transfer in air cooled exchangers. These tubes feature fins spirally wrapped under tension onto the base tube, typically without welding but with spot welding at the ends, ensuring a secure bond. Conforming to standards like ASTM A179, A213, and ASME SB338, crimped fin tubes are widely used in industries such as petrochemical, power generation, HVAC, and chemical processing due to their corrosion resistance and high heat transfer efficiency.
Manufactured through a specialized process, crimped fin tubes involve tension winding of fin material (aluminum, copper, carbon steel, or stainless steel) onto base tubes made of similar materials. The fin strip is pre-formed using rollers to create a crimped, wavy pattern, increasing the contact area and promoting turbulent airflow for enhanced heat transfer. Base tube outer diameters range from 15.88mm to 51mm, with fin heights up to 16mm and fin pitches of 3.5-10mm. These tubes are suitable for temperatures up to 180°C and are customizable in lengths up to 15 meters, with plain or beveled ends for easy installation.
Crimped Fin Tubes undergo rigorous testing, including hydrostatic, eddy current, and thermal performance tests, to ensure compliance with ASTM A450/A450M and TEMA standards. The crimped design provides moderate mechanical resistance and good corrosion protection, especially when using stainless steel or copper, making them ideal for environments with high humidity or corrosive fluids like seawater. Surface treatments such as galvanization, 3LPE coating, or tinning further enhance durability, while the fin design minimizes fouling and ash accumulation, ensuring low maintenance.
Compared to other finned tubes like L or G types, crimped fin tubes offer higher airside turbulence due to their corrugated fin structure, resulting in up to 5-8 times greater heat transfer efficiency than plain tubes. They are particularly suited for air cooled exchangers in applications like air heaters, condensers, and boiler economizers, where compact designs and energy efficiency are critical. Their cost-effectiveness compared to high-frequency welded (HFW) fin tubes makes them a preferred choice for moderate-temperature applications.
Addressing challenges like pipeline corrosion and thermal inefficiency, crimped fin tubes provide a robust solution for engineers seeking reliable thermal transfer tubes. Their versatility, ease of installation, and ability to handle high-pressure fluids make them essential for demanding environments, ensuring long-term performance and reduced operational costs in heat exchanger fins systems.
Crimped fin tube cross section
Crimped Fin Tubes offer higher airside turbulence and enhanced heat transfer compared to L Type Fin Tubes due to the crimping of the fins.
| Sr. No | Particulars | Range |
|---|---|---|
| 1 | Base Tube Material | Stainless Steel, Carbon Steel, Alloy Steel, Titanium, Copper, Duplex Stainless Steel, and Inconel etc. (all material in the theoretical limit) |
| 2 | Base Tube Outside Diameter | 15.88 mm to 219.00 mm OD (⅜” NB pipe to 8” NB pm) |
| 3 | Base Tube Thickness | 1.00 mm And Above |
| 4 | Base Tube Length | 500 mm Min To 15000 mm |
| 5 | Fin Material | Aluminum, Copper, Stainless Steel, Carbon Steel. |
| 6 | Fin Thickness | 0.15mm, 2.00mm |
| 7 | Fin Density | 118 FPM (3 FPI) to 433 FPM (11 FPI) |
| 8 | Fin Height | 6 mm to 25.40 mm |
| 9 | Bare Ends | As per Client Requirement |
| 10 | Manufacturing Capacity | 4,00,000 Meter Per Annum |
The Crimped Fin Tubes (Spiral Tension Wound Fin Tube) can be supplied with EN 10204 EN 3.1 and EN 3.2 certifications. We can provide Third Party Inspection from any reputed inspection agency.
We offer you a broad portfolio of materials and can expand our offerings at any time to meet your specific needs regarding thermal conductivity, mechanical properties, or corrosion resistance.
For Aluminum L-Foot finned tubes, the fin material is aluminum, either 1100-0. The tube material is generally carbon steel, stainless steel, or brass; however the tube can be of any material.
For Welded Helical Solid and Welded Helical Serrated finned tubes, the fin and tube materials can be any combination that can be welded together using HIGH FREQUENCY WELDING process.
The materials chosen for a given application are a function of service temperature, corrosive environment, and/or erosive environment. Common tube materials used for our welded product lines include: carbon steel, carbon moly, chrome moly, stainless steel, Inconel, and Incoloy. Common fin materials include: carbon steel; stainless steels of types 304, 310, 316, 321, 409, and 410; Nickel 200, and Inconel.
We offer you a broad portfolio of materials and can expand our offering at any time to meet your specific needs regarding thermal conductivity, mechanical properties, or corrosion resistance.
| Material | Grade |
|---|---|
| Carbon Steel Tubes | A179, A192, SA210 Gr A1/C, A106 Gr B, A333 Gr3/Gr6/Gr8, A334 Gr3/Gr6/Gr8, 09CrCuSb, DIN 17175 St35.8/St45.8, EN 10216 P195/P235/P265, GB/T3087 Gr10/Gr20, GB/T5310 20G/20MnG |
| Alloy Steel Tubes | A209 T1/T1a, A213 T2/T5/T9/T11/T12/T22/T91, A335 P2/P5/P9/P11/P12/P22/P91, EN 10216-2 13CrMo4-5/10CrMo9-10/15NiCuMoNb5-6-4 |
| Stainless Steel Tubes | TP304/304L, TP316/TP316L, TP310/310S, TP347/TP347H |
| Copper Tubes | UNS12200/UNS14200/UNS70600, CuNi70/30, CuNi 90/10 |
| Titanium Tubes | B338 Gr 2 |
Our factory is equipped with professional technical research and design personnel who can provide product optimization design and services.
Quality is the foundation of an enterprise. We adopt advanced production equipment and experienced technical personnel, constantly improve product technology, strictly control every processing step, and strive to compete with first-class quality products.
Testing instrument
Hardness tester
Drawing Machine
Component analyzer
Aluminium KL finned tube
L LL KL G production line
Production equipments
Extrusion equipment
Fin tube bending
Finned tubes are available in many types and configurations. Below is a detailed classification based on fabrication process, fin geometry, material, and applications.
Low fin tubes enhance heat transfer in compact hea...
Longitudinal finned tubes boost heat transfer effi...
Laser welded finned tubes enhance heat exchanger e...
Helical solid finned tubes enhance heat transfer e...
High fin tubes maximize heat transfer efficiency i...
L, ll, and kl finned tubes optimize heat transfer ...