Serrated Spiral HF Welding Fin Tubes ASTM A335 P9 For Heat Exchangers
Definition
Serrated spiral HF (high-frequency) welding fin tubes are advanced heat exchangers designed to enhance thermal performance through a unique fin design.The combination of serrated fins and spiral configurations maximizes heat transfer while maintaining structural integrity.The fins are attached to the tube using high-frequency welding techniques, ensuring strong and durable connections while minimizing thermal distortion.
Design Features
Serrated Fins:The fins are serrated, creating a larger surface area and promoting turbulent flow, which improves heat exchange efficiency.
Material:Typically constructed from materials such as carbon steel, stainless steel, alloy or copper, providing durability and resistance to corrosion.
Spiral Configuration:The spiral design allows for a continuous flow of fluid around the tube, enhancing the heat transfer process.
This page let's talk about ASTM A335 P9 alloy serrated spiral HF welding fin tubes.
Detailes of ASTM A335 Base Tubes ( Wall thickness generally is Min. )
This specification covers nominal wall and minimum wall seamless ferritic alloy-steel pipe intended for high-temperature service. Pipe ordered to this specification shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Selection will depend upon design, service conditions, mechanical properties, and high-temperature characteristics.
Chemical Composition (%)
| Grade | C | Mn | P | S | Si | Cr | Mo | Ni | V |
| P9 | 0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.25-1.00 | 8.00-10.00 | 0.90-1.10 | ... | ... |
Mechanical Properties
| Grade | Tensile Strength,min | Yield Strength (0.2%Offset,min) |
| P9 | 60ksi (415 MPa) | 30ksi (205 MPa) |
Advantages
1.The installation is simple and economical.It is easy to maintain. After the installation of high frequency welding spiral fin tube, it is no longer necessary to maintain;
2.The serrated design and spiral configuration enhance thermal performance compared to traditional fin tubes,heat dissipation area is more than 8 times of smooth tube, internal more smooth, internal flow resistance is small;
3.Corrosion resistance, wear resistance, low contact thermal resistance, high stability and long service life;
4.The unique fin shape promotes better fluid mixing, leading to more efficient heat exchange;
5.With a versatile application, suitable for a wide range of industries, including oil and gas, chemical processing, and power generation;
6.The robust constructionensures strong joints, providing durability and reliability in demanding environments
Application
Heat exchangers, boilers, furnaces and refineries
Ideal for use in various types of heat exchangers, including oil coolers, condensers, and evaporators.
Power Generation
Commonly used in power plants for efficient heat recovery and steam generation.
HVAC Systems
Utilized in heating, ventilation, and air conditioning systems to improve energy efficiency.
Chemical Processing
Employed in reactors and heat exchangers where optimal thermal performance is critical.
Specifications For Various Types Of Finned Tubes We Can Do
| Type | Description | Base tube | Fin specification (mm) |
| O.D. (mm) | Fin pitch | Fin height | Fin thick |
| Embedded | G-type fin tube | 16-63 | 2.1-5 | <17 | ~0.4 |
| Extruded | Single metal / Combined metal | 8-51 | 1.6-10 | <17 | 0.2-0.4 |
| Low fin tube / T-type fin tube | 10-38 | 0.6-2 | <1.6 | ~0.3 |
| Bamboo tube / corrugated tube | 16-51 | 8-30 | <2.5 | ~0.3 |
| Wound | L / KL / LL type fin tube | 16-63 | 2.1-5 | <17 | ~0.4 |
| String | String fin tube | 25-38 | 2.1-3.5 | <20 | 0.2-0.5 |
| U-type | U-type fin tube | 16-38 | / | / | / |
| Welding | HF-welding fin tube | 16-219 | 3-25 | 5-30 | 0.8-3 |
| H/HH type fin tube | 25-63 | 8-30 | <200 | 1.5-3.5 |
| Serrated spiral fin tube | 25-219 | 2-7 | <38.1 | 0.9-2.0 |
| Studed fin tube | 25-219 | 8-30 | 5-35 | φ5-20
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Serrated Spiral HF Welding Fin Tubes ASTM A335 P9 For Heat Exchangers Images
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