| Material: | ASTM A213 T9， ASTM A179 | Fin Type: | Stud， L，HFW， G， LL， |
|---|---|---|---|
| NDT: | HT， ECT， Bongding Test | Application: | Ecominizer， Air Cooler |
ASTM A213 T9 Alloy Steel Seamless Stud Fin Tube Customized Size
What is studded finned tube?
Fin tubes， also known as finned tubes， are heat transfer tubes that have extended surfaces (fins) attached to them. These fins increase the surface area of the tubes， which enhances heat transfer efficiency. Fin tubes are commonly used in various applications where heat exchange is required， such as heat exchangers， boilers， air conditioning systems， and refrigeration units.
The fins on these tubes can be of various types， such as plain， serrated， or helical. They are typically made of materials with good thermal conductivity， such as copper， aluminum， or stainless steel. The fins can be either external (externally finned tubes) or internal (internally finned tubes)， depending on the application requirements.
Features of a Studded Finned Tube:
-It occupies less space and is， therefore， compact
-Highly durable
-Preferred over Finned tubes as they act as heat transfer systems
-Enhanced performance
Size Reference for Different Types of Finned Tubes
| Type | Description | Base tube | Fin specification (mm) | ||
| O.D. (mm) | Fin pitch | Fin height | Fin thick | ||
| Embedded | G-type fin tueb | 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 | / | |
| 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 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 | |
| Studed fin tube | 25-219 | 8-30 | 5-35 | φ5-20 | |
Chemical Composition Of T9
| Cr， % | C， % | P， % | S， % | Mo， % | Mn， % | Si， % |
| 4.00-6.00 | 0.15 max | 0.025 max | 0.025 max | 0.45-0.65 | 0.30-0.60 | 0.50 max |
Mechanical Properties of A213 T9 Alloy Steel Seamless Tubes
| Properties | Data |
| Tensile strength， min， (MPa) | 415 Mpa |
| Yield strength， min， (MPa) | 205 Mpa |
| Elongation， min， (%)， L/T | 30/20 |
Equivalent Material of Alloy Steel T9
| ASTM | JIS G 3458 | UNS | BS | ISO |
|---|---|---|---|---|
| T9 | STPA 26 | S50400 | 3604 P1 629-470 | 2604 II TS38 |
Stud fin tubes offer several advantages in heat transfer applications:
1️⃣ Enhanced Heat Transfer: Stud fins increase the surface area of the tube， improving heat transfer efficiency between the fluid inside the tube and the surrounding medium. This leads to more effective heat exchange and improved overall performance of the system.
2️⃣ Mechanical Stability: The studs on the fin tubes provide mechanical stability and rigidity to the fins， preventing them from bending or getting damaged during handling or operation. This makes stud fin tubes more durable and resistant to mechanical stresses.
3️⃣ Resistance to Fouling: The presence of studs on the fin tubes disrupts the formation of fouling deposits， such as scaling or debris accumulation， on the fin surfaces. This helps maintain consistent heat transfer performance over extended periods and reduces the need for frequent cleaning or maintenance.
4️⃣ Uniform Heat Distribution: Stud fins promote uniform heat distribution along the tube's length. The studs act as spacers between the fins， ensuring that heat is evenly transferred across the entire surface. This results in reduced temperature variations and improved thermal efficiency.
5️⃣ Enhanced Airflow: The studs on the fin tubes create turbulence in the airflow， increasing convective heat transfer. This improves the effectiveness of heat dissipation in applications such as air-cooled heat exchangers or condensers.
Applications:
-Power Plants
-Chemical Industry
-Heat Recovery Plants
-Heat Industry
-Steam Boiler
-Oil Refining
