Studded Tubes ASTM A213 T9 For Furnaces In Corrosive Environment
Product Specifications
Attribute | Value |
Product | Fin Tubes or Finned Tube |
Type | Studded Fin Tubes |
Standard | ASTM A213 |
Material | T9 Base Tubes and CS Fins |
O.D. | Generally Greater Than 100mm |
Length | According to clients' need |
Use | For large equipment, Heat Exchanger / Boiler / Furnaces / Condensers / Evaporators, etc |
Packing | Ply-wooden Case With Iron Frame |
Product Overview
Studded fin tubes, also known as nail head tubes or nail-like ribbed tubes, are widely used in petrochemical industries, particularly in the convection chambers of tubular furnaces to enhance heat transfer effects.
Design Features
- Studded Fins: Protruding fins increase surface area for heat transfer and promote turbulent flow
- Material: Constructed from durable materials including carbon steel, stainless steel, alloy or copper
- Robust Structure: Studs arranged in specific formations for effective heat transfer in high-pressure applications
ASTM A213 T9 Alloy Specifications
ASTM A213 covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes, including Grade T9.
Chemical Composition (%)
Grade | C | Mn | P | S | Si | Cr | Mo |
T9 | 0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.025-1.00 | 8.00-10.00 | 0.90-1.10 |
Mechanical Properties
Grade | Tensile Strength,min | Yield Strength (0.2%Offset,min) |
T9 | 60ksi (415 MPa) | 30ksi (205 MPa) |
Key Advantages
- Minimal heat affected zone with excellent weld microstructure
- Significantly improved heat exchange efficiency compared to smooth tubes
- Superior corrosion and wear resistance with low contact thermal resistance
- Enhanced fluid mixing for improved thermal performance
- Versatile applications across multiple industries
- Robust construction for harsh operating conditions
Industrial Applications
- Heat exchangers, boilers, furnaces and refineries
- Power generation, petrochemical processes, and HVAC systems
- Cooling towers, condensers, and evaporators
- Fired heaters and thermal process equipment
- Ship cooling systems and marine heat exchangers
Finned Tube Specifications
Type | Description | Base tube 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 |
Wound | L / KL / LL type fin tube | 16-63 | 2.1~5 | <17 | ~0.4 |
Welding | HF-welding fin tube | 16-219 | 3~25 | 5~30 | 0.8-3 |
Studded | Studded fin tube | 25-219 | 8~30 | 5~35 | φ5-20 |
