ASTM A213 T9 Alloy Steel Studded Fin Pipe with 13Cr Studs for
Radiant Coil Applications
Studded fin pipes are widely used in radiant coils for
high-temperature and high-pressure environments such as furnaces,
heaters, and boilers. ASTM A213 T9 alloy steel with 13% chromium (13Cr) studs ensures excellent mechanical strength, thermal efficiency, and
resistance to corrosion and oxidation, making it ideal for
demanding applications.
1. Material Specification Base Tube Material:- Standard: ASTM A213
- Grade: T9 Alloy Steel
- Type: Seamless ferritic alloy steel
- Applications: Used in high-temperature services, including heat exchangers and
boiler systems.
Stud Material:- Material: 13Cr (13% Chromium)
- Purpose: Improves heat transfer and resists oxidation and corrosion at
elevated temperatures.
2. Chemical Composition ASTM A213 T9 Base Tube:| BASE TUBE ASTM A213 T9 FIN PIPE Chemical Composition | | Element | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Silicon (Si) | Chromium (Cr) | Molybdenum (Mo) | ASTM A213 T9 | 0.08 – 0.18 | 0.30 – 0.60 | ≤ 0.025 | ≤ 0.025 | 0.50 – 1.00 | 8.00 – 10.00 | 0.90 – 1.10 |
13Cr Studs:| STUDS 13Cr Chemical Composition | | Element | Carbon (C) | Manganese (Mn) | Chromium (Cr) | Silicon (Si) | Phosphorus (P) | Sulfur (S) | | 13Cr Studs | ≤ 0.20 | ≤ 1.00 | 12.00 – 14.00 | ≤ 1.00 | ≤ 0.030 | ≤ 0.030 |
3. Mechanical Properties | BASE TUBE ASTM A213 T9 FIN PIPE Mechanical Properties | | Property | Tensile Strength | Yield Strength | Elongation | Hardness | | ASTM A213 T9 | ≥ 415 MPa | ≥ 205 MPa | ≥ 20% | ≤ 163 HB |
| STUDS 13Cr Mechanical Properties | | Property | Tensile Strength | Yield Strength | Elongation | Hardness | | 13Cr Studs | ≥ 485 MPa | ≥ 275 MPa | ≥ 15% | ≤ 217 HB |
4. Features of Studded Fin Pipe Enhanced Heat Transfer: - The 13Cr studs provide additional surface area, significantly
improving heat transfer efficiency.
- Suitable for radiant sections in furnaces where high thermal
conductivity is crucial.
High-Temperature Resistance: - ASTM A213 T9 alloy steel withstands elevated temperatures up to
650°C.
- 13Cr studs resist oxidation and scaling, even in aggressive
environments.
Corrosion Resistance: - Chromium content in the base tube and studs enhances resistance to
corrosion in harsh environments, including exposure to flue gases
and combustion byproducts.
Durability: - Strong mechanical bonding between the base tube and studs ensures
long-term performance under thermal cycling and vibration.
5. Applications Radiant Coils in Furnaces and Heaters: - Used in radiant sections to absorb heat from combustion gases and
transfer it to process fluids.
Boiler Systems: - Ideal for water tube boilers in power plants and refineries.
Petrochemical and Refining Industries: - Commonly used in process heaters, reformers, and cracking furnaces.
High-Temperature Heat Exchangers: - Suitable for heat recovery applications in industrial processes.
6. Advantages - Energy Efficiency: Improves thermal efficiency by maximizing heat transfer in
radiant sections.
- Longevity: Combines high-temperature resistance and corrosion resistance for
long-term durability.
- Cost-Effective: Reduces downtime and maintenance costs by providing a reliable
and robust heat exchange solution.
- Versatility: Suitable for various high-temperature industrial processes.
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