ASTM A312 TP304 Stainless Steel Studded Tube for Furnances and Evaporators

Product Specification

ASTM A312 TP304 Studded Tube Application 

1. Chemical & Petrochemical Plants

• Used in heat exchangers, condensers, and reactors handling corrosive chemicals (acids, alkalis, hydrocarbons).
• Resists chloride-induced stress corrosion cracking (SCC) in harsh environments.

2. Oil & Gas Industry

• Ideal for heat recovery systems, boilers, and furnaces in refineries and offshore platforms.
• Withstands high temperatures and sour gas (H₂S) environments.

3. Power Generation

• Deployed in boilers, superheaters, and waste heat recovery units in thermal/nuclear power plants.
• Handles steam and high-pressure water efficiently.

4. Marine & Desalination

• Used in seawater desalination evaporators and shipboard heat exchangers due to excellent pitting resistance.

5. Food & Pharmaceutical Processing

• Suitable for hygienic heat exchangers due to its non-reactive, easy-to-clean surface.

6. Pulp & Paper Industry

• Resists corrosive byproducts (e.g., sulfides) in digesters and black liquor recovery boilers.

ASTM A312 TP304 Studded Fin Tube Key Features

• Material: A312 TP304 (18% Cr, 8% Ni) offers excellent oxidation resistance up to 870°C (1600°F).
• Studded Fins: Enhances heat transfer efficiency by increasing surface area; studs improve turbulence.
• Corrosion Resistance: Performs well in acidic, alkaline, and chloride-rich environments (better than carbon steel).
• Weldability & Fabrication: Easily welded and formed into custom configurations.

ASTM A312 TP316L Studded Fin Tube FAQ

1. What are the advantages of studded fins over plain or spiral fins?

• Higher heat transfer efficiency due to increased turbulence.
• Better mechanical strength (studs resist erosion & vibration).
• Easier cleaning compared to tightly wound spiral fins.
• Customizable stud pitch & height for optimized performance.

2. How does TP304 compare to TP316 for studded fin tubes?

• TP304: Lower cost, good general corrosion resistance.
• TP316: Contains 2-3% Molybdenum for better chloride & pitting resistance (e.g., seawater, acidic environments).
• Choice depends on environment—TP316 is preferred for harsher conditions.

3. Can TP304 studded tubes handle high-pressure applications?

• Yes, A312 TP304 tubes are rated for high-pressure use, but the operating limits depend on wall thickness, temperature, and stud welding integrity.

4. What are the limitations of TP304 studded fin tubes?

• Not ideal for prolonged high temps (>500°C/932°F) due to carbide precipitation (sensitization).
• Weaker chloride resistance than TP316—may suffer pitting in saltwater or acidic chloride environments.
• Higher cost than carbon steel, but longer lifespan in corrosive settings.

5. How are studded fin tubes manufactured?

• Studs are resistance-welded or arc-welded onto the base tube in a staggered/helical pattern.
• Materials: Base tube (A312 TP304) + studs (usually same or higher-grade SS).
• Testing: Hydrostatic, ultrasonic (UT), or eddy current (ET) testing for quality assurance.

6. How do I select the right studded fin tube for my application?

• Fluid type (corrosive, abrasive, high-temp).
• Pressure & temperature requirements.
• Stud pitch/density (affects heat transfer & pressure drop).
• Material upgrade options (TP316L, 321, or duplex SS for harsher conditions).

7. Where can I buy A312 TP304 studded fin tubes?

• Specialized manufacturers of heat exchanger tubing (e.g., FinTube, Salem Tube, Wieland Thermal Solutions).
• Custom orders are available for specific stud patterns, lengths, and testing requirements.

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