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Application of ASTM A335 P11 Serrated Fin Tubes in Petrochemical Convection Sections

ASTM A335 P11 Serrated Fin Tubes (High-Frequency Welded) are engineered for extreme thermal environments. Featuring a 4-inch large-diameter base pipe, a 5020mm length, and a specialized 5 FPI (Fins Per Inch) density, these tubes are the preferred choice for convection sections and main tube bundles in large-scale heat exchange equipment.

Key Applications in Petrochemical Industries

Refinery & Petrochemical Fired Heaters: In the convection section, these 4" pipes handle high-flow crude oil and intermediate media. The 5020mm span is ideal for long furnace chambers, while the 5 FPI density maximizes the heating surface area while maintaining optimal fluid resistance.
Hydroprocessing Units: Leveraging the corrosion resistance of P11 alloy steel against high-temperature hydrogen and sulfides, these serrated finned pipes significantly enhance heating efficiency.

Technical Analysis: Material & Structural Benefits

1. Material Advantage: ASTM A335 P11 (Grade 11)

High-Temperature Strength: P11 is a low-alloy heat-resistant steel ( $$1.25% Cr - 0.5% Mo$$ ) offering superior creep resistance at operating temperatures between $$550^circ C$$ and $$590^circ C$$ .
Oxidation & Corrosion Resistance: The Chromium and Molybdenum content prevents tube oxidation and maintains mechanical integrity in acidic, high-heat environments.
Thermal Compatibility: By using GR.11 fin material, the fin and base tube share the same expansion coefficient, reducing thermal stress during cycles and ensuring weld stability.

2. Structural Advantage: HFW Serrated Fins

Superior Metallurgical Bond: High-Frequency Resistance Welding (HFW) ensures a robust bond between the fin and the pipe, minimizing thermal resistance.
Enhanced Heat Transfer Coefficient: The serrated structure disrupts the fluid boundary layer, increasing turbulence. This results in a heat transfer coefficient 10% - 15% higher than standard solid fins.
Optimized 5 FPI Density: Designed for high heat loads, this density balances maximum surface area with controlled pressure drop across gas flows.

Application of ASTM A335 P11 Serrated Fin Tubes in Petrochemical Convection Sections

Application Details

Home > Application >

Application of ASTM A335 P11 Serrated Fin Tubes in Petrochemical Convection Sections

Sales Dept.

sales@steelseamlesspipe.com

+86-574-88013900

Contact Now

Application of ASTM A335 P11 Serrated Fin Tubes in Petrochemical Convection Sections

Key Applications in Petrochemical Industries

Refinery & Petrochemical Fired Heaters: In the convection section, these 4" pipes handle high-flow crude oil and intermediate media. The 5020mm span is ideal for long furnace chambers, while the 5 FPI density maximizes the heating surface area while maintaining optimal fluid resistance.
Hydroprocessing Units: Leveraging the corrosion resistance of P11 alloy steel against high-temperature hydrogen and sulfides, these serrated finned pipes significantly enhance heating efficiency.

Technical Analysis: Material & Structural Benefits

1. Material Advantage: ASTM A335 P11 (Grade 11)

High-Temperature Strength: P11 is a low-alloy heat-resistant steel ( $$1.25% Cr - 0.5% Mo$$ ) offering superior creep resistance at operating temperatures between $$550^circ C$$ and $$590^circ C$$ .
Oxidation & Corrosion Resistance: The Chromium and Molybdenum content prevents tube oxidation and maintains mechanical integrity in acidic, high-heat environments.
Thermal Compatibility: By using GR.11 fin material, the fin and base tube share the same expansion coefficient, reducing thermal stress during cycles and ensuring weld stability.

2. Structural Advantage: HFW Serrated Fins

Superior Metallurgical Bond: High-Frequency Resistance Welding (HFW) ensures a robust bond between the fin and the pipe, minimizing thermal resistance.
Enhanced Heat Transfer Coefficient: The serrated structure disrupts the fluid boundary layer, increasing turbulence. This results in a heat transfer coefficient 10% - 15% higher than standard solid fins.
Optimized 5 FPI Density: Designed for high heat loads, this density balances maximum surface area with controlled pressure drop across gas flows.

Application of ASTM A335 P11 Serrated Fin Tubes in Petrochemical Convection Sections

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube

Copper Alloy Steel Heat Exchanger Tube

Titanium Alloy Steel Heat Exchanger Tube

Alloy Steel Heat Exchanger Tube

U Bend Heat Exchanger Tube

Carbon Steel Heat Exchanger Tubes

Boiler Tube

Nickel Alloy Steel Boiler Tube

Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

Alloy Steel Boiler Tube

Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube

Copper Alloy Steel Heat Exchanger Tube

Titanium Alloy Steel Heat Exchanger Tube

Alloy Steel Heat Exchanger Tube

U Bend Heat Exchanger Tube

Carbon Steel Heat Exchanger Tubes

Boiler Tube

Nickel Alloy Steel Boiler Tube

Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

Alloy Steel Boiler Tube

Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

company application about Application of ASTM A335 P11 Serrated Fin Tubes in Petrochemical Convection Sections

Application of ASTM A335 P11 Serrated Fin Tubes in Petrochemical Convection Sections

Application Details

Application of ASTM A335 P11 Serrated Fin Tubes in Petrochemical Convection Sections