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ASTM B163 N08825 Extruded Finned Tube for Seawater Cooling Heat Exchangers

ASTM B163 N08825 Extruded Finned Tube for Seawater Cooling Heat Exchangers

Merknaam: YUHONG
Modelnummer: N.v.t
MOQ: 500 kg
Prijs: To be discussed
Verpakking: IJZEREN FRAME HOUTEN KOFFER
Betalingsvoorwaarden: T/T,L/C
Detailinformatie
Plaats van herkomst:
China
Certificering:
ISO9001:2015; ISO14001:2015; ISO45001:2018; PED 2014/68/EU; WPS/PQR/WPQ; ISO 3834
Product:
GEËXTRUDEERDE VINBUIS
Materiaal:
ASTM B163 N08825
Sollicitatie:
Zeewaterkoeling-warmtewisselaars, offshore-platformkoelsystemen, waterkoelers voor scheepsmotoren, L
Pakket:
IJZEREN FRAME HOUTEN KOFFER
Levering vermogen:
5000 Meters/Dag
Productomschrijving
ASTM B163 N08825 Extruded Finned Tube for Seawater Cooling Heat Exchangers

Extruded finned tubes manufactured with ASTM B163 / ASME SB163 UNS N08825 (Incoloy 825) base material are engineered for highly corrosive seawater and marine cooling environments. The metallurgical bonding between the aluminum fin and the nickel-iron-chromium alloy tube ensures excellent heat transfer efficiency while maintaining long-term resistance to chloride-induced corrosion, pitting, and stress corrosion cracking.

This product is widely used in seawater-based cooling systems where conventional stainless steels are insufficient due to aggressive chloride exposure and fluctuating salinity conditions.


1. Typical Applications

ASTM B163 N08825 extruded finned tubes are widely used in:

  • Seawater cooling heat exchangers
  • Offshore platform cooling systems
  • Marine engine jacket water coolers
  • LNG support cooling systems
  • Coastal power plant seawater condensers
  • Auxiliary seawater cooling loops
  • Turbine heat rejection systems
  • Offshore oil & gas processing units
  • Produced water cooling systems
  • Gas compression aftercoolers
  • Chloride-rich process cooling systems
  • Chemical industry corrosive fluid heat exchangers

2. Product Structure & Features
  • Base Tube Material: ASTM B163 / ASME SB163 UNS N08825 (Incoloy 825)
  • Fin Material: High-purity aluminum (commonly AL1060)
  • Fin Type: Extruded solid fin (integrated metal bonding)
  • Manufacturing Process: Cold extrusion forming with metallurgical bonding
Key Advantages
  • Excellent resistance to seawater corrosion and chloride attack
  • High thermal conductivity due to aluminum fins
  • Strong mechanical bonding between fin and tube
  • Suitable for vibration and offshore operating conditions
  • Long service life in marine environments

3. Size Range (Typical Manufacturing Capability)
Parameter Range
Base Tube Outer Diameter 12 mm – 50 mm
Base Tube Wall Thickness 1.0 mm – 5.0 mm
Tube Length 1 m – 25 m (customized)
Fin Height 6 mm – 17 mm
Fin Thickness 0.3 mm – 0.6 mm
Fin Pitch 2.0 mm – 5.0 mm
Fin Density 300 – 1000 fins/m

4. Chemical Composition (UNS N08825 / Incoloy 825)
Element Content (%)
Ni (Nickel) 38.0 – 46.0
Fe (Iron) ≥ 22.0
Cr (Chromium) 19.5 – 23.5
Mo (Molybdenum) 2.5 – 3.5
Cu (Copper) 1.5 – 3.0
Ti (Titanium) 0.6 – 1.2
C (Carbon) ≤ 0.05
Mn (Manganese) ≤ 1.0
Si (Silicon) ≤ 0.5
Others Balanced

5. Mechanical Properties
Property Value
Tensile Strength ≥ 586 MPa
Yield Strength (0.2%) ≥ 241 MPa
Elongation ≥ 30%
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Alle recensies

K
K*w
Malaysia Feb 21.2026
It's hot and humid here, and our old wrap-on tubes used to rust like crazy. Switched to your extruded ones—the aluminum fin covers the steel pipe perfectly, so corrosion shouldn't be an issue.
K
Kumar
India Nov 8.2025
No corrosion issues so far, though we're running below dew point carefully. Installation was straightforward—tube sheets lined up, ends clean, rolling into the header went smooth.
I
I*n
Pakistan Aug 9.2024
Quality is top-tier, and the price is very competitive compared to others. Most importantly, the SA249 TP304 wall thickness is uniform and the welding looks beautiful.