ASME TEMA Tube Bundle for Heat Exchanger
Our TEMA-standard heat exchanger tube bundle is precision-engineered from ASME SA789 S32750 (UNS S32750/F53) duplex stainless steel seamless tubes and a matching tubesheet. This bundle is specifically designed to withstand extreme operating conditions including severe corrosion, high pressure, and thermal cycling. Commonly used in offshore, chemical processing, refining, and FGD applications, it offers superior performance and a significantly longer service life compared to standard 316L or 304 materials, reducing total cost of ownership and downtime.
Heat Exchanger Tube Specifications
Chemical Composition - ASME SA789 S32750
| Element |
Cr |
Ni |
Mo |
N |
Mn |
Cu |
Si |
P |
S |
C |
Fe |
| Value |
24-26% |
6-8% |
3-4% |
0.24-0.32% |
1.2% |
0.5% |
0.8% |
0.035% |
0.02% |
0.03% |
Balance |
Mechanical Properties
| Property |
Tensile Strength |
Yield Strength min. |
Elongation in 2 inches, min. |
Hardness (Rockwell C) |
| Values |
≥ 795 MPa (115 ksi) |
≥ 550 MPa (80 ksi) |
≥ 15 % |
≤ 32 HRC |
Key Performance Advantages
Engineered Molecular Armor for Extreme Environments
This "Super Duplex" alloy features a meticulously balanced microstructure with high Chromium, Molybdenum, and Nitrogen content. It actively withstands aggressive agents like chlorides, sulfides, and CO₂ that rapidly degrade standard grades, making it ideal for seawater cooling, chemical processing, and offshore operations.
Dual-Phase Strength for Lasting Integrity
The unique ferritic-austenitic structure provides exceptional mechanical strength—approximately double the yield strength of common 316L austenitic tubes. This ensures superior resistance to stress corrosion cracking (SCC), high pressures, thermal cycling, and flow-induced vibration.
Economic & Operational Benefits
Reduced Lifetime Cost: Dramatically extended service intervals and reduced downtime lead to significantly lower Total Cost of Ownership (TCO).
Design Efficiency: High strength allows for thinner tube walls, reducing material weight and cost without compromising safety.
Asset Longevity: Protects your capital investment by delaying the need for costly full-scale replacements.
Guaranteed Performance Through Precision Manufacturing
Strictly controlled solution annealing and quenching processes ensure optimal 50/50 phase balance, guaranteeing promised corrosion resistance and mechanical properties in every meter of tube.
Synergistic Component for High-Performance Bundle
Perfect material matching between tubes and tubesheet eliminates galvanic corrosion issues at critical tube-to-tubesheet junctions, ensuring peak thermal efficiency and structural integrity.
S32750/F53 Duplex Steel Tubesheet
Ultimate Guardian Against Catastrophic Failure
Engineered with PREN > 40 to resist pitting, crevice corrosion, and stress corrosion cracking at the most critical point—the tube joint. Essential in chloride-laden environments where inferior materials can lead to leaks and costly downtime.
Engineered for Structural Dominance and Fatigue Resistance
With yield strength nearly double that of standard austenitic steels, the S32750 tubesheet provides exceptional rigidity and stability, minimizing deflection under pressure and thermal cycling while dampening operational vibrations.
Corrosion-Resistant Joints with Matching Tubes
Using identical S32750 material for both tubes and tubesheet eliminates galvanic potential, creating homogeneous, leak-proof seals with the same corrosion resistance as the parent material.
Optimizes Fabrication Quality and Enables Advanced Designs
Consistent metallurgy allows for precision drilling and grooving to tight TEMA tolerances, ensuring perfect tube fit-up and reliable welds.
Unmatched Lifecycle Value and Risk Mitigation
Extends operational life by many years
Drastically reduces lifecycle costs by avoiding bundle replacement
Minimizes operational risk for continuous process industries
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