TEMA Tube Bundle for Heat Exchanger Fabricated with S32750, F53 Duplex Seamless Tubes And Tubesheet

TEMA Tube Bundle for Heat Exchanger Fabricated with S32750, F53 Duplex Seamless Tubes And Tubesheet

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:

ASME SA789 S32750

Chemical Composition

Mechanical Property

1. Engineered Molecular Armor for Extreme Environments

This isn't just stainless steel; it's a "Super Duplex" alloy with a meticulously balanced microstructure. The synergistic blend of high Chromium, Molybdenum, and Nitrogen creates an inherent defense mechanism at the molecular level. It doesn't merely resist corrosion; it actively withstands the most aggressive agents like chlorides, sulfides, and CO₂, which would rapidly degrade standard grades. This makes it the definitive solution for seawater cooling, chemical processing, and offshore operations where failure is not an option.

2. Built with 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 translates into superior resistance to stress corrosion cracking (SCC), a primary failure mode in shell and tube exchangers. Your bundle gains inherent robustness against high pressures, thermal cycling, and flow-induced vibration, ensuring dimensional stability and a longer, trouble-free service life.

3. Delivers Direct Economic & Operational Benefits

Choosing S32750 is an investment in operational excellence:

Reduced Lifetime Cost: While the initial investment may be higher, the dramatically extended service intervals and reduced risk of unplanned downtime lead to a significantly lower Total Cost of Ownership (TCO).

Design Efficiency: Its high strength allows for the use of thinner tube walls (where permitted by code), potentially reducing material weight and cost for the entire bundle without compromising safety or performance.

Asset Longevity: It effectively protects your capital investment in the entire heat exchanger unit, delaying the need for costly full-scale replacements.

4. Guaranteed Performance Through Precision Manufacturing
Our tubes are not just sourced to standard; they are guaranteed to perform. Through strictly controlled solution annealing and quenching processes, we ensure the optimal 50/50 phase balance is achieved and locked in. This guarantees the promised corrosion resistance and mechanical properties are fully present in every meter of tube, backed by complete traceability and certified mill test reports.

5. A Synergistic Component for a High-Performance Bundle
The advantage multiplies when the tube material is perfectly matched with a S32750 tubesheet. This compatibility eliminates galvanic corrosion issues at the critical tube-to-tubesheet junction. Combined with our expert welding procedures, it creates a unified, homogeneous bundle where the weakest link is eliminated, ensuring peak thermal efficiency and structural integrity.

S32750/F53 Duplex Steel Tubesheet

1. The Ultimate Guardian Against Catastrophic Failure

A tubesheet failure often means total exchanger shutdown. Our S32750 tubesheet acts as a robust, monolithic barrier, engineered with a PREN > 40 to resist the combined assault of pitting, crevice corrosion, and stress corrosion cracking (SCC) at the most critical point—the tube joint. This is crucial in chloride-laden environments (seawater, chemical processes) where inferior materials can develop leaks, leading to costly cross-contamination and unscheduled downtime.

2. Engineered for Structural Dominance and Fatigue Resistance

With a yield strength nearly double that of standard austenitic steels, the S32750 tubesheet provides an exceptionally rigid and stable foundation for the entire tube bundle. This high structural integrity minimizes deflection under pressure and thermal cycling, ensuring tube alignment is maintained. Its superior fatigue strength dampens operational vibrations, protecting the integrity of thousands of tube-to-tubesheet welds over decades of service.

3. Enables Perfect, Corrosion-Resistant Joints with Matching Tubes

The greatest corrosion risk in a bundle often lies at the tube-to-tubesheet junction due to galvanic potential. Using an identical S32750 material for both tubes and tubesheet eliminates this galvanic couple. This compatibility, combined with our specialized welding procedures, creates a homogeneous, metallurgically continuous joint. The result is a leak-proof seal that maintains the same corrosion resistance as the parent material, effectively making the joint "disappear" as a weak point.

4. Optimizes Fabrication Quality and Enables Advanced Designs

The consistent metallurgy and known machining characteristics of S32750 allow for precision drilling and grooving to tight TEMA tolerances. This ensures perfect tube fit-up, which is essential for achieving strong, consistent welds and reliable roller expansion. Its high strength also enables the design of thinner, lighter tubesheets (where ASME code allows) for high-pressure applications or compact exchanger designs, without sacrificing safety margin.

5. Delivers Unmatched Lifecycle Value and Risk Mitigation

An S32750 tubesheet is the cornerstone of a high-reliability, low-maintenance exchanger. It transforms the unit from a maintenance item into a long-term asset. By virtually eliminating the risk of tubesheet-driven failure, it:

Extends the exchanger's operational life by many years.

Drastically reduces lifecycle costs by avoiding the extraordinary expense of bundle replacement or field repair.

Minimizes operational risk, providing peace of mind for plant managers and engineers in continuous process industries.

In essence, this tubesheet does not just hold tubes in place; it guarantees the integrity of the entire heat transfer system. It is the definitive choice for engineers who specify based on total cost of ownership and operational security, not just initial price.