Yuhong Group Co., Ltd. supplies complete thermal systems - shell & tube heat exchangers (TEMA heat exchanger designs), pressure vessels, air coolers - and every critical component: Fin Tube, Furnace Tube, Heat Exchanger Tube, Stainless Steel Seamless Tube, Nickel Alloy Tube, Copper alloy tube, heat exchanger tubesheet, and heat exchanger tube bundle. For seawater and brackish water services, we offer high-performance copper alloy tube bundles manufactured from Admiralty Brass C44300 - a proven material resistant to corrosion, biofouling, and impingement attack.

The Admiralty Brass C44300 tube bundle is a heat exchanger tube bundle specifically engineered for shell & tube condensers and coolers operating with seawater, brackish water, or high-chloride cooling water. Each bundle features ASME SB111 C44300 seamless tubes (Admiralty brass with a nominal composition of 70-72% Cu, 28-30% Zn, plus trace tin and arsenic for dezincification resistance). The tubes are rolled into a compatible copper alloy tubesheet (typically naval brass C46400) and assembled with baffles, tie rods, and impingement protection - delivering long service life in aggressive marine environments.

• Excellent corrosion resistance to clean seawater and brackish water - outperforms carbon steel and many stainless steels.
• Dezincification inhibited - arsenic addition prevents selective zinc leaching, a common failure mode in ordinary brass.
• Good thermal conductivity (approx. 100 W/m*K) - efficient heat transfer.
• Biofouling resistance - copper ions discourage marine growth on tube surfaces.
• Cost-effective - significantly less expensive than titanium or nickel alloys, while offering adequate life for many marine applications (10-15 years).

• Tube-to-tubesheet joint: Precision expanded (rolled) connection - no welding required to avoid heat-affected zone corrosion. Grooved tubesheet holes enhance holding strength.
• Impingement protection standard: For inlet water velocity >2 m/s, we install a C70600 impingement plate opposite the nozzle. This simple feature can double tube bundle life.
• Optimized tube layout: Triangular pitch maximizes heat transfer; square pitch available for easier mechanical cleaning.
• Full ASME compliance: Material certifications, hydrostatic testing, and dimensional reports included.

• Direct fit - manufactured to your original bundle drawing or field measurements.
• Restored performance - replaces corroded, fouled, or leaky tubes.
• Lower cost than buying a complete new heat exchanger.
• Fast turnaround - typical 5-6 weeks for custom bundle.
• Component support - we can also supply only fin tubes, heat exchanger tubesheet, or individual copper alloy tubes for your own assembly.

• Shipboard coolers - engine jacket water coolers, lube oil coolers (seawater side).
• Coastal power plants - auxiliary cooling water condensers.
• Desalination plants - brine heaters, evaporator condensers.
• Offshore platforms - process coolers (where Cu-Ni is often preferred, but C44300 used for less critical duty).
• Industrial chillers - once-through seawater cooling.

Need only parts instead of a full bundle? We supply:

• C44300 seamless tubes - cut to length, with or without end finishing.
• Fin tubes - C44300 base tube with aluminum or copper fins for air coolers.
• Heat exchanger tubesheet - drilled and grooved in C46400 or C70600.
• Baffles, tie rods, impingement plates - any copper alloy or coated carbon steel.