Product Description Content
Custom Stacked Shell and Tube Heat Exchanger Units & High-Performance Tube Bundles
Yuhong Group Co., Ltd. is an ASME-certified global manufacturer specializing in heavy thermal equipment, pressure vessels, and air coolers. Engineered for spatial efficiency and severe thermal duty, our stacked shell and tube heat exchanger units provide optimal heat recovery solutions for oil refineries, petrochemical plants, and offshore gas processing platforms.
In addition to custom-built equipment, Yuhong Group supplies a complete range of internal components and replacement spares. We manufacture high-precision heat exchanger tubesheet plates, straight or u tube bundle assemblies, and finned tube bundle systems for high-duty heat transfer units worldwide.
Engineering Concept: Why Choose Stacked Shell & Tube Heat Exchangers?
A stacked shell & tube heat exchanger consists of two or more shell units vertically mounted on top of each other and interconnected via external process nozzles. This configuration solves two critical processing bottlenecks:
Footprint Optimization: Vertically stacking shells reduces floor space requirements by up to 60% compared to side-by-side horizontal layouts, making it ideal for plot-constrained plants and offshore FPSO decks.
Overcoming Temperature Cross: When process fluid temperatures overlap (temperature cross condition), achieving high heat recovery in a single shell is thermodynamically impossible. Stacking shells in series simulates true counter-current flow, maximizing thermal efficiency across high-duty temperature ranges.
Available Configuration Types & Material Specifications
Yuhong Group builds stacked exchangers utilizing diverse TEMA mechanical configurations tailored to your operating fluids:
Configurations: Fixed Tubesheet (TEMA E/F/L/M), Floating Head (TEMA S/T with removable tube bundle), and U Tube Bundle units (TEMA U).
Stainless & Duplex Steels: ASTM A240/A213 304/304L, 316/316L, 321, 347H, Duplex 2205, Super Duplex 2507. Essential for corrosion resistance against sour gas and high-chloride fluids.
High-Temp & Nickel Alloys: Alloy 400 (Monel), Alloy 600/625 (Inconel), Alloy 800H (Incoloy), Hastelloy C276. Designed for extreme pressure and acidic refining services.
Non-Ferrous Alloys: CuNi 90/10, CuNi 70/30, Titanium Grade 2. Applied in seawater cooling systems requiring high erosion resistance.
Component Breakdown: Key Equipment Parts & Spare Supplies
| Component Part | Material & Fabrication Options | Functional Role in Stacked Equipment |
|---|---|---|
| Heat Exchanger Tubesheet | Heavy Forged Carbon Steel, Stainless Steel, Clad Steel Plates | Anchors internal heat transfer tubes. Precision CNC drilled with serrated grooves to ensure pressure-tight expanded or seal-welded joints. |
| Tube Bundle | Straight Tube, U Tube Bundle, or Finned Tube Bundle | The main core responsible for fluid isolation and thermal conduction. Manufactured to tight dimensional tolerances for smooth shell insertion. |
| Interstage Nozzles & Flanges | Heavy Forged Alloy Flanges (ANSI / ASME B16.5) | Vertically connects upper and lower shells, ensuring leak-free transition of fluid streams between stacked stages. |
| Baffles & Support Rods | Carbon Steel, Stainless Steel, Brass | Directs shell-side flow perpendicular to the tubes to maximize turbulence while protecting tubes against flow-induced vibration. |
| Support Saddles & Stacking Brackets | Structural Carbon Steel, High-Tensile Alloy Plates | Structural brackets designed to support the static weight, wind loads, and thermal expansion forces of the upper shell. |
Technical Highlights & Manufacturing Capabilities
Direct Tube Mill Integration: As a primary producer of seamless steel tubing, Yuhong Group controls raw material traceability and reduces lead times on custom tube bundle and exchanger fabrications.
Precision Tube-to-Tubesheet Welding: Automated orbital TIG welding combined with controlled hydraulic expansion ensures zero-leakage joint integrity under cyclic pressure conditions.
Ease of Maintenance: Designed with removable u tube bundle or floating head structures, allowing maintenance crews to pull tube bundles for mechanical cleaning without dismantling the entire structural framing.
Stringent QA/QC Standards: 100% Eddy Current Testing (ET), Radiographic Testing (RT), Hydrostatic Pressure Testing, Liquid Penetrant Inspection (PT), and PMI material verification.
Engineering Guidelines: Essential Knowledge for Stacked Exchanger Design
To ensure reliable performance in stacked shell and tube heat exchanger systems, engineers should evaluate the following factors during procurement:
Handling Thermal Expansion Mismatch: Stacked shells experience different operating temperatures, leading to differential expansion between top and bottom units. Intermediate piping must incorporate flexible loops or expansion joints to prevent flange strain.
Bundle Removal Clearance: Ensure adequate maintenance clearance is reserved in front of the unit equal to the total length of the tube bundle or u tube bundle for bundle pulling.
Vibration Fatigue Prevention: High fluid velocities traveling through vertical interconnecting nozzles can induce acoustic resonance. Specifying impingement plates inside the shell nozzle inlet prevents localized erosion on the top tube rows.
Target Industries & Applications
Oil & Gas Refining: Crude distillation unit (CDU) pre-heat trains, hydrocracker feed/effluent exchangers, amine reboilers.
Petrochemical Processing: Ethylene glycol plant coolers, naphtha splitters, aromatic recovery systems.
Offshore & FPSO Modules: High-pressure gas cooling and dew point control units where plot area is severely restricted.
Power Generation: High-pressure feed water heater stacks and boiler blowdown heat recovery systems.
Contact Yuhong Group Engineering Team
Need a custom quote for a stacked shell & tube heat exchanger, a replacement u tube bundle, or bulk supply of heat exchanger tubesheet plates and finned tube bundle units?
Company: Yuhong Group Co., Ltd.
Website: www.tema-heatexchanger.com
Direct Email: jimmy@steelseamlesspipe.com
Design Standards: ASME VIII Div 1, TEMA, API 660, PED 2014/68/EU, ISO 9001
