Yuhong Group Co., Ltd. provides custom engineered thermal cores and replacement components designed for severe industrial environments. We manufacture high-performance tube bundle assemblies, straight/bent heat transfer tubing, extended surface finned tube bundle units, and heavy forged heat exchanger tubesheet plates. Built to meet or exceed TEMA, ASME Section VIII Div 1, and API 660 standards, our products serve critical thermal management roles in shell and tube heat exchanger and air cooling installations globally.
As a primary seamless steel tubing manufacturer, Yuhong Group delivers fully integrated bundle fabrication, combining direct raw material control with precision CNC drilling, orbital tube-to-tubesheet welding, and non-destructive testing.
We fabricate thermal cores matching original OEM geometry or custom process specifications across major mechanical types:
Removable U Tube Bundle (TEMA U): Features single-tubesheet designs that accommodate extreme thermal expansion between tube and shell passes, eliminating thermal fatigue risks in high-temperature reboilers and steam generators.
Floating Head Bundle (TEMA S/T): Built with a stationary heat exchanger tubesheet on one side and a floating tubesheet on the other, allowing complete bundle removal for internal shell mechanical cleaning.
Fixed Tube Bundle (TEMA E/F): Rigid dual-tubesheet structures suitable for low thermal-differential duties or systems featuring expansion joints.
Extended Surface Finned Tube Bundle: Utilizing L/KL/LL tension-wrapped or extruded aluminum fins on seamless base tubes to maximize air-side heat exchange efficiency.
Material Grades for Corrosive & Extreme Conditions:
Stainless Steels: ASTM A213/A240 304/304L, 316/316L, 321, 347H.
Duplex & Super Duplex: UNS S31803 / S32205 (Duplex 2205), UNS S32750 (Super Duplex 2507) for sour gas (H₂S) and high-chloride process streams.
Nickel Alloys: Monel 400 (UNS N04400), Inconel 625 (UNS N06625), Incoloy 825 (UNS N08825), Hastelloy C276.
Copper & Titanium: CuNi 90/10, CuNi 70/30, Titanium Grade 2 / Grade 12 for high-velocity seawater cooling.
| Core Component | Design & Manufacturing Options | Structural Function in Shell & Tube Heat Exchanger Equipment |
|---|---|---|
| Heat Exchanger Tubesheet | Heavy Forged Carbon/Alloy Steel, Stainless Clad, Monel Clad Plates | Forms the primary pressure boundary between shell and tube streams. CNC drilled with double-grooved tube holes for torque-controlled expansion or strength welding. |
| Heat Transfer Tubes | Plain Seamless, Low-Fin, or Extended Finned Tube Bundle | Conducts thermal energy between isolated fluid streams. Precision cold-drawn with controlled outer diameter (OD) and wall thickness tolerances. |
| Segmental Baffles | Single-Segmental, Double-Segmental, Rod Baffles | Directs shell-side flow perpendicular to tubes to enhance turbulence while maintaining mechanical support against sagging and vibration. |
| Tie Rods & Spacers | High-Tensile Carbon Steel, Stainless Steel Rods | Locks baffle plates rigidly in position along the longitudinal axis of the tube bundle, preventing baffle displacement during bundle insertion. |
| Impingement Plates | Heavy Alloy Wear Plates Mounted Under Shell Inlets | Protects outer tube rows from high-velocity liquid droplet erosion and fluid impulse fatigue near process inlet nozzles. |
Direct Tubing Mill Control: Fully integrated manufacturing eliminates third-party raw material delays, maintaining precise wall thickness uniformity and surface finish along the entire tube length.
Controlled Tube-to-Tubesheet Joining: Automatic orbital TIG welding, combined with torque-controlled hydraulic tube expansion, guarantees zero-leakage mechanical integrity under cyclic pressure conditions up to 25 MPa.
Cold Bend Stress Relieving: Precision-bent u tube bundle radiuses are heat treated in accordance with TEMA and ASME specs to relieve residual stresses and restore resistance against Stress Corrosion Cracking (SCC).
100% Quality Verification: Eddy Current Testing (ET) on tubing, Hydrostatic Pressure Testing, Liquid Penetrant Inspection (PT) on weld overlays, Radiographic Testing (RT), and Positive Material Identification (PMI).
Managing Flow-Induced Vibration (FIV): Shell-side cross-flow velocity must be calculated during thermal sizing. Improper baffle spacing leads to acoustic resonance and tube-to-baffle fretting wear. Incorporating rod baffles or reducing unsupported tube length resolves FIV failure in high-velocity gas coolers.
Tube Hole Pitch & Cleaning Clearance: When replacing a tube bundle for heavy crude service, selecting a 90° or 45° square pitch provides continuous cleaning lanes for mechanical hydro-blasting, unlike dense 30° triangular layouts.
Preventing Baffle-to-Shell Bypass: Dimensional clearances between the outer edge of the baffle plates and the inner diameter of the shell & tube heat exchanger shell must strictly adhere to TEMA standards to prevent bypass streams, which degrade overall heat recovery efficiency.
Petroleum Refining: Crude Distillation Unit (CDU) feed preheat bundles, hydrocracker high-pressure cooling cores, and amine treating units.
Natural Gas Processing: Amine gas sweetening reboilers, propane chiller cores, and offshore platform production modules.
Petrochemical Plants: Ethylene plant quench exchangers, overhead condensers, and aromatics fractionating trains.
Power & Chemical Utilities: High-pressure feedwater heater bundles, boiler blowdown units, and surface condensers.
Contact our engineering team to request technical assistance or custom quotes for replacement u tube bundle units, extended finned tube bundle cores, or heavy forged heat exchanger tubesheet plates:
Company: Yuhong Group Co., Ltd.
Website: www.tema-heatexchanger.com
Direct Email: jimmy@steelseamlesspipe.com
Design Standards: ASME VIII Div 1, TEMA Class R/B/C, API 660, PED 2014/68/EU, ISO 9001
