|
| Brand Name: | YUHONG |
| Model Number: | ASTM A106 GR.B Tube with 0.5mm CU-T2 Embedded Fins |
| MOQ: | 200~500 KGS |
| Price: | Negotiable |
| Payment Terms: | T/T,L/C |
| Supply Ability: | According to Clients' requirements |
Combining a carbon-steel tube with 0.5mm CU-T2 embedded fins targets the root causes of the pain points. First, the high thermal conductivity of copper fins significantly enhances local heat transfer coefficients, improving overall exchanger effectiveness and allowing either smaller heat-exchanger surface areas or higher throughput for the same footprint. This reduces fuel consumption and operational costs—an immediate benefit in fuel-intensive power plants. Second, embedding fins mechanically rather than bonding or brazing minimizes the risk of fin detachment under thermal cycling and vibration, reducing unscheduled maintenance and replacement costs.
Third, the choice of ASTM A106 GR.B for the tube body maintains necessary pressure resistance and structural integrity in steam and high-temperature applications while keeping material costs lower than full-copper designs. The solution also mitigates fouling and scaling impacts. Enhanced local turbulence from fin geometry and close fin pitch improves heat transfer despite fouling layers, maintaining higher thermal efficiency between cleanings. Where corrosion is a concern, targeted surface treatments or external protective coatings can be specified on the carbon-steel tube to extend service life without negating the thermal advantages of copper fins. Moreover, the modular nature of embedded-fin tube bundles simplifies replacement and inventory management—critical when plants require quick turnarounds during outages.
| Carbon, max | Manganese | Phosphorus, max | Sulfur, max | Silicon, min | Chromium, max | Copper, max | Molybdenum, max | Nickel, max | Vanadium, max |
|---|---|---|---|---|---|---|---|---|---|
| 0.30 | 0.29–1.06 | 0.035 | 0.035 | 0.10 | 0.40 | 0.40 | 0.15 | 0.40 | 0.08 |
| Tensile Strength | Yield Strength | Elongation |
|---|---|---|
| ≥415 MPa | ≥240 MPa | ≥22% |
| Tensile Strength | Elongation |
|---|---|
| ≥195 MPa | ≥30% |
· A spiral groove of a specific shape is cut or rolled onto the outer surface of the carbon steel base tube.
· A T2 copper strip (with a thickness of 0.5mm) is then mechanically embedded into this groove. The plastic deformation of the copper creates a tight mechanical interlock with the steel groove.
· Compared to welding or brazing, this mechanical connection effectively avoids the thermal stress generated due to the difference in coefficients of thermal expansion between the two metals during high-temperature cycling, significantly reducing the risk of fin detachment.
Core Advantages
Superior Cost-Effectiveness
Provides performance comparable to all-copper or all-stainless-steel tubes at a significantly lower material cost, offering an optimal balance between capital expenditure and lifecycle value.
High and Reliable Thermal Performance
The ultra-high thermal conductivity of the pure copper fins (approx. 8x that of steel) ensures efficient heat transfer on the gas/air side.
Performance remains stable across a wide service temperature range (-29°C to 565°C) and under high internal pressure (e.g., >16 MPa), thanks to the robust carbon steel base tube.
Enhanced Operational Reliability & Reduced Lifecycle Cost
The mechanical interlock of the embedded fin design virtually eliminates fin detachment under thermal cycling and vibration, drastically reducing unscheduled maintenance.
Improves overall plant efficiency (e.g., in economizers), leading to lower fuel consumption and operating costs.
The modular design allows for easier partial replacement, minimizing downtime during outages.
