• Products
  • Solutions
  • Services
  • Company
  • Career
    Tubes
    Finned Tubes

    Enhanced Surface Evaporator Tubes

    Wieland’s Enhanced Surface Evaporator Tube combines advanced nucleate‑boiling technology from the GEWA‑B and GEWA‑PB families to deliver outstanding heat‑transfer performance in shell‑and‑tube heat exchangers. Its engineered boiling surface, and optional dual‑enhanced structure with inner spiral fins, significantly boosts thermal efficiency, enabling more compact designs, lower refrigerant charge, and improved energy performance in flooded and falling‑film evaporators.
    Additional information

    Material overview

    ASTM-UNS No.    		 Wieland Designation ⁠EN Designation EN No. JIS No. Data Sheet
    C12200    		 KU1 Cu-DHP CW024A - -
    C70600    		 L10 CuNi10Fe1Mn CW352H - -
    K01200    		 O41 - - - -
    Overview Product Variants Certification Typical Applications

    Enhanced surface evaporator tubes – for optimized boiling performance

     

    Our evaporator tubes feature enhanced outer and inner surfaces optimized for refrigerant boiling, delivering excellent heat transfer performance. The portfolio offers application-specific solutions for maximum efficiency, drop-in replacements, high-viscosity and fouling media, as well as demanding process industry applications.

    Key Benefits

     

    • Optimized heat transfer coefficients
    • Increased heat transfer on shell and tube side 
    • Superior overall heat transfer performance 
    • More compact heat exchanger designs
    • Reduced refrigerant charge 
    • Improved life cycle energy efficiency 
    • CAPEX and OPEX savings potential 
    • Minimizing CO₂ emissions during operation

    Product variants

     

    • B6 & B7 – for highest performance and efficiency
    • B4HSL – weight optimized, drop-in applications
    • BHV – for media with high viscosities
    • BLF / BPL – for high fouling applications

     

    Discover our design software for condensers and evaporators - ThermalX
    Click here for more information about available tube dimensions

     

    Certification

     

    • DIN EN 12452 / EN 10216-2
    • DIN 17679 and VdTÜV 420 / 5 for use in pressure vessels
    • ASTM B 359 / ASME SB-359 / ASTM A-498
    • Certification for use in pressure vessels has been obtained with AD-Merkblatt W0 / TRD 100
    • Certificates 3.1 / 3.2 according to DIN EN 10204

    Typical Applications

     

    Enhanced evaporator tubes are primarily applied in:

    • Flooded evaporators in packaged chillers
    • Falling-film evaporators in packaged chillers
    • Air-conditioning industry
    • Refrigeration industry
    • Bulk boiling of refrigerants and similar fluids

     

    Downloads

    Similar Products

    Tubes
    Finned Tubes

    Enhanced Surface Evaporator Tubes for the Hydrocarbon Industry

    Wieland GEWA-PB is a dual-enhanced boiling tube for shell-and-tube heat exchangers, available in carbon steel and low-temperature carbon steel grades. Designed for LNG refrigeration systems, ethylene reboilers, condensers and other hydrocarbon processing applications, it delivers enhanced heat transfer, compact equipment designs and reduced operating costs.
    Tubes
    Finned Tubes

    Enhanced Surface Condenser Tubes

    Optimized heat transfer for your shell and tube heat exchanger with enhanced surface tubes of the GEWA-C product family. They are engineered to maximize shell‑side condensation efficiency in modern HVAC and refrigeration systems.
    not defined Seawater-resistant copper-nickel alloy Iron and Steel Stainless Iron and steel +1
    Tubes
    Finned Tubes

    Low-finned Tubes

    Wieland low-finned tubes offer a proven, reliable solution for controlling the temperature of gases and liquids, and for evaporating and condensing refrigerants. Their larger heat transfer surface versus plain tubes delivers material and fill-volume savings for refrigeration and air conditioning, oil and gas coolers in machinery and plant engineering, and process engineering. Available as GEWA-K and GEWA-KS in copper, copper-nickel, brass, steel, or titanium.
    Tubes
    Finned Tubes

    High-finned Tubes

    High-finned tubes have a much greater outer surface area than smooth tubes. This allows for particularly compact designs. Thanks to their high, thin fins, these tubes perform particularly well in the heating and cooling of liquids and gases, making them an excellent choice for applications in heating technology, as well as in machinery and plant engineering.
    Aluminum Oxygen-free Pure Copper Seawater-resistant copper-nickel alloy
    Tubes
    Finned Tubes

    Medium-high-finned Tubes

    Medium-high-finned tubes feature a significantly larger heat transfer surface area compared to plain tubes. They are ideal for compact and high-performance coils and shell-and-tube heat exchangers. Wieland medium-high-finned tubes are a proven and robust solution for water heaters, storage tanks, refrigerant condensers, oil coolers, gas coolers or safety heat exchangers and more.
    Aluminum Oxygen-free Pure Copper Seawater-resistant copper-nickel alloy Iron and Steel +1
    Tubes
    Finned Tubes

    Safety Tubes

    Safety tubes are used for economical and safe heat transfer. The double wall tubes feature defined leakage paths for the absolutely reliable separation of fluids. For your individual requirements concerning fluid dynamics, we decide on the most suitable surface structure.