Natural and safe cooling with the K65 system
In refrigeration, particularly in the field of supermarket refrigeration systems, ecology-oriented plant concepts are increasingly being used. The K65 system is optimized for the special requirements of natural refrigerants.
Environmentally friendly refrigerants such as CO2 R744 require piping systems that are approved for operating pressures of up to 130 bar. The Wieland-K65 tubes and the range of K65 brazing fittings from IBP Conex | Bänninger is a system for high-pressure applications based on copper. It is characterised by the usual ease of processing and the excellent heat transfer properties of copper.
For high pressures the K65 system is a unique combination of tubes and fittings. With K65, Wieland and IBP Conex | Bänninger offer an easy-to-use and safe complete system.
Your benefits
- Cost reduction through reduction in unit weight
- Excellent heat transfer
- Proven processing technology: brazing instead of welding!
- Safety through two well-known manufacturers
- TÜV certified
K65 Installationtubes
Learn more about the dimensions and technical data of Wieland K65 installation tubes.
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K65 Fittings
Here you will find information about the types and dimensions of the K65 fittings.
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K65 Industrial tubes
Find out more about Wieland K65 industrial tube.
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K65-System. Specifically.
Wieland-K65 can be processed as well as copper. Find out more about the material properties, processing options and our certifications.
Data and Facts
Refrigerants
Safety refrigerants, particularly for the refrigerant CO2.
Further fluids are possible after consultation with the manufacturer.
Material
- K65, CuFe2P nach EN 12449
- Fe 2.10 – 2.60 %
- Zn 0.05 – 0.20 %
- P 0.015 – 0.15 %
- Pb 0.03 % max.
- Cu balance
Temper K65-tubes
- R300 according to EN 12449 and VdTÜV 567 (heat treated)
- R420 according to EN 12449 (hard as drawn)
Corrosion resistance
K65 tubes are insensitive to stress corrosion cracking and exhibits high resistance to natural atmosphere.
Standards and specifications
- EN CuFe2P (according to EN 12449)
- CW107C
- VdTÜV Material Sheet 567 (12/2012)
- UNS* C19400
* Unified Numbering System (USA)
Physical properties
- Thermal conductivity >260 W/(mK)
- Density 8,91 g/cm3
- Coefficient of thermal expansion 17,6·10-6/K
* Reference values at room temperature
Further information can be found here:
K65 Tubes and Fittings
K65 Industrial tubes
K65 Data sheet
Processing
The processing properties of Wieland-K65 are similar to those of copper. The joining properties are also comparable. Therefore, K65 tubes and K65 fittings can be joined using the simple and reliable brazing technology which is already common and proven practice for copper in the refrigeration industry.
There is a recommendation from Saxonia regarding the selection of a suitable brazing solder.
Minimum bending radii of K65 for manual bending
| Outer diameter |
Wall thickness |
Minimum bending radius |
| inch |
mm |
mm |
mm |
| 3/8" |
9.52 |
0.66 |
43 |
| 1/2" |
12.70 |
0.85 |
52 |
| 5/8" |
15.87 |
1.05 |
63 |
| 3/4" |
19.05 |
1.30 |
75 |
| 7/8" |
22.23 |
1.50 |
98 |
| 1 1/8" |
28.57 |
1.90 |
102 |
| 1 3/8" |
34.92 |
2.30 |
140 |
| 1 5/8" |
41.27 |
2.70 |
140 |
| 2 1/8" |
53.97 |
3.55 |
not defined |
The dimensions mentioned here can be cold bent with suitable bending equipment and bending segments that are precisely tailored to the outside diameter. Hot bending is not recommended.
Industrial bending machines also enable tighter bending radii.
Bending of hairpins is possible on suitable bending equipment.
Certificates
Manufacturer approvals for AD 2000
Wieland-Werke AG, Ulm, Germany
Wieland Buntmetalle, Amstetten, Austria
IBP Atcosa S.L., Cordoba, Spain
Manufacturer approval for production according to Pressure Equipment Directive
Wieland-Werke AG, Ulm, Germany
Wieland Buntmetalle, Amstetten, Austria
IBP Atcosa S.L., Cordoba, Spain
Contact
Would you like to learn more about K65? The experts from Wieland and IBP Conex | Bänninger will be happy to answer your questions.
