Smooth and innergrooved tubes

K65 - Sustainable and efficient

Sustainable and efficient – two keywords that have had a decisive impact on our time and have gained in relevance in recent years, especially in refrigeration. Increased environmental awareness in society and industry has therefore led to a kind of renaissance of natural refrigerants, especially CO₂. Wieland supports this turnaround with a tube system that meets the high requirements of CO₂ as a refrigerant.

Wieland K65 tubes have been designed for CO₂ applications in the commercial field, especially that of supermarket refrigeration systems. Wieland K65 alloy provides the mechanical strength high enough to withstand the high operating pressures of CO₂. At the same time, K65 tubes have outstanding processing properties, similar to those of standard copper (Cu-DHP/C12200). 

All Wieland K65 tubes are available in the soft condition (R300/O61) to ensure excellent bending / flaring and collaring properties.

Wieland K65 tubes are offered from stock in two pressure ranges, 80 bar and 120 bar, and in dimensions ranging from 3/8” up to 2-1/8”.

Moreover, K65 tubes are also available in individual dimensions and different delivery forms.
For industrial processing, in particular CO₂ heat exchanger (evaporator / gas cooler) manufacturing, level wound coils (LWC) are offered.

More K65 products in other categories

• K65 in Refrigeration and medical gas tubes
• K65 Industrial tubes innergrooved

Your benefits

• Pressure resistance tailormade to your needs
• Cost reduction through weight reduction
• Proven processing technology: brazing instead of welding!
• Excellent heat transfer
• Design according to EN 14276 - TUEV or UL certification on demand

Typical applications

• Components of R744 refrigeration systems
• Fin coil heat exchangers for higher operation pressures (e.g. R744 evaporators or gas coolers )
• Shell and tube heat exchangers for higher operation pressures (e.g. R744 evaporators or gas coolers)

Technical properties

• Material: K65
• Conditions: soft R300/O61 and hard R420/H80 
• Delivery form: Level wound coils or straight lengths
• Coil weights: 100 kg, 150 kg, 300 kg
• Available dimensions: 5 - 28 mm for LWC; 5 - 110 mm for straight lengths
• Usual standards: EN 12735-1 / EN 14276 / ASTM B 1017

Further information

• K65 Brochure
• Saxonia Brazing recommendation
• K65 Website

cuproclima

For high-quality seamless inside smooth or innergrooved copper tubes in level-wound coils for the refrigeration and air-conditioning industries. The specified quality and inspection criteria exceed the existing requirements of standards (e. g. EN 12735-2, ASTM).

Your benefits

• longer run time for machines when uncoiling tubes
• reduced scrap for finished products
• reduced set-up time
• detection of even smaller surface defects on the tubes
• possible malfunctions of finished equipment during pressure testing are reduced
• fewer impurities in the refrigerant circuit.

Fields of application

• air-cooled heat exchangers for the air-conditioning and refrigeration industry
• evaporators
• condensers
• heat exchangers
• air coolers

Technical Properties

• Materials Cu-DHP
• Conditions soft and extra soft
• Delivery form level wound coils only
• Coil weights  100 kg, 150 kg, 300 kg
• Available dimensions 4 - 28 mm, wall thicknesses on request

Copper tubes with ultra clean inner surface for industrial applications

Our innovative production process for cuproclean tubes removes carbon film. This results in higher reliability, longer life and reduced maintenance costs.It is suitable for all fresh water applications. Copper offers outstanding versatility and is characterized by excellent formability as well as good processing properties. cuproclean copper tubes are also available in combination with other qualities such as cuproform.

Your benefits

• ultra-clean tube surface free from carbon film
• highest reliability and longer life also in fresh water applications
• best corrosion resistance
• carbon film test according to EN 1057 and confirmation in the certificate

Fields of application

• cooling ceilings
• solar water heating systems
• heat generators

Technical properties

• Materials Cu-DHP 
• Conditions Soft 
• Delivery form Level wound coils 
• Coil weights 100 kg, 150 kg, 300 kg
• Available dimensions 6 - 28 mm, wall thicknesses on request

High formable copper tubes

In boiler manufacture, for example the tubes may be formed by: expanding, bending, upsetting and beading. Industrial copper tubes from conventional production do not always meet these high demands. Therefore, it is often necessary to use additional fittings made from other materials. This results in further production steps and consequently higher production costs.

Your benefits

• no special fittings necessary; this results in lower costs of production
• higher added value in your production
• exceptional forming properties – 80% expansion of the tube end tested and certified on the inspection certificate
• less scrap with very high deformation

Fields of application

• Connecting pieces, e.g. especially for boilers

Technical properties

• Materials Cu-DHP 
• Conditions soft and extra soft
• Delivery form Layer-wound coils and straight lengths
• Coil weights 100 kg, 150 kg, 300 kg, 530 kg
• Available dimensions 6 - 28 mm for LWC; 6 - 64 mm for straight lengths

Copper tubes with high-purity outer surface for solar thermal applications

In the process of manufacturing solar heat absorbers requirements vary depending on the application. In the solarclean family you will find the most suitable copper tube quality for your optimized fabrication.

solarclean classic
The particularly clean tube surface ensures a high quality weld. You can therefore save at least one cleaning operation or an extensive pre-treatment of the components to be welded.

solarclean HP
For heat pipes in vacuum tube collectors - highest surface cleanliness on tube outside and inside prevents contamination of the heat transfer medium in the heat pipe and yet ensures the efficiency of the system.

solarclean plus
Improved forming properties for the fabrication of meander-shaped absorber tubes facilitate the setting of the bending machines and increase process reliability. solarclean_plus ensures super clean tube surfaces substantially improving the ultrasonic welding process.

solarclean eco
The cost-effective alternative for laser welding of absorber plate and tubing with sufficient cleanliness.

solarclean SL
Like solarclean classic, solarclean SL ensures superclean tube surfaces. Depending on your fabrication needs, you can also order solarclean in straight lengths.

Technical properties

• Materials Cu-DHP 
• Conditions hard, hard relaxed, half-hard
• Delivery form Layer-wound coils and straight lengths
• Coil weights 100 kg, 150 kg, 300 kg, 530 kg
• Available dimensions 6 - 15 mm; wall thicknesses 0.3-1.2 mm