High Performance Copper-Aluminum Connecting Pipes for Air Tightness
Detailed explanation of technical standards for copper-aluminum
connecting pipes:
1. Quality requirements for welding points:
The welding joints of copper and aluminum connecting pipes must be
free of defects such as pores, cracks, slag, burrs and burns. The
two metals, copper and aluminum, should be completely fused with no
obvious oxide film. In addition, there is no significant reduction
in plug holes, especially for Φ6.3 holes, the plug holes should be
larger than 3.0mm. Such welding points not only ensure the
airtightness of the connecting pipe, but also enhance its
mechanical properties.
2. Air tightness requirements:
The air tightness requirements of copper-aluminum connecting pipes
are very strict. Under a pressure of 4.0MPa, the connecting pipe
needs to withstand a 5-minute test without any leakage. This strict
air tightness requirement ensures the sealing performance of the
connecting pipe, thereby ensuring the stability and safety of the
pipeline system.
3. High voltage test requirements:
After passing the air tightness inspection, the pressure needs to
be slowly increased to 13MPa and maintained for 1 minute. During
this process, the copper-aluminum connecting pipe cannot have any
cracks. This shows that the connecting pipe has excellent
high-pressure resistance and can ensure long-term stable operation
in high-pressure environments.
4. Bending performance requirements:
The bending performance requirements of copper-aluminum connecting
pipes are very high. The specimens were bent into a bend core that
was twice the nominal diameter of the pipe and then bent 180
degrees. During this process, the pipe cannot produce wrinkles or
cracks. This shows that the connecting pipe has excellent
plasticity and toughness and can maintain its shape and structure
in various complex environments.
5. Tensile strength requirements:
The tensile strength requirement of copper-aluminum connecting pipe
is between 65-118mpa. In the tensile test, the tensile part should
be on the side of the aluminum pipe, and the weld seam should be
larger than 10mm. This shows that the tensile strength and weld
quality of the connecting pipe are strictly controlled, ensuring
the stability and durability of the connecting pipe.
6. Sealing performance requirements:
The sealing performance requirements of copper-aluminum connecting
pipes are very high. KTG shrinks well, the sealing parts have
melted and are completely wrapped in the copper-aluminum joint, and
the seal cannot rotate. This sealing performance can ensure the
sealing and stability of the connecting pipe in various
environments, thereby ensuring the safety and long-term reliability
of the pipeline system.
Features:
The copper-aluminum air-conditioning connecting pipe is an
innovative air-conditioning connecting pipe that tightly combines a
section of copper pipe and a section of aluminum pipe through
welding technology to form a composite material with excellent
performance. This kind of connecting pipe not only has the
advantages of high strength, corrosion resistance, lightness, etc.,
but also has good thermal conductivity and insulation properties.
First of all, the copper pipe part of the copper-aluminum
air-conditioning connecting pipe can be perfectly connected with
the brass parts of the internal and external units of the air
conditioner, thereby avoiding the risk of electrochemical corrosion
between the aluminum pipe and the brass parts. This connection
method not only improves the durability and safety of the
connecting pipe, but also ensures the normal operation of the air
conditioning system.
Secondly, the aluminum pipe part of the copper-aluminum air
conditioning connecting pipe can reduce the weight and cost of the
connecting pipe. Aluminum is a lightweight, high-strength metal
material with low density, good thermal conductivity, and easy
processing and shaping, so it can effectively reduce the weight and
cost of connecting pipes. At the same time, aluminum is also a
renewable metal material that will not cause resource shortages or
environmental damage, and meets the requirements of sustainable
development.
Finally, the copper-aluminum air conditioning connecting pipe as a
whole is more insulating than pure aluminum pipes. Since copper and
aluminum have different thermal conductivities and thermal
expansion coefficients, their combination can form an excellent
thermal insulation layer. This kind of insulation layer can
effectively maintain the temperature inside the connecting pipe,
reduce the loss of refrigerant during the transportation process,
and improve the cooling and heating efficiency of the air
conditioner.
To sum up, the copper-aluminum air conditioning connecting pipe is
a composite material with excellent properties. It not only has the
advantages of high strength, corrosion resistance, lightness, etc.,
but also has good thermal conductivity and insulation properties.
The application of this kind of connecting pipe can not only
improve the performance and efficiency of the air conditioning
system, but also reduce costs and environmental impact. It is a
very promising air conditioning connecting pipe material.
Applications:
evaporimeter
condensator
dehumidifier
Cold dry machine
warm air blower
etc.
Techical Parameters:
physical characteristics and composition
1. The bimetallic composite pipe has a tensile strength of 150–160
MPa, an elongation of 35–40%, and a pressure resistance of at least
15 MPa.
2, copper-clad aluminum tube for the integration of materials;
copper and aluminum cannot be separated, as with bending, flaring,
and softness in copper pipe.
3. The pipe's section has a copper to aluminum weight ratio of
60:40, the same specifications as the original copper pipe, and the
same outer diameter and wall thickness.
Air conditioning connection pipe
Model Number | State | Coil |
Outside Diameter /mm | Wall Thickness/m m |
| 1050,1060,1070 | M(O) | 4-22 | 0.24-2.00 |
| H14 |
| 3003,3103 | M(O) |
| H12 |
| H14 |
(Technical requirements refer to national standards or customer
technical quality requirements for production)
FAQ.:
Q1: aluminum alloy pipe compared with copper pipe, advantages and
disadvantages?
A1: Aluminum pipe cost low ductility, but easy to corrosion. Copper
pipes have good thermal conductivity and corrosion resistance, but
the installation, preservation and transportation are not easy and
the cost is high.
Q2: What should be noted in the installation of the air
conditioning connection pipe?
A2: The alloy pipe is easy to install, but the link of copper and
aluminum after a long time of chemical changes, will cause
electrocouple corrosion.
Q3: How to deal with the corrosion problem?
A3: Our products use special corrosion resistant alloy, and the
corrosion resistance effect is greatly improved compared with
ordinary aluminum alloy. The corrosion resistance experiment is>
1000 hours, which greatly improves the service life of the product.
Q 4: What state and performance of aluminum pipe and aluminum alloy
pipe can be produced?
A 4: It can produce performance products from hard state to soft
state and interval.
