Reliable Copper-Aluminum Connecting Pipes with High Tensile
Strength
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 during
the welding process, with no obvious oxide film. In addition, the
reduction of the plug hole (Φ6.3 hole is greater than 3.0mm) must
also meet the standard requirements.
2. Air tightness requirements:
The air tightness requirements of copper-aluminum connecting pipes
are very strict, and a high-pressure test of 4.0MPa is required for
5 minutes to determine whether the connecting pipes are leaking.
During the inspection process, the connecting pipe must remain
stable without any leakage.
3. Pressure resistance performance 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 must not have any
cracks or damage to ensure that it can withstand the high-pressure
environment.
4. Bending performance requirements:
The bending performance requirements of copper-aluminum connecting
pipes are very high. The sample needs to be bent into a bending
core that is twice the nominal diameter of the pipe, and inspected
after bending 180 degrees. The bent pipe should remain smooth and
free of wrinkles and cracks.
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 length of the weld
should be greater than 10mm.
6. Sealing performance requirements:
The sealing performance requirements of copper-aluminum connecting
pipes are very high. The KTG should have shrunk well and the
sealing fittings have melted and been completely wrapped in the
copper-aluminum joint. During the test, the sealing part cannot
rotate or fall off.
Features:
Copper-aluminum air conditioning connecting pipe is an innovative
air conditioning accessory. Through careful design and
manufacturing, it perfectly combines the advantages of copper pipes
and aluminum pipes, bringing many practical improvements to modern
air conditioning systems.
The characteristics and advantages of this connecting pipe are
mainly reflected in the following aspects:
1. Excellent durability and safety: 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, avoiding the risk of electrochemical
corrosion that may occur between the aluminum tube and the brass
parts. This connection method not only improves the durability of
the connecting pipe, but also ensures the stability of its safety
performance during long-term use.
2. Environmental protection advantages: Aluminum is a recyclable
metal. By using aluminum tubes, copper-aluminum air conditioning
connecting tubes not only reduce their own weight, but also reduce
manufacturing costs. More importantly, the recyclability of this
material reduces resource consumption and environmental damage,
contributing to green environmental protection.
3. Efficient thermal insulation performance: Compared with pure
aluminum pipes, the overall thermal insulation performance of
copper-aluminum air conditioning connecting pipes is better. It can
effectively maintain the temperature inside the connecting pipe,
reduce the loss of refrigerant during the transportation process,
thereby improving the cooling or heating efficiency of the air
conditioner. This not only helps save energy but also improves air
conditioning performance.
During the manufacturing process, the copper-aluminum air
conditioning connecting pipe uses advanced welding technology to
ensure the tight combination of the copper pipe and the aluminum
pipe. In addition, its appearance is smooth and flat, and it is
easy to install, further improving the convenience of use.
In general, copper-aluminum air-conditioning connecting pipes have
become an indispensable part of modern air-conditioning systems due
to their unique combination, excellent durability, environmental
protection advantages, and efficient thermal insulation
performance.
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.
