Brass is an alloy of copper and zinc. If it is only composed of copper and zinc, it is called ordinary brass. Brass is often used to make valves, water pipes, connecting pipes of air conditioners and radiators.
Brass tubes are generally used to make heating coil tubes for condensers and coolers and tubes for general purposes. Brass 68 and 70 for condensers and 62 for general purpose cold drawn tubes from 3 to 100 cm OD. Its length is 1-6 meters.
Tubes for condensing cooler and other heat exchange equipment shall be subject to water pressure test with pressure up to 50 kg / cm2, and the test time shall not be less than 10 seconds.
Compared with the shell and tube heat exchanger, the brass tube has the following advantages:
1. High heat transfer coefficient, which is due to high velocity, turbulence and complete countercurrent;
2. The weight of equipment required for unit heat transfer is small;
3. The compensation of temperature deformation is good.
What are the characteristics and uses of brass tubes:
Brass tubes has many advantages in one body. It has high strength of general metal, and it is easy to bend, twist, crack and break compared with general metal. It also has certain frost resistance and impact resistance. Therefore, once installed, the copper tubes in the water supply system in the building can be used safely and reliably, even without maintenance.
Brass tubes also have the characteristics of hard texture, corrosion resistance, high-temperature resistance and high-pressure resistance, which can be used in various environments. Compared with this, the disadvantages of many other pipes are obvious. For example, in the past, the galvanized steel pipes used in residential buildings were easy to rust.
If they were used for a short time, the tap water would turn yellow and the water flow would become smaller. The strength of some other materials will decrease rapidly under high temperatures, which will cause unsafe risks when used in hot water pipes. The melting point of copper is as high as 1083 ℃, and the temperature of the hot water system is negligible for copper pipes. Now it is generally used as a copper pipe for electrical appliances, refrigeration, high-pressure, corrosion-resistant, connection, water channel, electric heating, and industrial purposes.
In addition, because Murphy Thermal brass tubes have the characteristics of firmness and corrosion resistance, it has become the first choice of modern contractors in the installation of water pipes, heating, and cooling pipes in all residential commercial houses. At the same time, it has the characteristics of lightweight, good thermal conductivity, and high low-temperature strength.
It is often used to manufacture heat exchange equipment (such as condenser) and also used to assemble low-temperature pipeline in oxygen production equipment. Small diameter copper pipe is often used to transport pressure liquid (such as lubrication system, oil pressure system, etc.) and pressure pipe used as an instrument.
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