Brass is an alloy composed of copper and zinc. If it is only composed of copper and zinc, it is called general brass. Brass is often used to make valves, water pipes, connecting pipes for internal and external air conditioners, and radiators. the
Brass tubes are generally used to make heating coils for condensers and coolers and tubes for general purposes. Brass tubes use brass No. 68 and No. 70 for condensers and No. 62 brass for general-purpose cold-drawn pipes from 3 to 100 cm in outer diameter. Its tube length is 1-6 meters. the
Tubes used in condensing coolers and other heat exchange equipment should be subjected to a hydrostatic test with a pressure of 50 kg/cm2, and the test time should not be less than 10 seconds. the
Compared with the shell-and-tube heat exchanger, the brass tube has the following advantages in the recently applied heat exchanger:
1. High heat transfer coefficient due to high flow velocity, turbulent flow and thorough counterflow;
2. The equipment required for unit heat transfer is small;
3. Good compensation for temperature deformation.
What are the characteristics and uses of brass tubes
Brass tubes combine many advantages, have the high strength of ordinary metals, and are easier to bend, change, crack, and break than ordinary metals, and have certain frost heaving and impact resistance capabilities. Therefore, the water supply system in buildings Once installed, the copper water pipes in the house are safe and reliable to use, even without maintenance and maintenance. the
The brass tube also has the characteristics of solid texture, not easy to corrode, high temperature and high pressure resistance, and can be used in various environments. Compared with this, the disadvantages of many other pipes are obvious. For example, the galvanized steel pipes used in the past are very easy to rust, and the running water will turn yellow and the water flow will become smaller after a short period of use. There are also some materials whose strength will decrease rapidly at high temperatures, and will cause unsafe hazards when used in hot water pipes, while the melting point of copper is as high as 1083 degrees Celsius, and the temperature of the hot water system is negligible for copper pipes. Now it is generally used as copper tubes for electrical appliances, copper tubes for refrigeration, high-pressure copper tubes, corrosion-resistant copper tubes, copper tubes for connections, copper tubes for waterways, electric heating copper tubes, and industrial copper tubes. the
In addition, because of its strong and corrosion-resistant properties, brass pipes have become the first choice of modern contractors for tap water pipes, heating and cooling pipes in all residential commercial buildings. At the same time, it has the characteristics of light weight, good thermal conductivity, and high low-temperature strength. It is often used in the manufacture of heat exchange equipment (such as condensers), etc., and is also used to assemble low-temperature pipelines in oxygen-generating equipment. Copper tubes with small diameters are often used to transport pressurized liquids (such as lubrication systems, oil pressure systems, etc.) and pressure measuring tubes for instruments.
