Brass tube: A type of non-ferrous metal tube, which is a pressed and drawn seamless tube. Copper tubes are strong and corrosion-resistant, and have become the first choice for modern contractors to install water pipes, heating and cooling pipes in all residential commercial houses. Brass tubes are the best water supply pipes.
Brass tube characteristics:
Brass tubes are light in weight, have good thermal conductivity, and high low-temperature strength. They are often used to manufacture heat exchange equipment (such as condensers, etc.). They are also used to assemble low-temperature pipelines in oxygen production equipment. Copper tubes with small diameters are often used to transport pressurized liquids (such as lubrication systems, oil pressure systems, etc.) and as pressure gauges for instruments. Brass tubes are strong and corrosion-resistant.
It mainly has the following advantages: Copper tubes are hard, not easy to corrode, and are resistant to high temperature and high pressure. They can be used in a variety of non-copper environments. Compared with brass tubes, the shortcomings of many other pipes are obvious. For example, galvanized steel pipes, which were used more in residential buildings in the past, are very easy to rust. After a short period of use, problems such as yellowing of tap water and reduced water flow will occur. Some materials will rapidly reduce their strength at high temperatures, which will cause unsafe hazards when used in hot water pipes. However, since the melting point of copper is as high as 1083 degrees, the temperature of the hot water system will have little effect on brass pipes. Common brass pipes include brass pipes for electrical appliances, brass pipes for refrigeration, high-pressure brass pipes, corrosion-resistant brass pipes, brass pipes for connections, brass pipes for waterways, electric heating brass pipes, and industrial brass pipes.
The mechanical properties of brass pipes are shown in the table below:
Precautions for brass tube welding:
1. During welding, always keep the flame covering the joint to prevent air from entering;
2. The flux will be dried out, the water will evaporate at 100℃, and the flux will turn milky white;
3. The flux will bubble at 316℃;
4. The flux will become paste at 427℃;
5. The flux will become fluid at 593℃, close to the copper welding temperature;
6. Solder containing 35%-40% silver will melt at 604℃ and flow at 618℃;
7. Pay attention to the two workpieces to be welded. Use a welding torch to heat;
8. The color of the flame can be used to observe whether the temperature is appropriate. When the temperature reaches the copper welding temperature, the flame will appear green, and when it reaches the silver welding temperature, the green flame indicates that the temperature is appropriate;
9. To weld copper pipes and steel pipes to each other, the copper pipe must be heated first (because the copper pipe conducts heat quickly and requires more heat);
10. During the copper welding process, the welding torch should not always stop at one point, but can be moved in an 8-shaped shape;
11. It is recommended to use a large welding torch, so that a soft flame can be used to obtain high heat without overpressure or "blowing". It is best to have a slight feather glow on the internal conical flame.
Brass pipe: weight per meter = 0.02670*wall thickness* (outer diameter-wall thickness)
