How to weld air conditioning copper pipes

1. Connect the blue tube of the welding torch to the oxygen tank and the red tube to the fuel tank. Check whether the welding torch is normal. If the welding torch is normal, slowly open the fuel valve and ignite it.

2. Then open the oxygen valve and adjust the flame to a blue flame. First use the outer flame to bake the joint slightly to preheat. Then use the blue flame to heat the weld and place the welding rod close to the flame to preheat. hot.

3. When the welding seam of the copper pipe turns red, place the welding rod on the welding seam, and use a blue flame to heat the welding seam and the welding rod at the same time until the welding rod melts and fills the welding seam, and the welding is completed.

Air-conditioning copper pipes - Precautions for welding air-conditioning copper pipes:

1. Welding copper pipes must be brazed, also called oxygen welding, gas welding, various names , our company is called brazing. The combustion gas is a mixed burning flame of liquefied petroleum gas and oxygen for welding.

2. Air-conditioning copper pipes are generally thin, with wall thickness generally around 0.3-1.2mmz, so you must pay attention to the heating time when welding. If the heating temperature exceeds 600 degrees, the copper pipe will melt in 0.03 seconds. , called melting.

3. After welding, it is generally cooled with clean cold water. Avoid oxidation. Nitrogen is generally introduced into the tube to protect it from oxidation.

4. Brazing flame is divided into oxidizing flame, reducing flame and neutral flame. Generally, a reducing flame is used for welding to ensure the quality of copper pipes.

5. Generally do not pull the solder joints hard, because the solder will crack.

6. When welding, you need to prepare some things related to the welding process, such as the welding rod used for welding, the fuel used for welding is generally natural gas or butane, the supporting gas used during welding is oxygen, and There are welding tools and torches.

7. When everything is ready, start the welding operation. Things to note when welding are that when operating the gas cylinder, the gas cylinder must be upright, and the distance between the oxygen cylinder and the natural gas cylinder should be as close as possible to an open flame. It should be more than 5 meters, which is a safe distance.

8. Is the connection method between the welding torch and the gas cylinder correct? There should also be a certain distance between the copper pipe and the copper pipe fittings. Wear protective glasses when operating, and be sure to wear protective glasses at the welding site. Fire extinguishing equipment must be placed, and the welding area must be well ventilated.