one、Welding combat sharing
1、Adjust the nozzle flame：
(large brass tube)Welding of pipelines requires that the length of the neutral flame is generally20～30cm。The flame is adjusted according to the oxygen、Acetylene gas volume ratio is different，carbonization flame、neutral flame、Three types of oxidizing flames，As shown below：
Oxidizing flame
neutral flame（Neutral flame for copper welding）
carbonization flame
Pay attention to the flame when welding copper pipe fittings，The nature of the flame is determined by the type of metal being welded and its properties，We should reasonably choose to use。Our refrigeration copper pipes（copper）Pipe fitting welding generally uses neutral flame。
The addition position of the solder is above the nozzle 2mm left and right position，And the addition position of the solder must ensure that it is directly behind the flame heating，Melting the hot copper pipe；Make the solder flow evenly、Spread over the crevice surface。
Copper tube heating direction：
(large brass tube)Where and how to add solder
Welding procedure when copper pipes are close together：
Dryer Welding Procedure：
capillary heating method：
Compressor copper tube heating method：
After filling welding is completed，use the flame“Z”The line of the font swings down evenly for heating，Until the added solder fully penetrates into the weld；The function of the lower part of the heating nozzle is to fully melt and penetrate the solder。requires attention，Allow the weldment to cool naturally after welding，Do not use water or cryogenic substances to rapidly cool weldments。
(large brass tube)two、Welding oxidation treatment
Refrigeration equipment manufacturing and engineering installation and maintenance，Welding of each copper tube is often required，But after welding，If the necessary anti-oxidation and anti-corrosion treatment is not carried out，Welds are quickly oxidized and corroded，Affects the overall aesthetics of the device。So how can we carry out anti-oxidation and anti-corrosion treatment quickly and economically?？
Spray with copper anti-corrosion spray paint，Copper spray paint has good orientation，Provides good oxidation protection for copper metal surfaces，Anti-oxidation and anti-corrosion。This process is based on copper purity99.9%Copper spray paint formulated with thin copper powder，good orientation。
Use application effect comparison：
product instructions：
(large brass tube)first step：Wipe the product clean with a towel，remove stains、Oil or scale。
second step：Shake the can a few times before using。
third step：Product spraying with copper anti-corrosion spray paint，The recommended spraying distance is25cmabout。
the fourth step：Finished。
