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How to use gas welding equipment in supermarket refrigerated showcase (3)
author: supermarket refrigerated showcase category: commercial refrigeration Views: 514Time: 2016-08-22
How to use gas welding equipment in supermarket refrigerated showcase
Carbonized flame is not suitable for welding. When using gas welding equipment to weld the pipeline of the supermarket refrigerated showcase, the flame of the gas welding equipment must be adjusted to a neutral flame before welding. When turning off the welding gun of the gas welding equipment, first turn off the gas control knob, and then turn off the oxygen control knob. Pay special attention to this when performing gas welding operations. For the welding of copper pipes of different materials, the best time to put the welding rod in is different. When welding copper tubes made of phosphorous copper, the best temperature for placing electrodes is 600℃; for copper tubes made of brass, the best temperature for placing electrodes is 1300℃. If the welding temperature is too high, it is easy to cause oxidation of the welding part or weld the copper pipe, which will increase the difficulty of welding; if the welding temperature is not enough, the welding rod will not be completely melted, which will cause welding slag or bumps in the welding part. It is prone to leakage and has an unsightly appearance. When the welded copper pipe reaches the required temperature, it can be notified by the color of its appearance. In the maintenance of supermarket refrigerated showcase, copper pipes are often welded. The welding method is gas welding. Therefore, welding tools and other related tools must be prepared before welding. Since most of the pipelines of the refrigeration system are copper pipes, the welding between the copper pipes usually uses silver welding. The welding rod can be silver electrode or alloy electrode. After the various tools required for welding are prepared, the welding can be carried out. Fuck.
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