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The connection process of walk-in cooler refrigeration pipes
author: supermarket refrigerated showcase category: walk-in display coolers Views: 518Time: 2016-08-22
The connection process of walk-in cooler refrigeration pipes
There are generally three connection methods for refrigeration pipes: welding, threaded connection and flange connection.
1) Welding is the main connection method of walk-in cooler refrigeration system pipes. Electric welding, silver brazing, brazing, etc. can be used. It is widely used because of its high strength and good tightness. Among them, silver brazing is best used for welding of copper tubes. Electric welding is generally used for seamless steel pipes, and gas welding is not suitable.
2) The threaded connection is mainly used for the connection of the copper pipe of the Freon system that needs to be frequently disassembled during maintenance. Its connection form has two kinds of full joint connection and half joint connection, generally half joint connection is used more. When the pipe is threaded, the oil on the thread should be cleaned with gasoline or kerosene, and the filler should be wiped dry. The filler should not be squeezed into the pipe mouth when connecting. The filler used for threaded connection of high-temperature pipe sections should use a blend of lead oxide and glycerin. The bell mouth of the red copper pipe used for threaded connection shall not have cracks. The pipe end of the bell mouth should be annealed first, and the oxide layer should be wiped off after annealing. After the threaded connection is put on the copper pipe, the pipe mouth is expanded into a bell mouth shape, and then the female thread of the buckle is connected with the male thread of the joint and tightened.
3) Flange connection is used to connect pipes and equipment, accessories or valves with flanges. The use of the above three connection methods depends on the specific situation of the walk-in cooler. Under normal circumstances, the welded device is not easy to leak, and the threaded connection or flange connection is convenient for disassembly and inspection. Therefore, it is better to use welding where there is no need for disassembly and inspection: threaded connection or flange connection can be used for parts that require frequent disassembly and inspection.
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