What is the difference and function of heat tube and cold tube

1. Process.

Cold plating is the process of using electrolysis to form a uniform, dense, well-bonded metal or alloy deposition layer on the surface of a workpiece.

Hot plating is a process method in which the plated part is immersed in a molten metal liquid to form a metal coating on its surface.

2. Galvanizing of pipe wall.

The coolness is galvanized on the outer pipe wall.

The heat is galvanized on both the inner and outer pipe walls.

3. Corrosion resistance.

Hot dip has strong corrosion resistance.

Weak cold corrosion resistance.

4. Applicability.

Heat is widely used in the production of low-melting point metals zinc, tin, aluminum, lead and their alloy coatings.

Cooling is widely used to protect steel parts, especially against atmospheric corrosion.

The function of cold galvanization is to prevent steel objects from being corroded, improve the corrosion resistance and service life of steel, and also make the product increase the decorative appearance, steel will be weathered over time, water or soil corrosion.

The function of hot-dip pipe is to prevent corrosion and has a certain decorative effect.

The "hot-dip" tube is the "hot-dip plating" tube, also called the "fire plating" tube. The inner cavity and outer wall of the hot-dip plating tube have coating, and the coating is thicker than electroplating, up to more than 40 microns, and has good corrosion resistance. It is commonly used in water pipes.

"Cool" tube refers to "electroplated" tube. The outer wall of the plating tube is plated, and the inner cavity cannot be plated. The electroplating layer is relatively thin, less than 20 microns, and the corrosion resistance is poor. It is commonly used for structural parts.

The hot-dip galvanized skin looks brighter, while the cold-dip galvanized skin is relatively dark and blue. Hot-dip galvanizing is a bit more expensive.

The "hot-dip" tube is the "hot-dip plating" tube, also called the "fire plating" tube.

The inner cavity and outer wall of the hot-dip pipe are coated, and the coating is thicker than the electroplating, up to more than 40 microns, and has good corrosion resistance. It is commonly used in water pipes.

"Coolness" tube refers to "plating" tube.

The outer wall of the electroplating pipe has a coating, and the inner cavity cannot be electroplated, and the plating layer is relatively thin, only less than 20 microns, and the corrosion resistance is poor. It is commonly used for structural parts.

Compressed air is fed into the vortex tube and rotates at high speed to one side, during the movement of this air flow, the outer layer of air will heat up, on the contrary, the inner layer of air will become cold, (the heat and cold heat are proportional to the flow rate), and when it moves to one end, the cold air will flow back along the center of the vortex in the opposite direction, forming a cooling source.

The AIRTX vortex tube perfectly combines the pursuit of low temperature and the pursuit of high cooling efficiency ratio to calibrate the cooling performance of the vortex tube, which not only avoids ignoring the cooling efficiency ratio due to the pursuit of the low temperature effect of the air conditioning outlet, but also avoids ignoring the low temperature effect due to the one-sided pursuit of the cooling efficiency ratio.

It is better to use a heat pipe for heating pipes, because the heat pipes are not rusty and more durable, and people used to use cold pipes, but now they know their performance with heat pipes, and they don't need to be cold.

1. What is the difference between cold plating tube and hot plating tube?

There are two main types of galvanized pipes, one is hot-dip galvanized pipes, the other is cold-dip galvanized pipes, both of which belong to galvanized pipes, but the main principles are different, so there are certain differences, the difference between cold-dip galvanized pipes and hot-dip galvanized pipes is mainly reflected in the following aspects:

1. The difference in production principles.

Hot-dip galvanizing is a method of immersing the workpiece in the melted zinc liquid for a certain period of time after degreasing, pickling, dipping and drying, and then using the reaction between the iron matrix and the molten metal to generate a galvanized layer. Cold galvanizing, also known as electrogalvanizing, is based on the principle of using electrolysis equipment to put the workpiece into a solution composed of zinc salts after degreasing and pickling, and connecting the negative electrode of the electrolysis equipment, placing a zinc plate on the opposite side of the workpiece and connecting it to the positive electrode of the electrolysis equipment, turning on the power supply, and using the current to move from the positive electrode to the negative electrode, a layer of zinc will be deposited on the workpiece.

2. Differences in performance characteristics.

1) Cold galvanized pipe: The galvanized layer of cold galvanized pipe is thick, the crystallization is fine, uniform and porous, so the corrosion resistance is good; In addition, the zinc layer obtained by cold plating is purer and corrodes slowly in acid, alkali and other fogs, which can effectively protect the steel matrix. Another feature of cold galvanizing is that the zinc coating is passivated by chromic acid to form white, color, army green, etc., which is beautiful and generous, and has a certain degree of decoration.

2) Hot-dip galvanized pipe: hot-dip galvanized steel pipe has a thicker dense pure zinc layer covering the steel surface, which can avoid the contact between the steel matrix and any corrosion solution, protect the steel matrix from corrosion, and the anti-corrosion effect is more ideal; Due to the firm bonding, zinc-iron is miscible with zinc, and the hot-dip galvanized pipe has strong wear resistance; Because zinc has good ductility and its alloy layer is firmly attached to the steel base, hot-plated parts can be formed by cold punching, rolling, wire drawing, bending and other forms without damaging the coating; After hot-dip galvanizing of steel structural parts, it is equivalent to an annealing treatment, which can effectively improve the mechanical properties of the steel matrix, eliminate the stress of steel forming and welding, and is conducive to the turning of steel structural parts.

Whether to use a heat pipe or a cooling pipe for the heating pipe, the heat pipe must be used for heating.

The trachea has heat, and the tube is still a cold-plated tube, so a hot-plated tube should be used, because the heat tube is insulated.

The heating pipe is good with hot-dip pipe, which is not easy to rust and durable.

The heating pipe must be good for hot zinc, and the hot zinc is uniform and transparent, and the anti-embroidery effect is of course good.

Hot. In and out are the same, in order to be hot radiators. How to distinguish between water supply and return pipes in household heating pipes:

1. Touch the temperature If the radiator is already in use, you can try to touch the temperature of the two pipes, the hotter one is the water inlet pipe, and the one that is not hot is the return pipe.

1. The hot pipe is immersed in the molten metal liquid to form a metal coating on the surface, and the inner and outer pipe walls are galvanized, while the cold pipe is electrolyzed to form a uniform, dense and well-bonded metal or alloy early deposition layer on the surface of the pipe, which is only galvanized on the outer pipe wall.

2. Process refers to the method and process of workers using various production tools to process or treat various raw materials and semi-finished products, and finally make them into finished products. As far as a product is concerned, the process is not unique, and there is no good or bad one. This uncertainty and non-uniqueness are quite different from other elements of modern industry.

Summary. There are many ways to distinguish between cold and heat tubes. First of all, it can be identified by the color signs, there is a red sign on the hot water pipe, and a blue sign on the cold water pipe.

There are many ways to distinguish between cold and heat tubes. First of all, it can be identified by the color signs, the hot water pipe has a red sign for quick dismantling, and the cold water pipe in the town has a blue sign.

Secondly, it can be distinguished by the thickness of the pipe wall, the pipe wall of the hot water pipe is thicker than the cold water pipe of the same specification pipe, and the working time of the hot water pipe is longer.

In addition, from the point of view, the hot water pipe is relatively expensive, while the cold water pipe is relatively cheaper.

The pressure of the hot water pipe is greater than that of the cold water pipe, and the pressure of the PPR cold water pipe is and, while the pressure of the wide Sakura hot water pipe is and. The cold water pipe can withstand 16 kg, and the hot water pipe can withstand 20 kg.

1. The difference in performance: if the same specification and the thickness of the pipe wall are the same, the memory water of the general cold water pipe is lower than the freezing point, and it can be thawed naturally under the cold condition, but it cannot be beaten or baked. Therefore, in order to avoid cracking and rupture of water pipes, under normal circumstances, the water pipes should be avoided as much as possible, so as not to travel to hail and affect the service life of water pipes.

2. The difference between the use environment: the hot water pipe made of PP-R material has better stability and mechanical properties under high-grade temperature conditions, but it will be brittle and easy to damage under low temperature conditions. The cold water pipe made of PP-B material has very good toughness under low temperature conditions.

3. The difference between the two types of water pipes: because the pressure requirements of hot water pipes and cold water pipes are different when they are used, the wall thickness of the two water pipes is also different; Again, because the wall thickness of the two types of water pipes is different, there is also a difference. The wall of the hot water pipe is thicker than that of the cold water pipe, so it is relatively higher.

4. The difference in force strength: the hot water pipe can be smashed with a hammer until it cracks, but the cold water pipe may only turn white due to the force, at most it will be flattened and will not crack. Of course, this does not include the fact that some businesses mix a lot of limestone powder in the production process in order to reduce costs, which leads to the reduction of the strength of the water pipes.

5. The difference between materials: the use environment and temperature of hot water pipes and cold water pipes are very different, so the production materials of these two kinds of water pipes are also different. The production materials used in the manufacture of hot water pipes must be copolymerized PP-R, while the production materials used in the manufacture of cold water pipes are mostly homopolymerized PP-B.