1. Excellent heat transfer performance. Due to the use of thin-walled materials with a wall thickness of 0.5-0.8mm, the heat transfer performance is improved. Under the same heat transfer area, it is about 1.2~1.30 times that of copper tubes.

2. Strong corrosion resistance, resistance to pitting corrosion, ammonia corrosion and general corrosion, and the service life can reach more than 20 years.

3. Since the stainless steel material is high-performance alloy steel such as TP304 and TP316L, the surface has high strength, and the inner wall of the pipe is smooth, which makes the thickness of the bottom layer of the boundary laminar flow thinner, so it has strong erosion resistance of high-temperature steam.

4. The rigidity of the pipe is obviously improved, and the anti-vibration performance is good.

5. Strengthen the heat exchange tubes to improve the anti-fouling performance.

6. The performance of the tube loading process is good. The traditional tube expansion process is adopted. The tolerance of the outer diameter is the same as that of the steel tube. There is no need to change the processing tolerance of the tube plate hole, which is convenient for direct selection, especially convenient for the old unit to replace the copper tube with the stainless steel heat exchange tube.

7. The economy is good. Under the same heat transfer area, the cost is currently about 60% of the copper tube, and the stainless steel tube can be directly replaced.

[What are the principles of using stainless steel heat exchange tubes]

With the development of the heat exchange industry, stainless steel heat exchange tubes are widely used. The following editor will introduce the application criteria of stainless steel heat exchange tubes.

There is no serious corrosion and leakage, the service life is as long as possible, it is resistant to erosion and wear, good vibration resistance, high heat transfer coefficient, and reasonable price. For decades, copper tubes have been used in condensers, oil coolers, and water coolers in my country. The specific point is that the thermal conductivity is high.

In practice, some of the copper tubes of the condenser were severely corroded by ammonia, and some copper tubes were severely worn. These two phenomena caused serious leakage of the copper tubes, which greatly shortened the service life of the copper tubes, and the operating time of the unit Safety and economy are reduced, and the downtime for copper pipe replacement is increased. For this reason, many people began to reconsider the issue of condenser pipes. In recent years, 304/316l stainless steel tube heat exchange tubes have been widely used in condensers, oil coolers, and air coolers; on low-pressure heaters, according to incomplete statistics, more than 50% of the units used, including 50 - A new unit of 300MW. The use of stainless steel heat exchange tubes breaks the traditional concept of only using copper tubes, improves the safety and economy of equipment, and reduces investment.

Stainless steel heat exchange tube characteristics and precautions

The stainless steel heating tube heats the fluid by means of forced convection. The material is stainless steel, that is, a pump is used to pump the fluid into the heating chamber at one end of the heater. After heating, it flows out at the other end of the heater. It is a heating method that circulates through the pump forcibly. Compared with the traditional heating method , remarkable energy saving, scientific process, convenient installation and use, and obvious economic benefits.

Features:

1. Small size and high power: The electric heater mainly adopts clustered tubular heating elements inside, and the maximum power of each clustered tubular electric heating element reaches 5000KW.

2. Fast thermal response, high temperature control precision and high comprehensive thermal efficiency.

3. Wide application range and strong adaptability: the circulation heater can be used in explosion-proof or ordinary occasions, its explosion-proof grade can reach B and C, and its pressure resistance can reach 20Mpa. And the cylinder can be installed vertically or horizontally according to the needs of users.

4. High heating temperature: The maximum working temperature of the heater design can reach 850°C, which cannot be obtained by ordinary heat exchangers.

5. Fully automatic control: Through the design of the heater circuit, the automatic control of parameters such as outlet temperature, pressure, and flow can be realized conveniently, and it can be networked with a computer to realize man-machine dialogue.

6. Long life and high reliability: The heater is made of special electric heating materials, and the design power load is reasonable. The heater adopts multiple protections, which greatly increases the safety and life of the heater.

7. The stainless steel heat exchange tube is made of a metal tube as the shell, and the spiral electric heating alloy wire (nickel-chromium, iron-chromium alloy) is evenly distributed along the central axis of the tube, and the gap is filled and compacted with magnesia sand with good insulation and thermal conductivity. The ends are sealed with silicone or ceramic, this metal armored heating element can heat air, metal molds and various liquids. ] The high-temperature electric furnace wire is evenly distributed in the high-temperature-resistant stainless steel seamless pipe, and the crystalline magnesium oxide powder with good thermal conductivity and insulation performance is densely filled in the gap. This structure is not only advanced, but also has high thermal efficiency and uniform heating. When high temperature When there is current passing through the resistance wire, the generated heat diffuses to the surface of the metal tube through the crystalline magnesium oxide powder, and then transfers to the heated part or the air to achieve the purpose of heating.

product advantages:

1. First of all, the stainless steel heating tube is filled with high-temperature magnesium oxide powder for insulation treatment during processing, so the surface insulation is not charged when it is energized and heated, and it is safe to use.

2. Secondly, the electric heating tube has a high degree of mechanization, and can be bent into various shapes according to customer requirements. It is light and easy to disassemble and assemble.

3. The electric heating tube has simple structure, less materials, low cost, long service life, high heat conversion rate, and energy saving.

Precautions:

Induction cooker, electric heater, electric boiler and other electric heating tube products have brought great convenience to our life and work. However, due to the high power of stainless steel heating tubes, some operators may not Improper use of the aspect has also caused many fires.

Based on years of industry research, the following aspects of the finished products of stainless steel heating tubes that are likely to cause fire are summarized:

1. Under long-term baking at high temperature, it will ignite the combustibles placed on the finished product of the stainless steel heating tube or the combustibles nearby;

2. Do not insert the heating wire without a plug into the socket, which will easily cause a short circuit of the wire;

3. If the heating wire is aging and damaged, it should be replaced immediately;

4. When the operator leaves the work site for a long time, if the finished plug of the stainless steel heating tube is not unplugged, the continuous rise in temperature will cause a fire;

5. When encountering a power failure, unplug the plug immediately to prevent unnecessary fire caused by forgetting afterwards;