How to distinguish the advantages and disadvantages of electric cartridge rod heaters
The first is that the quality of stainless steel is the key to the difference in the moisture content of nickel. Nickel is a high-quality anti-corrosion element. In stainless steel plates, it is extremely compatible with chromium to deepen the corrosion resistance and corrosion resistance. For carbon-environment-friendly nickel steel to obtain a pure martensitic structure, the nickel content must exceed 28%, and the corrosion resistance of the steel in some media must be significantly changed only when the nickel content is 21%. Therefore, for the heating pipe, for more advanced distribution of corrosion resistance and heat resistance, 700, 840, 317L and other materials can be selected. 700 stainless steel pipe contains more than 40% nickel, 840 pipe contains more than 30% nickel, and 317L stainless steel pipe contains nickel. The amount of water is 12%, but if some 316 pipe stainless steel plates are selected, the nickel content can only be 8%.
Advantages of stainless steel cartridge rod heaters: good temperature resistance, heat resistance, corrosion resistance, cost is equal to a relatively low cost performance, at this stage there are many types of stainless steel cartridge rod heaters, the price of various materials varies widely, the same is stainless steel plate, The quality characteristics are also quite different.
Therefore, the purchase of stainless steel pipes for cartridge rod heaters must be inspected for the moisture content of its main elements to avoid counterfeiting and inferior products, and to buy low-quality goods at sky-high prices.
Other universal identification methods:
In addition to this visualization, people have the following ways to test its pros and cons.
1. Carry out compressive strength testing of electrical equipment
Under the compressive strength of cold electrical equipment and the compressive strength of electrical equipment at operating temperature, high-quality goods should be able to withstand a breakdown voltage of 60Hz for 1 minute. After the current is turned off for 5ma, there is no problem of thermal breakdown or flashover.
2. Carry out load test
Under the standard of sufficient exothermic reaction, there is 1.6 hours of electricity at 1.27 times the maximum power. Turn off the power to cool the water and repeat this hot spot 40 times. Take a look at the heating pipe to see if there is any damage.
3. Carry out leakage current test
Put the cartridge rod heaters under sufficient heating standard and carry out electricity with 1.15 times the working voltage. If the leakage current is lower than 0.6YA, it means high-quality electric cartridge rod heaters.
4. Carry out tightness testing
This leak tightness test is mainly used for the heater's cabinet. The heating tube is placed in alkaline water, and then both sides of the cartridge rod heaters are exposed. Look at the characteristics that the wood has more than items 1, 2 and 3. Provisions.
5. Carry out testing of hermetic seals
The key characteristics are the same as the fourth one, only the test standard is different. The standard of this test is to put the electric cartridge rod heaters in a natural environment with a temperature of 65 degrees Celsius and an ambient humidity of 96% every day.
The key to the quality of electric cartridge rod heaters lies in the following aspects: compressive strength of electrical equipment, insulation layer, insulation resistance, accuracy of output power, service life, corrosion resistance, specifications, etc.
1. Compressive strength of electrical equipment: The factors that endanger the compressive strength of heating equipment include the thickness of the cable jacket, the quality of the raw materials of the cable jacket, the length of the cartridge rod heaters, the bending length, and the number of bends.
2. Insulation layer: The key to endanger the insulation layer of the cartridge rod heaters is the sealing process of the cartridge rod heaters. SUWAIE can usually guarantee around 1500 Megohms.
3. Leakage current: The key is related to the temperature when the heating tube is applied, the working voltage of the cartridge rod heaters, and the length of the heating tube. It is a key assessment content for high temperature cartridge rod heaters.
11. Output power accuracy: The key is related to the quality of the resistance line and the technical level of the production plant. Hongchuang must conduct temperature index experiments before mass production to confirm cold-state resistors in the output power range.
4. Service life: In addition to the quality of the resistance wire, the service life of the cartridge rod heaters is also related to the quality of the magnesium oxide powder and the selection of the resistance wire diameter. When selecting the diameter of the resistance wire, the surface load of the resistance wire needs to be calculated to exceed the service life requirement.
6. Corrosion resistance is a problem often encountered in water heating cartridge rod heaters and skewer heating tubes. In addition to the effective selection of raw materials, it is also related to the quenching and tempering treatment of the heating tube and the surface condition of the cartridge rod heaters.