1. How to distinguish the quality of stainless steel tubular heater:
The quality of stainless steel depends mainly on the difference in nickel content. Nickel is a high-quality corrosion-resistant element. The perfect combination with chromium in stainless steel further strengthens the corrosion resistance and acid and alkali resistance, but the low-carbon nickel steel needs to obtain pure austenite. The body composition, the nickel content should reach 24%, and only the copper content of 27% can make the corrosion resistance of steel in some media change significantly. Therefore, for the heating pipe, the corrosion resistance and high temperature resistance can be selected as 800, 840, 316L, etc., 800 stainless steel tube contains 30% nickel, 840 tube nickel content reaches 20%, 316L stainless steel tube nickel content 10%, but if it is used in a poor 304 tube stainless steel containing only 8% nickel.
2, stainless steel Dryer Tubular Heater Element advantages: good heat resistance, dry burning, the cost is relatively low, the current stainless steel heating tube type is more, the price difference of various materials is large, the same stainless steel material, its quality performance is also very different Big.
Therefore, the purchase of stainless steel pipes for Dryer Tubular Heater Elementneeds to be tested for the specific element content, so as to prevent shoddy filling and low-quality products at high prices.
Other common authentication methods:
In addition to this intuitive method, we have the following methods to check its quality.
1. Conduct electrical strength test
In the cold electrical strength and the electrical strength of the working temperature, the quality product should be able to withstand 50hz, one minute of withstand voltage. After the current is cut off by 5 ma, there is no breakdown or flashover.
2, carry out overload experiments
Under the condition of sufficient exotherm, the current was energized at 1.27 times of the rated power for 1.5 hours, the electricity was cooled and the hype was repeated 30 times to see if the heating tube of the eucalyptus wood was damaged.
3, conduct leakage current experiment
Place the Deep Fryer Electric Heating Element under sufficient heating conditions and energize it at a voltage of 1.15 times. If the leakage current is less than 0.5MA, it is a good quality electric heating tube.
4, carry out sealing test
This sealing test is mainly carried out on the outer casing of the Deep Fryer Electric Heating Element. The Deep Fryer Electric Heating Element is placed in acidified water, and then the two ends of the electric heating tube are exposed to see if the performance requirements have met the requirements of the first and third.
5, carry out sealing seal test
The main performance requirements are the same as the fourth one, except that the experimental conditions are different. The condition of this experiment is to place the electric heating tube in an environment with a temperature of 60 degrees Celsius and a humidity of 95% for one day.