1. The most commonly used material is stainless steel 304: the working environment is generally divided into dry burning and liquid heating. If it is dry burning, such as for ovens and duct heaters, carbon steel or stainless steel can be used. 304 material.
If it is heating liquid, if it is water, use stainless steel electric heating tube. This stainless steel is generally made of stainless steel 304. If it is oil, carbon steel or stainless steel 304 can be used. If it contains weak acid and alkali liquid, it can use stainless steel 316 material. If there is only strong acid in the liquid, stainless steel 316, PTFE or even titanium tube should be used.
2. Determine the power of the heating tube according to the working environment: The power setting is mainly for dry heating electric heating tubes and liquid heating. For dry heating, generally a one-meter-long tube is 1KW, and the heating liquid is generally a one-meter-long tube. Do 2-3KW, the largest is not more than 4KW.
3. The shape of the heating tube is selected according to the customer's electric heating equipment: the shape of the stainless steel heating tube is ever-changing, the simplest is straight rod, U-shaped and then special-shaped. The specific situation adopts the electric heating tube of the specific shape.
4. Determine the wall thickness of the heating tube according to the use of the customer's heating tube: generally, the wall thickness of the heating tube is 0.8mm, but according to the working environment of the heating tube, such as when the water pressure is high, it is necessary to use the wall thickness. Thicker seamless stainless steel tubes are used to make electric heating tubes.
5. When purchasing, ask the manufacturer clearly, the internal material of the heating tube: why are many heating tubes similar in appearance, but there is a big error in the price? That is the internal material inside. The two most important materials inside are insulating powder and alloy wire. Insulation powder, the poor will use quartz sand, the good will use insulation modified magnesium oxide powder. In addition, the alloy wire, generally iron-chromium-aluminum, can be made of nickel-chromium alloy wire according to the requirements and grades of pipe production.
