What are the steps of feasibility analysis for electric heating tube product design?
 
 　　In the design process, the first step is to conduct a feasibility analysis of the product. The content and steps involved in the product feasibility analysis are:
1. Review and estimation of main technical indicators: The main technical indicators referred to here include the parameter overview of the working environment of the component, and the calculation of the main design parameter values of the component, such as: effective heating area calculation, surface load of the effective heating area, estimation of the tube surface working temperature. Based on the above content, conventional experience can be used to judge whether the product design is feasible.
2. Feasibility analysis of main processes and materials: Whether the coordination between the process characteristics and material characteristics involved in the production of the predetermined reference design product meets the conditions, for example: Does the tube shape design requirement for R satisfy the material properties? Or, when the process involves surface treatment, can the tube material withstand the various physicochemical reactions during the treatment process? Determining these factors is the preparatory work before the detailed design steps.
3. Preliminary review of product appearance design: There should be a comprehensive review process for the product's appearance structure to be calculated.
① Check whether it meets the requirements of various assembly conditions;
② Consider whether it conflicts with safety regulations;
③ Fully review whether the appearance structure meets customer requirements;
④ Consider whether there is any content that needs improvement in the product.
1. Before ordering heating tubes, first clarify whether the electric heating tube is used for dry burning or water burning, to avoid excessive heat load per unit area exceeding the allowable heating temperature and damaging the electric heating tube. In addition, the wiring lead-out part should be exposed outside the heater's insulation layer or the heater itself, so that this part does not overheat and get damaged;
2. The input power supply voltage should not exceed 10% of the rated voltage marked on various electric heating tubes, otherwise it may cause accidents. At the same time, the input voltage should not be lower than the rated voltage, otherwise the heat generated by the electric heating tube will decrease accordingly;
3. Electric heating tube terminals should be kept clean and dry, otherwise the insulation performance will be reduced and short-circuit breakdown may occur. If used in environments with chemical corrosion, flammable, explosive liquids or gases, the wiring part of the electric heating tube should be protected with an insulation sealing device to prevent accidents;
4. When heating certain adhesives or substances such as sodium nitrate, stearic acid, paraffin, etc., the power supply voltage should be reduced at the beginning to lower the heating capacity of the single-end stainless steel electric heating tube. After all is melted into liquid, raise to the rated voltage for heating;
5. When selecting electric heating tubes, special attention should be paid to the heating medium to avoid medium corrosion of the tube shell material;
6. After the electric heating tube has been used for a period of time, if thick scale or oil deposits accumulate on the surface, they should be removed regularly; otherwise, the heat transfer performance of the electric heating tube will decrease, causing the tube surface heat load to exceed the rated allowance and become damaged;
7. Electric heating tubes should be stored in a dry warehouse. If the surface becomes damp due to long-term storage, measure the insulation resistance with a megohmmeter before use. If it is less than 1 megohm/500 volts, place the electric heating tube in a 200-degree drying oven for drying.