Is there any relationship between the surface load of the electric heating tube and its service life?

The surface load of the electric heating tube has a direct relationship with the life of the electric heating tube. Different surface loads should be adopted when designing electric heating elements in different use environments and different heating media. Applications Electric heating tube materials and surface loads (power density) Watts/square centimeter Application examples 10-20# Stainless steel Copper tube Aluminum tube Still air heating Not applicable Shower, water heater, etc. Soft water Not applicable Not applicable High-end kitchen water, etc. Tubular electric heating element principle Tubular heating element is a heating element in which a resistance wire is placed in a metal tube, and the surrounding gap is tightly filled with crystalline magnesium oxide powder with good heat resistance, thermal conductivity and insulation, and then processed by other processes. How long is the service life of the electric heating tube? Possible problems with electric heating tubes It has the characteristics of simple structure, high mechanical strength, high thermal efficiency, safety and reliability, easy installation, and long service life.

1. Widely used in various saltpeter tanks, water tanks, acid and alkali tanks, air heating furnace drying ovens, hot molds and other devices. Fault phenomenon: burnt fuse Fuse diameter is too small, capacity is insufficient; power cord plug and electric heating socket are short-circuited; lead or lead of electric heating tube falls off and causes short circuit; electric heating tube (core) burns and causes short Main technical indicators: Power parameters: power at rated voltage is +5%-10% Leakage current: leakage current at working temperature <0.5mA Electrical strength: electrical strength at working temperature withstands test voltage >1000V, 50Hz, 1MIN, and there should be no flashover breakdown: Insulation resistance: cold insulation resistance ≥100MQ (megaohm) Appearance: no significant mechanical scars or local expansion, no wrinkles, bumps and other phenomena at the bend.

2. Mainly used for non-standard flange electric heaters for heating in open and closed solution tanks and circulation systems. 5 major features of the product: small size and high heating power; large surface power, which is 2 to 4 times the surface load of air heating. It can heat various media in various occasions, such as explosion-proof occasions; highly intensive and compact structure. Because the whole is short and dense, it has good stability and no bracket is required for installation. Imported and domestic high-quality materials, scientific production processes, and strict quality management are selected to ensure the superior electrical performance of the electric heating tube.

3. The heating temperature can generally reach 720℃. The heating system can be fully automatically controlled, including controlling the electric heating system through the DCS system; It has a long service life and multiple protection systems, which are safe and reliable. Most of the combined types use argon arc welding to connect the electric heating tube to the flange. They can also use the form of fastening devices, that is, each electric heating tube is welded with fasteners, and then locked with nuts with flange covers. The tubes and fasteners are welded with argon arc welding, and never leak. The fasteners are sealed with scientific processes, and single replacement is extremely convenient, which greatly saves future maintenance costs. The electrical performance is stable and the thermal efficiency is high, which saves more than 30% energy than general metal heating elements, and the heating speed is extremely fast.