Electric heater manufacturer's popular science: Why do electric heating tubes burst?

Tubular electric heating element (referred to as electric heating tube) is an electrical element that converts electrical energy into thermal energy. It uses a metal tube as the outer shell (including stainless steel and copper tube), evenly distributes spiral electric heating alloy wires (nickel-chromium and iron-chromium alloys) along the central axis of the tube, and fills and compacts its gaps with magnesium oxide with good insulation and thermal conductivity. Both ends of the nozzle are sealed with silicone. This metal armored electric heating element can heat air, metal molds and various liquids. Common electric heating tubes include finned electric heating tubes, Teflon electric heating tubes, quartz electric heating tubes, etc., which are widely used in various heating occasions due to their low price, easy use, easy installation and no pollution.

So, if the electric heating tube bursts, what factors will cause it? Let the electric heater manufacturer come to popularize science for everyone!

1. What is a burst tube?

During use, local cracking in the heating area of the tube body is usually called a burst tube. This phenomenon is caused by a variety of reasons, which may be product design and quality problems, or improper use and maintenance by customers.

2. Why does the tube burst?

A. From the pipeline itself

(1) The quality of pipeline welding is defective;

(2) The surface load exceeds the standard, the power per meter is designed too large, and the internal temperature of the heating pipeline manufacturer is too high, causing expansion, which is easy to cause pipeline explosion;

(3) The drying of magnesium oxide does not meet the process requirements, the filling is not tight enough or the sealing is poor, the magnesium oxide powder absorbs moisture, there is too much internal moisture, and the gas expands when heated, causing heat accumulation and pipeline explosion;

(4) The wall thickness of the heating pipe is too thin. The wall thickness of the pipe used in the batch production line will not be too thick. It is mainly for civil use, and industrial pipelines are non-standard customization.

B. In terms of customer use

(1) Customers cross-use electric heating tubes and directly use electric heating elements originally designed for mold heating for air dry combustion; or use electric heating elements for liquid heating, which causes air dry combustion, which can cause pipe explosion;

(2) External impact or accidental impact during use;

(3) When the heating medium is water or heat transfer oil, due to the large amount of impurities in the medium, scaling or carbon deposition is very fast, and the customer does not clean the pipe surface for a long time, the pollutants on the pipe surface become thicker and thicker, resulting in the surface temperature of the electric heating pipe cannot be discharged in time, heat accumulation and internal temperature are too high, resulting in cracking and pipe bursting;

(4) The electric heating tube has no temperature control, so that it works at the limit allowable temperature for a long time;

(5) The container is under pressure, but the pipe is a welded pipe.

For this reason, if the electric heating tube bursts, the electric heater manufacturer recommends that you pay more attention to the use method and do more maintenance. If you have other questions about electric heaters, please contact our customer service!