Electrical heater quality appraisal

electric heater is an electric heating device whose main function is to convert electrical energy into heat energy. It is widely used to heat, maintain and heat flowing media. It has the characteristics of small size and high power. The heating methods of electric heaters include resistance heating, induction heating, etc. Among them, resistance heating is the most common method, which uses electric current to release heat through the electric heating body to heat the blank. The electric heater adopts intelligent control mode, has high temperature control accuracy, and can be connected to the computer, making it widely used, long life and high reliability.

electric heater can safely and reliably heat various media, such as temperature-raising heating of chemical materials, powder drying, and process water heating. In addition, electric heaters are also widely used in scientific research and production laboratories such as aerospace, weapons industry, chemical industry and universities, as well as chemical industry, military industry, oil, natural gas, offshore platforms, ships, mining areas and other places that require explosion protection.
In the case of electric heater quality appraisal, Zhongke Testing can provide electric heater quality appraisal services.

1, appearance quality
The appearance of inferior electric heating equipment is usually rough in workmanship and poor in material. For example, the quality of plastic material is not up to standard and is easy to deform, crack, etc. High-quality electric heating equipment has fine appearance, high-quality materials, and longer service life.
2, heating efficiency
The heating efficiency of electric heating equipment is one of its important performance indicators. Inferior electric heating equipment usually has low heating efficiency and takes a long time to reach the ideal heating temperature. High-quality electric heating equipment has high heating efficiency and can quickly reach the set heating temperature.
3, safety performance
The safety performance of electric heating equipment is one of its most important performance indicators. Inferior electric heating equipment often has poor safety performance and has potential safety hazards such as leakage and short circuit. High-quality electric heating equipment has good safety performance and complies with national safety standards, which can ensure the safety of users.

QC/T 1101-2019 Electric heater for electric vehicles
CB/T 4484-2018 Electric heater for marine fuel burners
QB/T 1741-2017 Constant temperature electric heater for electric mosquito coils
NB/T 20393-2016 Technical conditions for pressurized water reactor nuclear power plant regulator electric heater
JB/T 12514-2014 Hot runner electric heater
JB/T 12233-2015 Armored electric heater
CB/T 4347-2013 Marine oil electric heater
JB/T 7836.3-2005 Electric heater for motors Part 3: Explosion-proof finned tube electric heater
JB/T 7836.1-2005 Electric heater for motors Part 1: General technical conditions
JB/T 7836.2-2005 Electric heater for motors Part 2: Ordinary finned tube electric heater
0CB/T 3869-1999 Marine oil and wastewater separation device Technical conditions for tubular electric heater
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An electric heater explosion occurred in a chemical plant. Although the fire was put out in time, it still caused casualties and property losses. Therefore, it was commissioned to identify whether the electric heater had quality problems that caused the explosion.
identification and analysis results:
The identification and analysis expert group discussed the relevant information and on-site investigation of the electric heater involved and conducted a comprehensive quality and technical analysis, and made the following suggestions and conclusions:
The temperature, pressure, current, and input voltage of the heater are all normal and comply with relevant regulations. However, its protective device failed to play its due role.
In addition, composition analysis found that the iron content in the insulation layer of the heating tube was relatively high, resulting in a decrease in insulation ability. Long-term high temperature causes the magnesium oxide in the insulation layer to produce oxygen, which forms a mixed explosive gas with flammable gas, and explodes under the action of high temperature.
In summary, the quality of this electric heater is defective and cannot be used for normal operation.