How to test the insulation effect of stainless steel kettles

How to test the insulation effect of stainless steel kettles
Stainless steel kettles are widely popular for their durability and insulation performance. In order to ensure that the insulation effect of stainless steel kettles meets the standards, a series of tests are required. The following is a comprehensive analysis of the insulation effect test of stainless steel kettles.

1. Test standards and methods
1.1 National standards
According to the national standard GB/T 8174-2008 “Testing and evaluation of insulation effect of equipment and pipelines”, testing the insulation effect of stainless steel kettles needs to follow certain test methods and evaluation standards.

1.2 Test method
The methods for testing the insulation effect of stainless steel kettles mainly include the following:

1.2.1 Thermal balance method
The method of obtaining the heat dissipation loss value by measuring and calculating is a basic method suitable for testing the heat dissipation loss of the surface of the insulation structure

1.2.2 Heat flux meter method
The heat resistance heat flux meter is used, and its sensor is buried in the insulation structure or applied to the outer surface of the insulation structure to directly measure the heat dissipation loss value

1.2.3 Surface temperature method
According to the measured surface temperature, ambient temperature, wind speed, surface thermal emissivity and insulation structure dimensions and other parameter values, the method of calculating the heat dissipation loss value according to heat transfer theory

1.2.4 Temperature difference method
The method of calculating the heat dissipation loss value according to heat transfer theory by testing the inner and outer surface temperature of the insulation structure, the thickness of the insulation structure and the heat transfer performance of the insulation structure at the use temperature

2. Test steps
2.1 Preparation stage
Before testing, it is necessary to ensure that the kettle is clean and intact, without obvious scratches, burrs, pores, cracks and other defects

2.2 Filling and heating
Fill the kettle with water above 96℃. When the actual measured water temperature in the body of the insulated kettle reaches (95±1)℃, close the original cover (plug)

2.3 Insulation test
Place the kettle filled with hot water at the specified test environment temperature. After 6 hours±5 minutes, measure the temperature of the water in the body of the insulated kettle

2.4 Data recording
Record the temperature changes during the test to evaluate the insulation effect.

3. Test tools
The tools required to test the insulation effect of stainless steel kettles include:

Thermometer: used to measure water temperature and ambient temperature.

Heat flow meter: used to measure heat loss.

Insulation performance tester: used to measure and evaluate insulation effect.

Infrared radiation thermometer: used to non-contact measure the outer surface temperature of the insulation structure

4. Test result evaluation
According to national standards, the insulation performance level of insulated kettles is divided into five levels, with level I being the highest and level V being the lowest. After the test, the insulation performance level of the insulated kettle is evaluated according to the temperature drop of the water in the kettle

5. Other related tests
In addition to the insulation effect test, stainless steel kettles also need to undergo other related tests, such as:

Appearance inspection: Check whether the surface of the kettle is clean and scratch-free

Material inspection: Ensure that stainless steel materials that meet food safety standards are used
Volume deviation inspection: Check whether the actual volume of the kettle meets the volume requirements of the label
Stability inspection: Check whether the kettle is stable on an inclined plane
Impact resistance inspection: Check whether the kettle has cracks and damage after being impacted

Conclusion
By following the above test methods and steps, the insulation effect of stainless steel kettles can be effectively tested and ensured to meet national standards and consumer needs. These tests not only help improve product quality, but also enhance consumer trust in the product.