Test method for stainless steel electric heating tubes

1. The resistance test, cold withstand voltage test and cold insulation test are used for inspection.

2. Power test, thermal insulation test, thermal withstand voltage test and leakage current test.

3. Moisture test, salt spray test, life test and other mechanical tests.

First wipe the surface of the heating tube, connect the AC 220V power supply, and then dry burn in the air. When you see that the surface is red, cut off the power immediately, and wipe it clean after the electric heating tube is cooled. There is no black oxide powder on the white paper