Measure the connectors at both ends of the heating pipe with a small resistance gear. The resistance value should be below Zhi hundreds of ohms. The resistance of the electric heating pipe with high power will be lower and the energy will be connected, but the resistance value is large, and the electric heating pipe may have been burned out.

        Use the high resistance gear of the electricity meter to measure the resistance between the wiring pile head and the shell of the heating pipe. The resistance value should be infinite. If the resistance value is only tens of thousands of ohms, the insulation of the heating pipe has been broken down, and there will be a risk of leakage during use. It is best not to use such heating pipe again.

        The material selection of different heating environments is also different, including stainless steel 304 for normal water heating, stainless steel 316L for weak acid and weak alkali liquid, and Teflon coating for strong acid and strong alkali.