How do I know if the quality of the electric heating tube I bought is good?

There is a psychology when buying things. I don’t know if the quality I bought is good or not.

The same is true when buying a heating tube. The electric heating tube is a metal shell from the surface, so it is impossible to tell the quality of it from the surface. The quality can be judged according to the power design, because the power design of the electric heating tube is different for different use environments, and it is normally measured by the power per meter (that is, how much power can be achieved by a one-meter-long heating zone).

1. The water heating power is between 1-3kw/m;

2. The power of oil heating is between 1-2kw/m;

3. The power of air heating is between 1-1.5KW/m. Beyond this range, the greater the power, the shorter the service life.

The material selection of the electric heating tube in different heating environments is different:

1. Liquid heating

1. Stainless steel 304 for water heating;

2. Carbon steel or stainless steel 304 for oil heating;

3. Stainless steel 316 for weak acid and weak alkali;

4. Strong acid and strong alkali are coated with Teflon.

Air heating, choose different materials according to different temperatures

1. Use stainless steel 304 for working temperature below 300 degrees;

2. Use stainless steel 321 when the working temperature is within 500 degrees;

3. Use stainless steel 310S for working temperature within 800 degrees.