Electric heating tubes are affected by the length of the alloy wire during production, which influences the resistance of the alloy wire and consequently the power of the electric heating tube. Power errors exist, but according to the standard "JB/T 2379-93 Industrial Electric Heating Tube Standard," the deviation range for rated power is as follows:
Under full heating conditions, the deviation of the rated power of electric heating tubes should not exceed the following specified ranges:
1. For electric heating tubes with rated power less than or equal to 100W: ±10%;
2. For electric heating tubes with rated power greater than 100W: +5%~-10% or 10W, whichever is greater.
