According to relevant standards, Flange electric heating pipe There are the following:
1 heating time: under the test voltage, the time for the element to rise from the ambient temperature to the test temperature shall not be more than 15min
2. Rated power deviation: under the condition of sufficient heating, the deviation of rated power of components shall not exceed the following specified range; for components with rated power less than or equal to 100W: ± 10%. For components with rated power greater than 100W, + 5% ～ - 10% or 10W, whichever is greater.
3 leakage current: the leakage current in cold state and after water pressure and sealing test shall not exceed 0.5mA, and the hot state leakage current under working temperature shall not exceed the calculated value in the formula, but not more than 5mA, I = 1 / 6 (TT × 0.00001), i-hot state leakage current ma When several components are connected in series to the power supply, the leakage current test should be conducted with this group of components as a whole.
4 insulation resistance: cold insulation resistance shall not be less than 50m Ω during delivery inspection
After sealing test, the insulation resistance after long-term storage or use shall not be less than m Ω
The thermal insulation resistance at working temperature should not be lower than the calculated value in the formula, but also should not be less than 1m Ω
R = "(10-0.015t) / T" × 0.001 R - insulation resistance in hot state m Ω T - heating length mm T - working temperature ℃
5. Insulation and withstand voltage strength: the components shall be kept under the specified test conditions and voltage for 1 min without flashover and breakdown
Ability to withstand power on and off: the components shall be able to withstand 2000 power on and off tests under the specified test conditions without damage
Overload capacity: under the specified test conditions and input power, the component shall withstand 30 cycles of overload test without damage
8 heat resistance: under the specified test conditions and test voltage, the components shall withstand 1000 cycles of heat resistance test without damage