1. Description
Customers report that the medium and low temperature modified MgO powder produced by our factory has better performance when made into Bondy tubes, but the electric heating tubes made of aluminum tubes are not waterproof, and the insulation decreases after immersion, and the product is poor, which affects normal production. Please inform us promptly Countermeasures and treatment methods.
2. Further inspection of physical objects
product name
Empty aluminum tube size
Aluminum product size
Compression ratio%
Red ink test results
Big pipe
Φ9.53×1
Φ8.04~8.18
14.90
Water ingress
Middle tube
Φ9.53×1
Φ7.92~8.0
16.40
No water
small tube
Φ9.53×1
Φ8.44~8.50
11.11
Imported and national powder are in water
New product
Φ8×0.8
Φ6.6
17.50
No water
New product
Φ×0.8
Φ6.7
16.25
Water ingress
Analyze from the perspective of fans
Normal insulation
Normal withstand voltage
620℃, insulation after 15 minutes
Red ink test results
≤1000MΩ
≤2000v
≤100kMΩ
Water ingress
>1000MΩ
>2000v
>100kMΩ
No water
3. Countermeasures
The compression ratio is greater than 16.4%, and the insulation performance of the electric heating tube is normal.