To test the fluidity of dry powder extinguishing agent, follow the following steps:
1. Prepare instruments
Flow meter: consists of a glass sand clock and a reversible stand.
Balance: Sensitivity 0.5g, used for accurately weighing dry powder fire extinguishing agent sample.
Stopwatch: Index value 0.1s, used to record the time.
2. Test procedure
Weigh the sample: Weigh the dry powder fire extinguishing agent sample 300g, accurate to 0.5g, and put it in the glass sand clock.
Installation and aeration: The glass sand bell is installed on the support, and then the sample is continuously turned over for 30s in the sand bell to aerate the sample.
Start measuring: Immediately start measuring the time of 20 consecutive free passes through the middle neck opening.
3. Record results
The arithmetic mean value of 20 test times was taken as the measurement result. This average represents the fluidity of the dry powder extinguishing agent.
4. Precautions
Throughout the testing process, ensure the accuracy and stability of the instrument.
The weighing should be accurate to 0.5g to ensure the accuracy of the test results.
The index value of the stopwatch should reach 0.1s to accurately record the time.
Through the above steps, the fluidity of dry powder fire extinguishing agent can be accurately and effectively detected, which provides an important basis for the quality control and performance evaluation of dry powder fire extinguishing agent.
