DETERMINATION OF HEAT TRANSMISSION BY CONTACT THROUGH PROTECTIVE CLOTHING OR ITS CONSTITUENT MATERIALS.
PART 1: CONTACT THERMAL TRANSMISSION PRODUCED BY A HOT CYLINDER
Protective clothing designed to protect against heat and flame may come into contact with hot surfaces and substances.
Allows evaluation of the heat transferred when a hot cylinder of garments come into contact.
The test method described in this part of ISO 12127 makes it possible to evaluate this heat transfer when a hot steel cylinder, simulating a small hot particle, comes into contact with the material. In addition, this method allows to evaluate the carbonization and the formation of holes in the material.
This part of ISO 12127 describes the test method that allows to evaluate the heat transfer, and the behavior of the materials used in the protective clothing. The application of this part of the standard is limited to contact temperatures between 100ºC and 500ºC.
The cylinder is heated to the contact temperature that is maintained at that value and the sample is placed on top of the calorimeter or the sample is raised to the position of the cylinder. The operation is carried out at constant speed. The threshold time is determined by monitoring the temperature of the calorimeter.
Place the test sample on the calorimeter with its outer face up. Next, remove the protective screen located between the hot cylinder and the calorimeter and move the hot cylinder towards the calorimeter at a speed of (5±0.2) mm/s. Measure and record the temperature of the calorimeter during the test. Perform at least three measurements for each temperature.
This test standard does not have requirements but they can be taken into account according to the requirements according to EN ISO 11612:2015.
We must determine the threshold time, tt to the nearest 0.1 s.
| COMPLIANCE LEVEL |
THRESHOLD TIME (s) |
|
F1 |
Minimum Maximum 5.00 < 10.0
|
| F2 |
Minimum Maximum 10.0 < 15.0
|
|
F3 |
15
|
