UL181 Fire Flame Penetration Test Apparatus Lab Testing Machine

 

 

 

 

UL181.

 

 

3.1 At the end of the pre-heat and stabilization period, the calcium silicate board is to be removed andthe air duct test sample substituted in its place within 10 seconds with the sample oriented such that thecore wires are parallel to the bumers. The test sample is to be subiected during the test to a static loadlocated at the geometnic center and rotated to any position determined to be most critical for penetration on the upper surace of that part of the sample exposed to the flame. See Fiqure 10.3. The static load is tobe gently lowered onto the test sample 3 to 5 seconds after the test sample is in place.
3.2 The gas input to the furmace is not to be disturbed during this changeover and any subsequenttest period.
3.3 The test is to be continued for a period of 30 minutes. The test period is to be measured from thetime the static load is applied to the test sample.