Study on the influence of aging time and temperature and humidity on cable combustion characteristics

Qishen Lv; Zhiren Tian; Chengwei Zhang; Weili Zhao; Bo Gong; Jinqiang He

doi:10.54097/sm8j9q60

Authors

Qishen Lv
Zhiren Tian
Chengwei Zhang
Weili Zhao
Bo Gong
Jinqiang He

DOI:

https://doi.org/10.54097/sm8j9q60

Keywords:

Aging cable; thermal aging; damp heat aging; taper calorimeter.

Abstract

To investigate the effects of temperature and humidity on PVC cable combustion during thermal aging and its temporal variations. Three conditions: 85℃/90℃ thermal aging, 85℃/85% humidity damp-heat aging. Tested combustion characteristics with cone calorimeter, analyzed ignition time, heat release rate, fire performance index, smoke production rate, and CO/CO₂ volume fraction. Results: 85℃ aging and damp-heat aging increased ignition time from 17s to 27s, 90℃ aging had little effect, stable at 25s. During combustion, cable material changed from hot thick to hot thin, heat release rate decreased with aging days, peaking three times. 85℃ aging reduced heat release rate to 130 KW/m², 90℃ and damp-heat aging delayed to 160 KW/m² and 140 KW/m² respectively. Fire risk was higher for 6 and 5 days aging compared to 85℃. Aging days reduced flue gas, but high temperature and humidity increased production.

Downloads

Download data is not yet available.

References

[1] Shu Zhongjun, Jia Wenna, Chen Nan. Effect of thermal aging on the combustion performance of flame-retardant PVC cables [J]. Fire Protection Science and Technology, 2010,29 (02): 142-144 + 149.

[2] Zhang Zheng, He Yuanhua, Wu Yi, et al. Study on the combustion performance of aviation cables under different thermal radiation conditions [J]. Fire Protection Science and Technology, 2019,38 (09): 1207-1210.

[3] Chen Shanqiu, Zhao Wenjun Yun, Yan Long, et al. Fire hazard analysis of ultra-heat refractory cable based on CONE [J]. Fire Protection Science and Technology, 2022,41 (02): 156-160.

[4] Yan Long, Wang Wenqiang, Xu Zhisheng, et al. Effect of thermal aging on the combustion performance and pyrolysis kinetics of flame retardant cable sheath layer [J]. China Safety Production Science and Technology, 2023,19 (09): 143-149.

[5] He Jinlong. Experimental study on low-temperature heating of PVC insulating materials [D]. China University of Geosciences (Beijing), 2016.

[6] Javanna. Study on the influence of thermal aging on heat resistance and combustion performance of plastic cables [D]. The Chinese People's Armed Police Force Academy, 2009.

[7] Xu Jun, Wang Xiaodong, Ouyang Benhong, et al. Effect of thermal aging on the physical and chemical structure of crosslinked polyethylene cables [J]. Insulation material, 2013,46 (02): 33-37.