Insulating properties of ultra-thin fireproof coatings for steel structure under various heating conditions

doi:10.16265/j.cnki.issn1003-3033.2024.09.0647

Abstract

Abstract:

To achieve the accurate evaluation of steel structure fire resistance in the converter station, based on the possible standard, power and hydrocarbon fire scenarios, the thermal insulation mechanism of ultra-thin fireproof coating as well as its thermal insulation performance on steel members with different steel materials and different cross-section shape factors were investigated through micro-scale thermogravimetric-Fourier transform infrared (TG-FTIR) spectroscopy experiments and small-scale fire test furnace heat insulation experiments. The experimental results show that the faster the fire heating rate, the higher the peak mass loss rate and the higher the peak temperature of the fireproof coating. Different fire heating curves have no effect on the type of gases escaping from the thermal decomposition of fireproof coatings, but have an effect on the amount and peak temperature of escaping gases. Compared with the power and hydrocarbon fire, in the condition of standard fire, more gases are produced before 750 ℃, resulting in better expansion and heat insulation. Furthermore, the fire resistance of the ultra-thin fireproof coatings on the carbon steel and stainless steel at various cross-section shape factors at power and hydrocarbon fire is worse than that of standard fire, indicating poor heat insulation abilities.

Key words: various heating conditions, ultra-thin fireproof coating for steel structure, heat insulation performance, standard fire, hydrocarbon fire, steel components

CLC Number:

X932爆炸安全与防火、防爆

ZHANG Jiaqing, HUANG Yubiao, JIANG Gonghua, HE Lingxin, DING Yanming. Insulating properties of ultra-thin fireproof coatings for steel structure under various heating conditions[J]. China Safety Science Journal, 2024, 34(9): 114-120.

Figures/Tables 9

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