Thermal protection of multilayer containers against the effect of fires

Abstract

Results are given of experimental and theoretical investigation of the efficiency of using SGK-1 intumescent coating for the protection of multilayer container with annular air gaps against the effect of fire. The procedure and special features of performing full-scale firing tests are considered. A conjugate physicomathematical model is suggested for describing the heating of a multilayer container with fireproof coating of intumescent type. Good agreement is obtained of the prediction and experimental data on unsteady-state heating of internal layers of the container. It is demonstrated that the use of SGK-1 intumescent coating enables one to provide reliable protection of multilayer containers under the effect of fires.

Modeling of the Thermal Protection of a Multilayer Material Under Fire Conditions

“…When heated, the material loses its mass and, supposedly, its irreversible and one-dimensional expansion on the z-coordinate occurs. In [9,11], it was shown that such a process of BFRC destruction corresponds with good accuracy to the real process. However, in the present paper, as opposed to [9,11], the heat propagation by conduction along the transverse coordinate r is taken into account [8].…”

“…On heating of the material the thermal processes in the nondeformable second layer (wood) and in the deformable third layer protected against fi re are considered from the viewpoint of the conjugate mathematical model of nonstationary heat and mass transfer [11]. The bloating fl ame-retardant coating is modeled by a permeable multiphase one-temperature (by virtue of low temperatures T < 1200 K) reacting medium containing the condensed and the gaseous phases.…”

“…In the present paper, on the basis of the models of [11][12][13] the thermal regime of the wood incorporated into a multilayer structure protected against fi re by an SGK-1 bloating fl ame-retardant coating has been investigated.…”

“…Therefore, the mathematical model for the BFRC layer alone includes many nonlinear equations in partial derivatives. A simpler mathematical model for calculating the thermal protection of multilayer containers under fi re conditions was developed on the basis of the experimental results of [7] in [9] and evaluated in [11]. This model showed a good performance in calculating the heating of a structure under the conditions of laboratory and bench tests [9,11].…”

“…A simpler mathematical model for calculating the thermal protection of multilayer containers under fi re conditions was developed on the basis of the experimental results of [7] in [9] and evaluated in [11]. This model showed a good performance in calculating the heating of a structure under the conditions of laboratory and bench tests [9,11].In the present paper, on the basis of the models of [11][12][13] the thermal regime of the wood incorporated into a multilayer structure protected against fi re by an SGK-1 bloating fl ame-retardant coating has been investigated.Formulation of the Problem. The layout of the layers of the structure (tablet inside the frame) in the cylindrical system of coordinates z, r is shown in Fig.…”