Abstract. Some publications describe an effect, produced during a physical model experiment, when an adjacent gas-free room influences the gas explosion pressure in a room with a window. The explosion pressure in this case significantly exceeds (2.5 times) the explosion pressure in a room without an adjacent room. This result has been confirmed by our studies. Based on other available information about the influence of the ignition point location on the explosion pressure in one room, it was suggested that this could be true for an explosion in two rooms. In our studies we used a test unit with two connected chambers, each having a volume of 1.125 m 3 . It turned out that this influence of the adjacent volume was not so unambiguous as it was described in those publications. It was found out that the maximum effect of explosion pressure amplification by the adjacent room is achieved, when the igniter is located in the chamber filled with a gas-air mixture in the area between the center of the chamber and the window (maximum amplification by more than 3 times). This effect is lower directly by the window (1.8 times) and is practically absent in case of ignition within the area near the passage connecting the chamber with the adjacent room. This suggests that the effect discovered earlier is a special case of the general dependence of the gas explosion pressure in two chambers on the igniter location.

The effects of quick pressure balance during deflagration explosions in the test chambers are considered. The experimental records of pressure time dependence obtained from various tests, as well as the results of the explosive combustion numeral modeling have been analyzed. The load levels of the explosion-affected structure and equipment elements due to the impulse and vibration actions formed during deflagration in the combustible gas have been assessed. It was demonstrated that the explosive actions formed during deflagration in the combustible gas in field could lead to dangerous loading of the critical equipment elements - sensors, instruments, electronic boards, etc., including the fire system elements of buildings and constructions, sea platforms, vessels and ships, as well as other sophisticated civil and military facilities. The experimental development programs for security systems of such facilities should include deflagration explosion testing with low prime cost and short periods of execution. Such testing cannot be replaced with the development on vibration and shock tables due to specific nature of loading during deflagration emergency explosions.

Abstract. The article is devoted to analysis of obtained during testing of sandwich panels and insulating glass as VP results. Here are the details on the first periodic test VP method GOST R 56289-2014 «Design translucent legkousvaivaemyh for buildings» using measuring instruments and testing equipment according to this standard, and, accordingly, the results of tests with additional observations obtained during the research.