TESTING METHOD FOR FIRE RESISTANCE OF NON-METAL AND FLEXIBLE METAL PIPES (VERSIONS) AND DEVICE FOR ITS IMPLEMENTATION (VERSIONS) Russian patent published in 2017 - IPC G01M3/00 

FIELD: test equipment.

SUBSTANCE: invention relates to the research of materials by determining its physical properties, in particular the strength properties of the solid materials by applying the mechanical forces to it, using the pneumatic or hydraulic facilities at high temperature, and can be used in testing of newly developed non-metal and flexible metal pipes, intended for use in automatic fire extinguishing plants, including the certification tests for fire resistance. The testing method for fire resistance (versions) of non-metal and flexible metal pipes and the device for its implementation (versions) includes the automatic maintaining around the test pipe of the certain temperature and the certain amount of hydraulic or pneumatic pressure inside the filled or unfilled pipe with liquid substance, continuous automatic control of the pipe integrity condition, as well as the liquid or gaseous substance supply shutdown and the heater turning off in the event of the pipe leakage. At that the fact of its leakage is determined by the pressure decrease in the cavity of the pipe and/or by the flavouring substance odour occur, that is preliminarily injected into the pipe before the test and/or by the steam occur, arising from the leakage in the form of the water drops or jets with high temperature area, surrounding the pipe, or by the interaction of the water drops or jets directly with the heater, and if it is necessary in the predetermined time intervals after the test pipe curing at the given temperature, the water with the preset pressure and flow rate is passed through it.

EFFECT: ability to provide the stable conditions during the testing process, and therefore the comparability of the test results, the automatic leakage monitoring, allows to provide testing with the filled or unfilled test pipe with the liquid or gaseous substance, with or without pressure, with or without the liquid substance flow rate from it.

4 cl, 3 dwg