Abstract: In view of the issue that the variation in the gas consumed from end user of blast furnace gas supply system affects operating safety of blast furnace gas pipeline networks, based on the real operation situation of some blast furnace gas pipeline networks, an experimental system which can simulate the variation in pressure and flow rate inside the pipe with the occurrence of furnace gas pipeline networks accident is set up. The experimental system consists of experimental platform and data acquisition system. The experimental gas source is the compressed air compressed and stored by the air compressor and the pipeline networks are composed of a main pipe and a tubular loop. Under the experimental conditions, flowmeters and differential gauges are adopted to measure the key points of main pipe section and tubular loop in real-time.Data acquisition system is used to obtain the variation at key points of the pipeline, and the flow rate variation of the gas inside the pipeline is accordingly determined. The research results show that the instantaneous steady flow produced in the experimental system is able to well simulate the accident situations caused by the variation of non-pipe elements, which is of great help in preventing actual pipeline hazards.