Hazard Analysis of Jet Fire Based on Oil Pipeline Leakage

When the onshore, long-distance natural gas pipeline operates the normal gas transmission, its starting pressure is 4.5-6.4 MPa. Ending pressure is generally more than 1 Mpa. Once the injection happens, the gas leakage speed is big and the Reynolds number can reach 10⁴ orders of magnitude, which is a turbulent jet. It inevitably leads to an injection fire encountering the fire source and causing casualties and property losses in the industry-high-density and living-high-density areas. Therefore, studying the injection fire hazards and figuring out its basic parameters - such as the hazard radius, the hazard strength and the damage mechanism - are of great significance for effective prediction of the failure risk of the natural gas pipeline, effective protection for people's property and life safety. Based on the history data and test, the paper:(1) establishes and improves the relevant mathematic model; and (2) preliminarily establishes the consequence calculation method (which can quantitatively analyze and research the injection fire hazards resulting from the natural gas pipeline leakage), thereby providing the decision support for natural gas pipeline risk assessment, risk management, andpipeline maintenance, as well as the hazard consequence assessment after the injection fire occurred.