Aspects of determination of pressure losses in local resistances at hydraulic calculation of underground polyethylene gas pipelines are considered. Calculation of coefficient of local resistance of saddle branch of firm FRIALEN (Germany) is resulted. The analysis of the dependence of the local resistance coefficient on the geometric parameters of the main gas pipeline and the gas pipeline-input is given.

Keywords: gas pipeline, hydraulic calculation, pressure loss, coefficient of local resistance, gas consumption, geometrical parameters