Analysis and calculation of minimum safe flow in saturated steam pipeline

 Analyses the gas/liquid two-phase flow in saturated steam pipeline using Baker flow pattern chart and Baker parameter model, and judges two-phase flow regime. Finds that water hammer will probably happen when the flow regime becomes cylindrical as steam flow drops, and the flow at this point is called the minimum safe flow. Through the theoretical calculation of a saturated steam pipeline example in the model, finds the distribution law of Baker parameters with the change of steam flow, and obtains the calculation method for the minimum safe flow of saturated steam. Based on the correlation characteristics of Baker parameter curve with the factors such as saturated steam characteristics, pipe diameter, insulation material, drain and so on, proposes the measures avoiding water hammer in saturated steam pipeline as steam flow drops.