The impingement plate is an important protecting device of tube bank which is located on shell side at the nozzle inlet of shell and tube heat exchanger. Current work presents a 2D numerical investigation of the flow structure developing around different impingement plate design under different flow conditions using ANSYS Fluent. Location, size and arrangement of impingement plate are the investigated parameters which provides significant information for the selection of ideal location and size of required impingement plate. Study compares different plate geometry and concludes the best one which apart from protecting the tube banks, also removes the stagnation zone developing behind them because of their placements.