As a result of an analysis of a damper system, a solution to a fire damper is developed using the continuity equation of damper control and orthogonal array. The fire damping device is made with a CAE software. Additionally, new H-120 grade fire damper is designed for the optimal offshore structure. This device will soon be tested on an actual offshore structure. An optimized fire temper is finally achieved using an orthogonal array. Using the result of present study will provide an environment friendly fire damper for offshore plants by choosing the optimum fire damper conditions