Abstract: A clamping device for stiff explosion panels for closing off a safety opening in a holder filled with powder, gas or vapor, where a frame is fastened around the safety opening and several inclined clip strips are provided between the frame and the sides of the explosion panel for pressing the explosion panel onto the frame, wherein the clamping device comprises plural upright connecting blocks, a housing for each connecting block which fits over the associated connecting block to cover the connecting block, two clamping edges in each housing lying opposite one another, the connecting blocks and housings being spaced apart, one of each of the connecting blocks and associated housing being fastened to the perimeter of the explosion panel and the other to the perimeter of the frame, and at least two diverging clip strips in each housing, one end of each strip being supported by the connecting block and the other end pressing on one of the clamping edges of the housing in order to connect the housing to the conne