Orifice flange are used instead of the normal pipe flanges when orifice plate or flow nozzle is applied. In other words, orifice flanges are utilized having orifice metres. The basic function just for this is to test this stream rate involving often gas or maybe beverages inside the respective pipeline. These flanges are utilized as a part of different modern applications and are accessible in different sizes and materials. All opening flange units are furnished with the plate, pressure association holes, and jack screws.