Integral Orifice Assembly : This type of assembly is used where the Differential Pressure Transmitter has to be mounted directly on the Orifice Assembly. This eliminates the impulse tubing from Orifice Assembly to DP Transmitter. This type of assembly is used for line size below 2” (50 NB). The transmitter in mounted on the orifice assembly with the help of 3-Way Manifold. The assembly consists of orifice plate with two integral blocks having corner taps. It also consists of a meter run pipe having length of 750mm on the upstream side and 250mm on downstream side.