Orifice flow meter

volumefor gasflange

Construction of orifice flow meter Orifice flow meter provides an easy and cheaper arrangement for the flow measurement through a pipe. Orifice flange assembly consists of a pair of flanges, Gasket, nut bolts. Most important orifice plate which is a thin circular plate with a sharp-edged concentric circular hole in it. The orifice plate is install concentric with the flanges or pipe with pressure tappings. Considering one of the three standard pairs covered by ISO 5167 and other standards. There are different types of orifice plate designs uses in industrial process plants for flow measurement. such as Square edge concentric, Quadrant edged, Conical entrance, Eccentric, Segment. Features of orifice meter Thickness of Orifice plates is approximately 3.18 to 6.35 mm Installation of orifice plates is easy. Orifice meters are the cost effective solution when it comes to flow measurement in larger pipelines. The most employed material of orifice plate use is stainless steel, thus compatible for almost all type of fluids measurement. turndown ratio of orifice plates is less than 5:1. The accuracy of Orifice plates is good for high flow rates. Orifice plates are suggested for clean fluids, gas and steam applications. Orifice plates generally have an accuracy of 2 to 4% of full scale. Viscosity effect of fluids is high in Orifice plates. Orifice plates are accessible for all pipe sizes. In case, the pressure drop is free, these plates prove to be cheap and efficient for measurement of flows in large size pipes i.e. pipes having diameter range beyond inches 6 inches