Flowstar Instruments Pvt. Ltd. Manufactures Orifice Plates & Flange Assemblies. Flowstar Instruments Pvt. Ltd. Is an ISO 9001:2000 registered company. Orifice Plates & Flange Assemblies is used for a variety of flow conditions for mounting carrier ring and with RJ plate hold for mounting between RJ flanges. Orifice Plates & Flange Assemblies are mode to AGA/ASME recommendation and provide means to flow measurement. These flanges cover complete range of sizes and pressure ratings up to ASA 2500 of ANSI B16.36 as standards viz, -API, MSS, BS and DIN etc. Are available on request. These flange assemblies are supplied ready to install in pipelines complete with tud, nuts, jack bolts, gaskets and drain plugs.