Orifice Flanges Product Range Catalogue - Offshore ….pdfVIP

Hydraulic Offshore Supplies Orifice Flanges Catalogue YOUR GATEWAY TO GLOBAL SUPPLY HOSE ASSEMBLIES PRESSURE TESTING WALFORM EQUIPMENT PACKAGES FLANGES PIPE TUBE ANSI ORIFICE FLANGES ORIFICE FLANGES are widely used in conjunction with orifice meters for measuring the rate of flow of liquids and gases. They are basically the same as standard welding neck , slip-on and screwed flanges except for the provision of radial, tapped holes in the flange ring for meter connections and additional bolts to act as jack screws to facilitate separating the flanges for inspection or replacement of the orifice plate. NOTES : JACK SCREW PROVISION (1) Each Flange shall have a machine bolt mounted in a hole drilled on the flange centerline at 90 deg. from the pressure taps, for use as a jackscrew, Machine bolt shall be regular, with one heavy hex, net. (2) A slot shall be provided in the flange 0.06 in. (1.6mm) wider than the width across flats of the nut. The depth of the shot shall admit the nut so that there is no interference with the joining of the flanges when bolted together without orifice plate. PRESSURE TAPS (1) Each orifice falnge is provided with two pressure tap holes extending radially from the outside diameter of the flange to the inside diameter of the flange. Corner taps may be used on NPS 1 1/2 and smaller if space permits. Each pressure tap hole shall be equipped with a pipe plug. (2) The 0.94 in. (23.8) locating dimension for raised face and 0.75 in. (19.1mm) for ring joint shall be measured at the bore. (3) Each pressure tap hole shall be equipped with a pipe plug. FACING The finish of Contact Faces Shall Conform to the Requirements of ASME / ANSI B 16.5 FLANGE THREADS (1) Theaded flanges shall have an American Notional Standard taper pipe thread conforming to ANSI B 2.1 (2) The thread shall be concentric with the axis of the flange and variations in alignment shall not exceed 0.06 in (1.6mm) per foot. (3) The flanges are made