Orifice flanges are one of the most economical means of measuring flow, and Superior Products Orifice Flanges are manufactured to be the most accurate.  Automatic machine tools enable Superior Products to meet the most stringent tolerances and recommendations for flanges as specified in ANSI B16.36,steel orifice flanges, and ANSI/API 2530 (AGA #3), orifice metering of natural gas, with careful attention given to tap location, bore smoothness, bolt and flange facings.  Superior Products Orifice Flanges are made of forged steel, A.S.T.M. A-105.  Other materials are available on special order.

The Bore and Counterbore is a special method to limit the plate edge thickness.  Instead of beveling at the normal 45 degrees, the plate is counterbored to the desired edge thickness.

'M' Series Orifice Flange Meter Tubes

Superior Products has designed its Classical Style Venturi Tubes to meet each customer's specific flow measurement needs with engineering that covers a wide range of applications.  these maintenance-free tubes offer a constant degree of accuracy, a low susceptibility to erosion, high pressure recovery, and they can be installed at any angle from horizontal to vertical.
Superior Products manufactures venturi tubes in sizes ranging from 2" to 48" and larger in accordance with A.S.M.E. Standard MFC-3M, 1985.  Customers can specify tubes for high and low pressures, volumes, and temperatures.  Construction materials include carbon, alloy, and stainless steels.  Superior Products can supply other materials on request for special applications.
Throughout the manufacturing process, skilled machinists and welders proceed according to A.S.M.E. - approved procedure specifications with supporting procedure qualification records.  Superior Products has A.S.M.E. authorization to use the "PP" (Power Piping) code symbol.  Stringent inspection procedures assure conformity to code or customer specifications.
Superior Products manufactures its venturi tubes to have an accuracy of + 1%* uncalibrated and + 25%* for a calibrated venturi tube and pipe section.

SUPERIOR PRODUCTS STRAIGHTENING VANES

REDUCE FLOW DISTURBANCE AND IMPROVE YOUR ORIFICE METERING CONDITIONS

Superior Products Straightening Vanes are installed in the upstream section of meter tubes to reduce flow disturbance preceeding the orifice plate.  Disturbance is often created by complex piping or valves which precede the orifice metering section.  As flow passes through the vane bundle, this disturbance is straightened and smoothed to a normal flow pattern.  Straightening Vanes are economical because their use often allows sufficient reduction of upstream meter tube length, so that a small building or enclosure is possible.  (See Superior Products Meter Tube Catalog Section "D" for meter tube lengths.)  Superior Products Straightening Vanes are manufactured in a variety of sizes in carbon steel, and in stainless steel.  They are in accordance with recommendations of the A.G.A., A.S.M.E., as well as numerous other societies and associations.  Three standard vane bundles are shown.  Each type bundle is available in a Flange Model and a Line Mode.  The tubes in each Superior Products vane bundle are welded at both ends at each point of tangency.  Tube inlets and outlets are reamed to permit minimum pressure drop.  Special spacer lugs on each vane bundle assure a perfect fit in the meter tube.  The Flange Model is held in the line by a flange ring which is clamped between two pipe line flanges.