Orifice Plates Design Specifications

Two basic styles of Orifice Plates are available. OFP for use in Orifice Fittings and Ring-Joint Plate Holders, and OFC/ORO Paddle Type for use in Orifice Flanges.
Edges:Square and Sharp, will not reflect a beam of light when viewed without magnification.
Finish:15-30 micro-inch roughness.
Flatness:Flat within 0.010 inches, per inch of dam height. (Dam height = pipe diameter minus orifice diameter, divided by 2.)
Bore:Orifice bore tolerance in strict accordance with A.P.I. Chapter 14, Section 3, A.G.A. Gas Measurement Committee Report No. 3, A.S.M.E., I.S.O., I.S.A., and with other societies' recommendations.
Material:Stock materials are 304 and 316 Stainless Steel, Monel and Hastelloy. Other materials furnished on request.
Design:Normal stocked items are the standard design used in all industries. Special designs are available on request.

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