Flowell Paddle Type Orifice Plates are designed to be used with orifice flanges. Skilled craftsmen and state-of-the-are machining practices assure that our plates meet or exceed the stringent requirements of API 14.3, ISO 5167 and ISA RP3.2. All plates come with a standard 30 RMS surface finish unless otherwise requested. Flowell stocks 1/8" to 1/2" thick plates in both 304 and 316 stainless steel for sizes ranging from 1/2" to 36". Other sizes and materials are available on request. When ordering, please specify the following: Size, ANSI Rating, Thickness, Bore Diameter and Materia