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.

For more details visit: www.mac-weld.com

Orifice Plates

Mac-Weld orifice plates are manufactured to our quality controlled production from raw material to bore gauge inspection thru packaging. Stainless Steel plates are specifically purchased and individual plates are then water cut to ensure no distortion this also allows the handle to be an integral part with no welding up to 12".
Plates are bored to exact sizes and bore gauges used to ensure tolerances are maintained Jigs/fixtures are used to ensure the required flatness is also maintained.
Surface finish to 15-30 micro-inch is controlled by special finishing machines that are designed to preserve flatness.
Stamping/Identification, plates are lightly stamped to show the material, heat number, tag number, rating, bore size.
Inspection and packaging are all part of the complete package to ensure the plates get to our customers correctly.
For more details visit: www.mac-weld.com