Orifice Plate Flow Meter is one kind of differential pressure flow meter which fitted with standard orifice throttling element. It has long history; plenty reference material on both theory and practice, mature on usage. It is the most popular flow meter which widely used in many field. The throttling element of standard orifice flow meter is strictly following the international standard for design, manufacture, installation and operation. Orifice Plate Flow Meters, flange unions, and holding blocks offer lower capital investment and ease of replacement. The technologies are field-proven and well suited for a variety of applications.
Orifice Plate Materials
The standard material for their orifice plates is stainless steel to ASTM A240 316/316L.Other materials can be used if required and these include 304 SS; 321 SS; Alloy 400; Alloy 825; Alloy C276; Titanium; Alloy 625; 22Cr Duplex stainless steels; 25Cr Super Duplex st steels; 6 Mo stainless steel; 90/10 Cu/Ni, PTFE.
Orifice Plate Tap Types
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Calculations
Calculations are performed in accordance with BS EN ISO 5167-1: 2003, unless otherwise requested.
Other calculation standards are available, including: ASME, API, R W Miller, L W Spink.
Pressure loss
Typically between 40 and 95% of the generated differential pressure, dependent on the throat ratio (d/D).
Concentric, Segmental, Eccentric, Quadrant Edge, Radius Taps
Orifice bore tolerance strictly in accordance with A.G.A, Asme, ISO5167, ISA and BS standards.
Orifice Flanges (ANSI B16.36) Materials
Carbon Steel ASTM A105 / A350; Stainless Steel ASTM A182; Alloy C-276 ASTM B564/575; or Alloy 400 ASTM B564/127; DIN 1.4571 (316Ti SST)(1); DIN 1.0460 (carbon steel)
RF Orifice Flange, WN Orifice Flange,SW Orifice Flange, RTJ Orifice Flange, Flange Unions
