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Orifice plates are widely used for flow measurement as they provide the simplest and the most economical means of flow detection.

Orifice plates are available in the concentric type that the round opening (Bore) of the orifice plate is positioned concentrically with the center of the pipe and the opening edge (Bore edge) is available either in the concentric square edge type (Sharp, square edge type) or in the quadrant edge type (Round edge type).

Orifice plates are also available in the eccentric type that the opening of the orifice is shifted from the center of the pipe.

They also are available in the segmental type that the opening is a circular segment and the orifice is comparable to a partially opened gate valve.

Specifications

Drain & Vent Hole

  • Not Drilled for Orifice Bores Smaller Than 25.4 mm
  • Per ASME Recommendations

Flange Ratings

  • JIS 10, 16, 20, 30, 40, & 63K
  • ANSI Class 150, 300, 600, 900, 1,500 & 2,500 lbs

Flow Calculation Standards

  • ASME MFC-3M & 14M JIS Z 8762
  • BS 1042
  • ISO 5167-1 & 2 2003 AGA-3

Markings

  • Upstream Side of Tab Handle Stamped ”Upstream” & with Bore Typical & Size, Line Size, Tag Number & Flange Rating

Orifice Bore Type

  • Concentric Square Edged Orifice Quadrant Edged Orifice
  • Eccentric Orifice
  • Segmental Orifice

Plate Material

  • Non-Standard: Monel, Hastelloy C, Titanium & etc.
  • Standard: 304 Stainless Steel & 316L Stainless Steel

Plate Thickness

  • 3, 6, 9 & 12 mm

Pressure Taps

  • Flange Taps Corner Taps
  • Vena Contract Taps
  • 1D & 1/2D (Radius) Taps Pipe Taps (21/2D & 8D)

Special Markings

  • Special Marking May be Furnished to Meet Special Requirement

Tab Handle

  • Welded to Orifice Plate
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