Description
Orifice ring assemblies are used for flow measurement of smaller or medium sized pipes at lower pressure. Each assembly consists of one orifice plate and two orifice rings. Differential pressure is taken out in a corner tap system. Orifice block, which are of a unit-construction type and provide higher pressure ratings than the orifice ring assemblies, also are available.
Specification
Orifice bore type |
Concentric square edged orifice Quadrant edged orifice |
Flow calculation standards |
ISO 5167-1 and 2 2003 AGA-3 ASME MFC-3M and 14M JIS Z 8762 BS 1042 |
Flange ratings |
JIS 5, 10, 16, and 20K ANSI (or JPI) 150 and 300Lb (Note: ANSI and JPI ring dimensions are identical) |
Pressure taps |
Corner taps |
Plate thickness |
3, 6, 9, 12 mm and Over |
Pressure tab nipples |
Pipe size : 15 mm (½ inch), Sch 40 and 80 Length : 75 and 150 mm Tap connections : ½ PT and ½ NPT male socket welding and butt welding flange connection |
Drain and vent hole |
Per ASME recommendations Not drilled for orifice bores smaller than 25.4 mm |
Markings |
Upstream side of tab handle stamped "Upstream" and with bore type and size, line size, tag number and flange rating. |
Special markings |
Special marking may be furnished to meet special requirements |
Materials |
Ring and pressure tap nipple : 304SS and 316SS and Other Plate : 304SS, 316L SS, Monel and other |
Gaskets |
Material : Non-Asbestos and Teflon Thickness : 1.5, 2.0 and 3.0 mm |
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