Orifice Flanges

Orifice Flanges are a simple device with welding ends, for securely holding an orifice plate in a pipe.

The package includes the orifice plate with data tap, a pair of flanges with integrated taps, a set of gaskets, bolts and nuts and a jackscrew to assist separating the flanges for orifice inspection.

Design can be with RF or RTJ weld neck flanges or RF slip-on flanges. The orifice plates are centered within very close tolerances of the standards.

Depending on customer requirements, the typicall 1/2 in. or 3/4 in. tappings have a but or socket weld, screw thread or flange connection. Tappings maybe equiped with condensate chambers and shut-off valves.

SEIKO standard orifice flanges are made of forged carbon steel or stainless steel. Other materials are available.

The flow calculation is performed according to the ISO 5167- Part1.

The typical uncertainty of uncalibrated orifice plates is +/-0,5%.

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