Orifice Assembly

Integral Orifice Assembly Features

• Designed for direct mounting on Differential Pressure Transmitters

• Available in sizes 15 NB to 50 NB

• Material options: Carbon Steel (C.S.) & Stainless Steel (S.S.)

• Eliminates three major measurement inaccuracies seen in small orifice line installations

• No impulse tubing required – fewer leakage points

• Reduces startup time and improves reliability

Description

An Integral Orifice Plate Assembly (IOPA) is a compact and complete flow measurement device that mounts directly to the Differential Pressure Transmitter.
It eliminates the need for external impulse piping, reducing installation complexity and minimizing potential leak points.

The assembly includes:

• Integral orifice plate

• Body

• Studs & nuts

• Gaskets

The units are available with socket weld or threaded end connections, and can also be supplied with upstream & downstream piping with flanged ends as per requirement.

Technical Specifications General

• Line Size: 15 NB to 50 NB (½” to 2” NB)

• Accuracy: ±2% of F.S.

Materials

• Orifice Plate:

  • AISI 316

  • AISI 304

  • Hastelloy C

  • Monel

  • Other materials on request

• Body Material:

  • A351-CF8M

  • A216-WCB

  • A105

  • A182-F316

• Gasket Material:

  • PTFE

Orifice Flange Assembly Features

• Orifice design compliant with BS EN ISO 5167

• Available in multiple Orifice Assembly Types:

  1. WNRF

  2. SORF

  3. RT

  4. Other types on request

• Available in a wide range of materials

• No moving parts – simple, robust construction

• Suitable for Liquid, Gas & Vapor applications

• Available in Non-IBR and IBR Certified versions

• Maintenance-free design

Description

Orifice flange assemblies are designed for applications where an orifice plate or flow nozzle is required for flow measurement.
These flanges replace standard pipe flanges and come with integrated pressure tappings, eliminating the need for separate carriers or additional tapping in the pipeline.

Key highlights:

• Precision-machined pressure taps in each flange

• Available in socket weld or weld neck types

• Supplied with two ½" NPT tappings in each flange

• Equipped with jacking screws for easy removal of the orifice plate

• Delivered as a complete assembly including bolts, nuts, and gasket kits

• Suitable for a wide range of line sizes and pressure classes

Technical Specifications General

• Line Size: 15 NB to 1000 NB (½” to 40”)

• Accuracy: ±1% of F.S.

Pressure Taps

• Flange Tap

• Corner Tap

• Radius Tap (D & D/2 Tap)

Material Options

• Flanges:

  • A105

  • A182-F316

  • A182-F304

  • A182-F11

  • A182-F22

  • Other materials available on request

• Gaskets:

  • CAF

  • SWG (Spiral Wound Gasket)

  • PTFE

  • Other materials on request

Orifice Plate – Differential Pressure Flow Element Features

• Orifice design as per BS EN ISO 5167

• Available Orifice Types:

  1. Concentric Square Edge

  2. Quarter Circle

  3. Segmental

  4. Eccentric

• Wide range of material options

• No moving parts – simple, robust design

• Suitable for Liquid, Gas & Vapor applications

• Maintenance-free

• Ideal for high temperature and high pressure conditions

Description

Electronet series Orifice Plate is one of the most widely used differential pressure primary flow elements.
It operates on proven flow measurement principles, contains no moving parts, and is suitable for high-temperature and high-pressure applications.

These orifice plates are recommended for:

• Clean liquids

• Gases

• Low-velocity steam

Accurate flow measurement using orifice plates requires correct positioning of upstream and downstream pressure tapping points.
A variety of orifice carrier assemblies are available to suit a wide range of industrial applications.

Technical Specifications General

• Line Size: 15 NB to 1000 NB (½” to 40”)

• Accuracy: ±1% of F.S.

Orifice Types

• Concentric Square Edge

• Quarter Circle

• Conical Entrance

• Segmental

• Eccentric

Material Options

• AISI 316

• AISI 304

• Hastelloy C

• Monel