Orifice meter

This sturdy orifice meter has been designed based on the differential pressure method and constricts the velocity of the process fluid using a machined restriction to facilitate accurate volumetric data collection.

This multi-purpose differential pressure offers a remarkable utility base and can be considered one of the most effective orifice flow meters for use with clean liquids, steam, and gas.

With a square-edge concentric orifice plate, this system is capable of handling high flow rates and makes an efficient orifice meter for large-diameter pipelines at relatively lower setup costs.

For easy installation in the field, this orifice flow meter system is available as either the complete carrier ring orifice system or the integral orifice flange assembly system.

• High-accuracy turbine flow meter designed for custody transfer applications.
• Suitable for measuring crude oil, diesel, and refined petroleum products.
• Provides excellent repeatability for fiscal and commercial transactions.
• Lower cost compared to many other custody transfer flow measurement technologies.
• Integrated electronic module with turbine rotor and pickup coil.
• Supports real-time transaction printing with date, time, flow rate, and totalized flow (printer option).
• Ideal for pipeline metering stations, tanker loading/unloading, storage terminals, and allocation metering.
• NABL traceable calibration with optional NACE MR0175 compliance.

• Fluid: Crude Oil, Diesel & Refined Petroleum Products
• Flow Range: Up to 1000 m³/hr
• Fluid Type: Clean, Low-Viscosity Liquids
• Application: Custody Transfer / Fiscal Metering
• Traceability: NABL Traceable

Unimpeded Flow through Pipeline

The fluid stream continuously flows through the major pipeline. An orifice meter for large diameter pipelines is firmly mounted on its integral orifice flange assembly to create a complete seal around the raw stream flow.

Restriction and Velocity Rise

The stream continues its flow to experience a restriction in the form of a square edge concentric orifice plate. The medium experiences a rise in velocity as it squeezes itself through the central passage and its sharp edges.

Pressure Drop in Fluid Stream

In accordance with Bernoulli’s principle, there is an instant pressure drop behind the orifice plate because of a sharp rise in the fluid velocity.

Mechanical Pressure Tapping

There exists a unique carrier ring orifice assembly to measure the pressure difference at specific locations before and after the restriction. For small installations, the orifice flow meter for clean liquids helps guide the pressure drop through connection ports.

Assembly Types

• Carrier Ring Orifice Assembly: Machined carrier ring with integrated corner tappings
• Integral Orifice Flange Assembly: Pre-assembled compact unit with precision flange taps

Bore Profiles

• Square Edge Concentric Orifice Plate: For standard clean liquids, low-viscosity gases, and steam
• Eccentric Orifice Plate: For multi-phase fluids or media with suspended solids
• Segmental Orifice Plate: For heavy sediment or slurry operations

Line Sizes

• Standard Ranges: 15 NB to 300 NB
• Large Diameter Pipelines: Custom configurations exceeding 24 inches (600 NB)

Material of Construction (MOC)

• Orifice Plate: SS316, SS316L, SS304, Hastelloy C, Monel
• Flange & Carrier Body: Cast Iron, Carbon Steel (A105), SS304, SS316

Pressure Tap Options

• Types: Flange Taps, Corner Taps, D & D/2 Pipe Taps
• Standards: Conforming to ISO 5167 / ASME MFC-3M calculations

Flow Measurement at Lower Cost: Orifice Meter is one such cost-effective method for measuring flow rate in pipelines, providing a cost-efficient way of measuring flow with its simple structure and less installation cost compared to inline flow meters.

Installation Made Easy: Orifice Plate Carrier Ring Assembly is designed in such a manner that it can be easily installed between two standard pipe flanges.

Made Durable: It is made up of high-grade stainless steel and is capable of performing well under harsh operating conditions of steam, gases, and liquids.

Reliable for Low Flow Applications: Integral Orifice Flange Assembly is manufactured with high accuracy to provide accurate differential pressure measurement in low-flow applications.