Orifice Plate Manufacturer, Supplier & Exporter in India
Arrotop is a trusted Orifice Plate Manufacturer in India offering high-accuracy flow measurement solutions for oil & gas, power plants, chemical industries, water treatment, process plants, refineries, and industrial automation applications.
We manufacture precision-machined orifice plates for differential pressure flow measurement of liquids, gases, steam, compressed air, chemicals, and process fluids. Our orifice plates are designed and manufactured as per ISO, AGA, ASME, API, and ANSI standards to ensure reliable and repeatable flow measurement performance in demanding industrial conditions.
Industrial Orifice Plates for Accurate Flow Measurement
An orifice plate is one of the most widely used primary flow elements installed in pipelines to measure flow rate by creating a pressure difference across the plate. When fluid passes through the accurately machined bore, the flow velocity increases and pressure decreases. This differential pressure is measured using DP transmitters to calculate the flow rate.
Due to their simple construction, long service life, easy installation, and low maintenance, orifice plates continue to be the preferred choice for industrial flow measurement systems worldwide.
Our orifice plates are suitable for:
- Liquid flow measurement
- Gas flow measurement
- Steam flow measurement
- High-pressure process lines
- High-temperature applications
- Boiler and utility systems
- Chemical dosing and process plants
Types of Orifice Plates manufactured by Arrotop
Orifice plates come in various types like concentric, eccentric, segmental, conical and square edged. Each is designed for specific fluids and flow conditions to ensure accurate and efficient flow measurement across diverse industrial applications.
A concentric orifice plate ensures high accuracy and is ideal for clean liquids, gases, and steam, offering the lowest uncertainty in flow measurement.
Eccentric orifice plates, with an off-center bore, offer accurate and reliable flow measurement, especially for fluids with solids or entrained gases.
Segmental Orifice Plate, with a segment-shaped bore, ensures accurate flow measurement of fluids with solids, vapors, or condensates.
Quarter circle orifice plates feature a rounded inlet, combining orifice and nozzle benefits for accurate flow measurement in viscous or low Reynolds fluids.
Multi-hole orifice plates, with 4 radially placed bores, enhance flow measurement accuracy and stability in systems using square edge, eccentric, or segmental types.
Conical entrance orifice plates ensure precise flow measurement in pipelines, widely used in oil and gas industries for accurate oil and gas flow monitoring.
Restriction orifice plates reduce flow and pressure to protect downstream equipment and minimize noise, ensuring safe and efficient system operation.
Square-edged concentric orifice plates measure bidirectional flow with precision, using a straight central hole machined into a thin metal plate.
RTJ orifice plates with integral oval/octagonal gaskets suit high-temp, high-pressure flows; ideal for clean liquids, gases, and low-velocity steam.
Working Principle of Orifice Plate
The working principle of an orifice plate is based on Bernoulli’s theorem and differential pressure measurement. When a restriction is introduced inside a flowing pipeline, the fluid accelerates while passing through the orifice opening, causing a drop in pressure.
The pressure difference between the upstream and downstream sides of the plate is directly proportional to the flow rate. This differential pressure is transmitted to a DP transmitter or flow transmitter for accurate flow calculation.
The accuracy of flow measurement largely depends on:
- Proper sizing of the orifice bore
- Precision machining
- Correct installation
- Sharp edge condition
- Proper pressure tapping arrangement
Specifications
- Design Standards : Manufactured as per ISO 5167, ISA RP 3.2, BS 1042, DIN 1952, ASME and AGA recommendations for differential pressure flow measurement applications.
- Orifice Plate Types : Available in Concentric, Eccentric, Segmental, Quadrant Edge, Conical Entrance and Restriction Orifice designs.
- Plate Material : Standard construction in SS 304, SS 316 and SS 316L. Optional materials such as Hastelloy, Monel, Duplex SS, PTFE Coated, PP and PVC can be supplied for corrosive service conditions.
- Bore Calculation Standards : Orifice bore sizing is carried out in accordance with ISO 5167, BS 1042, ASME MFC-3M, AGA-3 and other internationally accepted flow calculation standards.
- Tab / Handle Arrangement : Supplied with welded tab plate in matching material. Integral one-piece handle type construction can also be offered on request.
- Vent & Drain Holes : Vent and drain holes can be provided based on fluid characteristics and installation requirements as per applicable industry standards.
- Flange Compatibility : Suitable for installation between Weld Neck, Slip-On, Threaded and Socket Weld orifice flanges with RF or RTJ facing configurations.
- Pressure Tappings : Corner taps for smaller line sizes, flange taps for medium sizes and D & D/2 tapping arrangements for larger pipelines.
- Gasket Material : Supplied with CAF, PTFE, Graphite Filled or Spiral Wound gaskets depending on operating pressure, temperature and media compatibility.
- RTJ Construction : For RTJ flange assemblies, the orifice plate holder is generally manufactured in soft iron material and functions as a sealing gasket.
- Studs & Nuts : Standard fasteners supplied in ASTM A193 Grade B7 studs with ASTM A194 Grade 2H nuts. Other material grades available on request.
- Jack Screws : Jack screws supplied in ASTM A193 B7 / ASTM A194 2H material combination for easy plate removal and maintenance.
Types of Orifice Plates We Manufacture
We manufacture and supply various types of industrial orifice plates including:
- Concentric Orifice Plate
- Eccentric Orifice Plate
- Segmental Orifice Plate
- Restriction Orifice Plate
- Integral Orifice Plate
- Quadrant Edge Orifice Plate
- Paddle Type Orifice Plate
- Carrier Ring Orifice Plate
- Meter Run Assemblies
These are available with:
- RF / RTJ flange compatibility
- Corner tap, flange tap, radius tap & D-D/2 tapping
- Custom bore sizes
- Line sizes as per customer requirement
- SS304, SS316, Monel, Hastelloy and special materials
Applications of Orifice Plates
Our orifice plates are widely used in:
- Oil & Gas Industries
- Petrochemical Plants
- Power Generation Plants
- Water & Wastewater Treatment
- Pharmaceutical Industries
- Food Processing Industries
- Fertilizer Plants
- HVAC & Utility Systems
- Steam Distribution Lines
- Industrial Process Automation
Why Choose Arrotop as Your Orifice Plate Manufacturer?
At Arrotop, we specialize in designing and manufacturing high-quality orifice plates tailored to diverse industrial flow measurement requirements. Our integrated design, manufacturing, and testing facilities are among the finest in the country.
We have successfully supplied Orifice Plate Assemblies to numerous domestic and international projects across industries such as oil & gas, power, petrochemicals, and process plants.
Advantages :
- Precision-engineered orifice plates
- Custom manufacturing as per process requirement
- Compliance with international standards
- Fast delivery for industrial projects
- Competitive pricing for bulk requirements
- Technical support for sizing and selection
- Export supply capability worldwide
- Quality-tested products for reliable operation
We supply orifice plates for EPC contractors, panel builders, OEMs, instrumentation companies, system integrators, and industrial maintenance projects across India and overseas markets.
Materials Offered for Orifice Plates
We manufacture custom orifice plates in a wide range of materials, including:
- Stainless Steel (SS 304 / 304L)
- Stainless Steel (SS 316 / 316L)
- Carbon Steel
- Duplex Stainless Steel
- Super Duplex Stainless Steel
- Alloy Steel
Material selection is optimized based on fluid type, pressure, temperature, and corrosion resistance requirements.
Custom Orifice Plate & Assembly Solutions
We offer fully customized solutions including:
- Custom bore sizes and plate thickness
- Special coatings and surface treatments
- Orifice Flange Unions
- Orifice Carrier Assemblies
- Complete documentation and technical support
Our experts assist with selection, installation, and maintenance, ensuring optimal performance throughout the product lifecycle.
Compliance, Standards & Testing
Our orifice plates are engineered and manufactured in accordance with internationally recognized flow measurement standards, ensuring accuracy and repeatability across applications. Designs comply with standards such as ISO 5167, ASME MFC-3M, AGA-3, BS 1042, and ISA RP 3.2, depending on customer and project requirements.
To ensure material integrity and service suitability, routine quality checks such as PMI testing and NACE compliance can be provided where required.
Advanced Design & Installation Options
We offer multiple pressure tapping configurations, including corner taps, flange taps, and D–D/2 taps, selected based on pipe size and flow conditions. Vent and drain holes can be incorporated as per application needs to ensure accurate measurement in liquid, gas, or steam service.
Orifice plates can be supplied with weld neck, slip-on, threaded, or socket-weld orifice flange unions, manufactured in accordance with applicable ANSI standards.
Material & Customization Capabilities
While stainless steel grades such as SS 304, SS 316, and SS 316L are commonly used, we also offer orifice plates in special alloys and coated materials including Hastelloy, Monel, and PTFE-lined options for corrosive and high-temperature services.
Each orifice plate can be customized with specific bore sizes, plate thicknesses, coatings, gaskets, and fastening materials to match process conditions and customer specifications.
FAQs for Orifice Plates
Q. What is an orifice plate and how does it work?
An orifice plate is a differential pressure flow measurement device installed in a pipeline. It measures flow by creating a pressure drop across a precisely machined bore, which is proportional to the fluid flow rate.
Q. What standards are used for orifice plate design and calculation?
Orifice plates are designed and calculated as per international standards such as ISO 5167, ASME MFC-3M, AGA-3, BS 1042, and ISA RP 3.2, depending on application and customer requirements.
Q. What materials are used for manufacturing orifice plates?
Orifice plates are commonly manufactured in SS 304, SS 316, SS 316L, Carbon Steel, and special alloys such as Duplex, Super Duplex, Monel, and Hastelloy, depending on pressure, temperature, and corrosion conditions.
Q. How accurate is an orifice plate for flow measurement?
When designed and installed as per standards, an orifice plate can achieve an accuracy of ±0.5% to ±1%, depending on flow conditions, piping configuration, and differential pressure measurement.
Q. What pressure tapping arrangements are available for orifice plates?
Common pressure tapping arrangements include corner taps, flange taps, and D–D/2 taps. The selection depends on pipe size, line conditions, and applicable standards.
Q. Can orifice plates be supplied as complete assemblies?
Yes, orifice plates can be supplied as complete assemblies, including orifice flange unions, carrier rings, gaskets, studs, and meter run assemblies, ready for installation.