Orifice Flanges Manufacturer & Supplier in Mumbai

Orifice flanges are a specialized pair of flanges — an orifice flange set consisting of two flanges (upstream and downstream) machined with radial and axial pressure tap holes — used to accommodate an orifice plate for flow measurement in a pipeline. Nishra Overseas is engaged in the manufacturing and supply of orifice flanges in Mumbai, serving process plants, EPC contractors, and instrumentation teams that need accurate, code-compliant flow-metering assemblies.

The orifice flange set clamps an orifice plate between two flanges, and the pressure taps drilled into the flange body allow differential pressure instruments to measure fluid flow rate through the line. Because these flanges are used directly in flow-measurement loops, dimensional accuracy of the tap holes and flange faces matters as much as the material and pressure rating. Orifice flanges are manufactured in carbon steel, stainless steel, and alloy steel, in weld neck and other end configurations, to ANSI/ASME B16.36 and related piping standards, and are supplied across oil & gas, petrochemical, chemical processing, power, and water treatment industries where custody-transfer or process flow monitoring is required.

Buyers sourcing orifice flanges in Mumbai typically need them matched to an existing pipeline class and an orifice plate specification supplied by the instrumentation engineer. Nishra Overseas works with EPC contractors, instrumentation OEMs, fabricators, and procurement teams to supply orifice flange sets against project drawings, with documentation to support inspection and traceability.

Orifice Flanges Manufacturer in Mumbai

As an orifice flanges manufacturer in Mumbai, the manufacturing sequence begins with raw material selection in the specified grade — carbon steel (such as A105), stainless steel (304/316 series), or alloy steel as required by the project. The forgings are rough-machined, and the flange body is then precision-machined for face flatness, bolt-circle accuracy, and bore dimensions. Radial and axial tap holes are drilled and tapped to the exact centerline positions specified by ASME B16.36, since even a small deviation affects the accuracy of the differential-pressure reading. Where required, heat treatment is carried out to achieve the specified mechanical properties, followed by surface finishing of the raised face or flat face. Each orifice flange goes through dimensional inspection before dispatch to confirm tap-hole position, face finish, and bolt-hole alignment are within tolerance. As a manufacturer, Nishra Overseas keeps the manufacturing process specific to orifice flange geometry rather than treating it as a standard weld neck or slip-on flange run.

Orifice Flanges Supplier in Mumbai

As an orifice flanges supplier in Mumbai, Nishra Overseas supplies both standard ANSI-class orifice flange sets and project-specific sizes for pipeline instrumentation packages. Supply includes single sets for maintenance/replacement requirements as well as bulk quantities for new plant construction and expansion projects. Technical assistance is available to help buyers confirm the correct pipe size, pressure class, tap size, and orientation before ordering. Documentation such as dimensional reports and material test certificates is provided along with the shipment where applicable; stock availability for a specific size and class should be confirmed at the time of enquiry.

Orifice Flanges Exporter

For overseas buyers, Nishra Overseas supports export supply of orifice flanges with export-standard packaging, marking, and documentation, including mill test certificates, packing lists, and inspection reports as required by the buyer's specification. Export documentation and traceability records are maintained against each order to support customs and project compliance requirements at the destination.

Orifice Flanges Specifications

Exact size, class, and tap configuration availability depends on project requirements; buyers are encouraged to share pipeline drawings or instrumentation specifications for a precise quotation.

Features of Orifice Flanges

• Precision-located radial and axial tap holes for accurate flow measurement
• Machined to accommodate orifice plates of matching pressure class
• Available in raised face and flat face configurations
• Compatible with standard ANSI pressure classes
• Suitable for high-pressure and high-temperature process lines
• Dimensionally consistent bolt circle for standard gasket and bolting compatibility
• Corrosion-resistant options in stainless and alloy steel grades
• Weldable neck design for secure pipeline integration
• Supports both differential-pressure and custody-transfer flow metering
• Manufactured to match project piping class without modification at site

Applications of Orifice Flanges

Orifice flanges are used wherever flow rate through a pipeline needs to be measured using the differential-pressure principle. In oil & gas and petrochemical facilities, they are installed on crude, gas, and product lines for process monitoring and custody transfer. In power plants, they support flow measurement on feedwater and process steam lines. In chemical processing and water treatment plants, orifice flanges enable accurate dosing and flow-balance monitoring across process units. Because the flange itself carries the tap connections, it eliminates the need for separate tapping fittings on the pipe run, which is why EPC contractors specify orifice flanges directly into pipeline instrumentation packages rather than fabricating tap points on site.

Industries We Serve

Nishra Overseas supplies orifice flanges to EPC contractors executing pipeline and plant instrumentation packages, OEMs building flow-metering skids, fabricators assembling spool pieces, instrumentation consultants specifying flow-measurement points, and procurement teams sourcing for maintenance, shutdown, and expansion projects across oil & gas, petrochemical, power, and process industries.

Standards & Specifications

Orifice flanges supplied by Nishra Overseas are manufactured with reference to ASME B16.36 (orifice flanges) and ASME B16.5 (pipe flanges) for dimensional and pressure-class conformance. Material grade compliance follows the relevant ASTM specification for the chosen material (such as A105 for carbon steel or A182 for stainless/alloy forgings), as confirmed by the project's material requisition.

Quality Standards & Testing of Orifice Flanges

Quality checks applicable to orifice flanges include raw material inspection, chemical composition analysis, mechanical testing, dimensional inspection of tap-hole location and face flatness, and visual inspection, with hydrostatic testing, PMI, and third-party inspection available where required by the project. Material Test Certificates (MTC) and traceability documentation are provided as required.

How to Select the Right Orifice Flanges

Selecting orifice flanges correctly requires matching the pipeline nominal size and schedule, pressure class, material grade, and tap-hole configuration to the orifice plate and instrumentation package specified by the process engineer. Buyers should also confirm the face type, gasket compatibility, bolting requirement, and any project-specific inspection or documentation requirement before placing an order.

Why Choose Nishra Overseas for Orifice Flanges?

Nishra Overseas manufactures and supplies orifice flanges matched to project piping class and instrumentation requirements, with material traceability and inspection documentation supported on request. [Add verified years of experience, certifications, and manufacturing infrastructure details here.] Customization against project drawings, export supply, and technical support during order finalization are part of the standard order process.

Orifice Flanges Supply for Industrial Projects

For EPC projects, plant expansions, and shutdown/maintenance schedules, Nishra Overseas supplies orifice flanges against approved drawings and material specifications, coordinating delivery timelines with project schedules for process piping and instrumentation packages.

Get a Quote for Orifice Flanges

To request a quotation for orifice flanges in Mumbai, share the pipe size, material grade, pressure class, tap configuration, applicable standard, quantity, and delivery location. [Add verified NAP — Business Name, Address, Phone, Email.]