Orifice Flange (Orifice Plate Flange Assembly)

1️⃣ Product Introduction 

VikTech Fittings is a trusted manufacturer, exporter, and supplier of precision-engineered Orifice Flanges, manufactured in compliance with ASME standards including ASME B16.36 and ASME B16.5.

Orifice Flanges are specifically designed for flow measurement applications in piping systems. They are used together with an orifice plate and pressure tapping arrangement to measure flow rate of liquids, gases, and steam.

These flanges are supplied in pairs (upstream & downstream) and are equipped with radial tapped holes for differential pressure instruments.

Orifice Flanges are widely used in oil & gas, petrochemical plants, refineries, power stations, and process industries where accurate flow monitoring is essential.

2️⃣ Technical Specifications

Product Name                        Orifice Flange

Standards                               ASME B16.36, ASME B16.5

Size Range                             ½″ (DN15) to 24″ (DN600)

Pressure Class                       Class 150, 300, 600, 900, 1500, 2500

Facing Types                           RF, RTJ

Tapping Type                          Flange Taps / Corner Taps (Optional)

Manufacturing                         Forged

Supplied As                            Matched Pair (With Jack Screws)

Certification                            EN 10204 3.1 / 3.2

3️⃣ Available Material Grades

▶ Carbon Steel (CS)

• ASTM A105

• ASTM A350 LF2

▶ Stainless Steel (SS)

• ASTM A182 F304 / 304L

• F316 / 316L

▶ Alloy Steel

• ASTM A182 F11

• F22

▶ Duplex & Super Duplex

• F51 (UNS S31803)

• F60 (UNS S32205)

▶ Nickel Alloys (On Request)

• Inconel 625

• Monel 400

• Hastelloy C276

4️⃣ Size & Pressure Range

• Size: ½″ to 24″

• Pressure Ratings: Class 150 – 2500

• Bore: Standard or custom

• With jack screws for easy plate removal

Orifice flanges are generally supplied in matched pairs to maintain alignment and measurement accuracy.

5️⃣ Standards & Compliance

• ASME B16.36

• ASME B16.5

• ISO Certified Manufacturing

• IBR Approved (On Request)

• PED Compliant (On Request)

6️⃣ Design & Features

• Radial tapped holes for pressure gauges

• Jack screw holes for easy separation

• Supplied as matched pair

• Compatible with standard orifice plates

• Accurate alignment for differential pressure measurement

• Available with RTJ facing for high-pressure service

Dimensional tolerances maintained as per ASME standards.

7️⃣ Manufacturing & Heat Treatment

• Closed die forging

• CNC machining

• Drilling & tapping for pressure ports

• Facing & serration

• Heat treatment (if required)

• Final inspection & marking

8️⃣ Pressure & Temperature Ratings

MaterialTemperature RangePressure ClassCarbon SteelUp to 425°CClass 150 – 2500Stainless SteelUp to 870°CClass 150 – 2500Alloy SteelUp to 590°CClass 300 – 2500DuplexUp to 300°CHigh pressure

(Actual rating as per ASME pressure-temperature chart.)

9️⃣ Testing & Quality Control

✔ Dimensional Inspection
✔ Tapping & Thread Inspection
✔ PMI Testing
✔ Ultrasonic Testing
✔ Hardness & Tensile Testing
✔ Third Party Inspection – TUV / BV / SGS
✔ EN 10204 3.1 Certification
✔ Heat Number Traceability

🔟 Applications & Industries

• Oil & Gas Industry

• Refineries

• Petrochemical Plants

• Power Generation Plants

• Steam Flow Measurement

• LNG & Cryogenic Systems

• Process Industries

Orifice Flanges are essential for accurate flow measurement in critical piping systems.

1️⃣1️⃣ Surface Finish Options

• Anti-Rust Oil

• Black Coating

• Hot Dip Galvanized

• FBE Coated

• Zinc Coated

1️⃣2️⃣ Packing & Marking

• Supplied in matched pair packing

• Wooden crates / pallets

• Plastic face protectors

• Marking: Size, Grade, Class, Heat No., Standard

• Tapping specification marking

• Seaworthy export packing

1️⃣3️⃣ Why Choose VikTech Fittings?

• Precision machining for flow accuracy

• Matched pair supply assurance

• Strong forging quality

• High pressure capability

• Competitive project pricing

• Export-ready documentation

• Reliable delivery schedule

1️⃣4️⃣ SEO Keywords

• Orifice flange manufacturer India

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• High pressure orifice flange

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