A premier manufacturer and global exporter of high-quality Flanges, Pipe Fittings, and Forged Fittings. Delivering precision-engineered solutions in Stainless, Carbon, and Alloy Steel to over 60 countries.
Engineered with precision flow tappings for accurate metering of liquids and gases.
SOTCO Orifice Flanges are used in conjunction with orifice meters to measure flow rates in pipelines. Unlike standard flanges, they feature pairs of pressure tappings machined directly into the flange ring. This eliminates the need for separate orifice carriers or pipe wall drilling.
Key Feature: Every set comes with a **Jack Screw** mechanism. This allows for safe and easy spreading of the flanges to inspect or replace the Orifice Plate and gaskets without springing the pipeline.
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Design Standard | ASME B16.36 (Dimensions & Tolerances for Orifice Flanges) |
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Available Sizes | 1″ to 24″ (Standard Coverage) |
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Pressure Class Coverage |
Weld Neck: Class 300, 400, 600, 900, 1500, 2500 Slip-On / Threaded: Class 300 Only |
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Tapping Connections | 2x 1/2" NPT Tappings (180° apart) per flange. Plugged on request. |
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Facing Types | Raised Face (RF) - Smooth or Serrated, Ring Type Joint (RTJ) |
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Hardware | Supplied with Jack Screws (for spreading) and Precision Plugs. |
ASTM A105 / A105N
A350 LF2 (Low Temp)
ASTM A182 F304/L
ASTM A182 F316/L
ASTM A182 F11, F22
High Temp Service
Duplex / Super Duplex
Inconel, Monel
| Nominal Size (NPS) |
Flange Data (in) | Hub (in) | Drilling (in) | |||||
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| O.D (O) | Thick (C) | R.F (R) | Len (Y) | Base (X) | Circle | Holes | Dia | |
| 1" | 4.88 | 0.69 | 2.00 | 2.44 | 2.12 | 3.50 | 4 | 0.75 |
| 1 1/2" | 6.12 | 0.81 | 2.88 | 2.69 | 2.75 | 4.50 | 4 | 0.88 |
| 2" | 6.50 | 0.88 | 3.62 | 2.75 | 3.31 | 5.00 | 8 | 0.75 |
| 2 1/2" | 7.50 | 1.00 | 4.12 | 3.00 | 3.94 | 5.88 | 8 | 0.88 |
| 3" | 8.25 | 1.12 | 5.00 | 3.12 | 4.62 | 6.62 | 8 | 0.88 |
| 4" | 10.00 | 1.25 | 6.19 | 3.38 | 5.75 | 7.88 | 8 | 0.88 |
| 6" | 12.50 | 1.44 | 8.50 | 3.88 | 8.12 | 10.62 | 12 | 0.88 |
| 8" | 15.00 | 1.62 | 10.62 | 4.38 | 10.25 | 13.00 | 12 | 1.00 |
| 10" | 17.50 | 1.88 | 12.75 | 4.62 | 12.62 | 15.25 | 16 | 1.12 |
| 12" | 20.50 | 2.00 | 15.00 | 5.12 | 14.75 | 17.75 | 16 | 1.25 |
Accurately machined 1/2" NPT tappings ensure reliable differential pressure measurement.
Integrated jack screw system allows easy separation of flanges for orifice plate replacement.
Strict adherence to ASME B16.36 ensures compatibility with all standard orifice plates.