Orifice Plates & Flange Assembly

Brand :- LOCUS
Material :- Stainless Steel (SS 304, SS 316, SS 316L), Carbon Steel, Alloy Steel
Size Range :- 1/2″ to 24″ (Custom sizes available)
Pressure Rating :- Up to 2500# (ANSI, DIN, JIS standards)
Application :- Flow Measurement in Pipelines (Oil, Gas, Water, Steam, Chemicals)
Compliance :- ISO 5167, ASME B16.36, API 14.3, AGA 3

Description

1. Description

Orifice Plates & Flange Assemblies are used in flow measurement systems to determine the rate of fluid passing through a pipeline. They create a pressure drop that is measured to calculate flow rate. Locus Brand ensures high-precision machining, superior corrosion resistance, and compliance with global industrial standards.

2. Specifications

Orifice Plate Types: Concentric, Eccentric, Segmental, Quadrant Edge
Flange Types: Slip-On, Weld Neck, Threaded, Socket Weld, Blind, Lap Joint
Flange Ratings: 150#, 300#, 600#, 900#, 1500#, 2500#
Thickness: 3 mm – 12 mm (Customizable)
Surface Finish: Machined, Polished
Standards: ASME, ANSI, API, ISO

3. Working

The Orifice Plate is installed between flanges in a pipeline. As fluid flows through the pipe, the orifice plate creates a restriction, generating a differential pressure. This pressure drop is measured using pressure taps, and using Bernoulli’s equation, the flow rate is calculated.

4.Principle

Based on the Bernoulli Principle, the velocity of a fluid increases as it passes through a restriction (orifice plate), leading to a drop in pressure. This differential pressure is proportional to the flow rate, allowing accurate measurement.

5. Assembly

Components: Orifice Plate, Flanges (Pair), Bolts & Gaskets
Connection Types: Welded, Bolted
Accessories: Pressure Taps, Gaskets, Stud Bolts, Drain/Vent Holes (if required)

6. Installation Process

Ensure the pipeline is clean and free of debris.
Align the orifice plate between the flange assembly.
Install gaskets to prevent leaks.
Tighten flange bolts uniformly to the recommended torque.
Connect pressure taps to a differential pressure transmitter.
Inspect for proper alignment and sealing.
Perform calibration & testing before operation.

7. Technical Specification

Parameter	Specification
Orifice Plate Material	SS 304, SS 316, SS 316L, Monel, Hastelloy
Flange Material	Carbon Steel, Alloy Steel, SS 304/316
Nominal Bore Size	1/2″ to 24″
Flange Pressure Rating	150# to 2500#
Face Finish	125-250 AARH
Compliance	ASME B16.36, ISO 5167, API 14.3
Testing	Hydrostatic, Radiography, Ultrasonic, PMI

8. Troubleshooting of Transparent Tubular Level Gauge

Problem	Possible Cause	Solution
Leakage	Gasket failure, Loose fittings	Tighten bolts, Replace gasket
Cloudy Visibility	Contaminated fluid	Clean gauge tube with solvent
Gauge Not Indicating Correct Level	Blockage in the tube	Flush with clean fluid
Cracks on Tube	Excess pressure or thermal shock	Use proper pressure-rated gauge

9. HS Codes

- Orifice Plate: 9026.10.00 (Flow Measuring Device)
- Flange Assembly: 7307.21.00 (Flanges for Pipes)

10. Why Choose LOCUS?

✔ High-Quality Manufacturing with precision machining.
✔ Customizable Solutions as per client needs.
✔ International Standards Compliance (ISO, ASME, API, ANSI, DIN).
✔ Competitive Pricing & On-Time Delivery.
✔ Expert Engineering Support for installation & troubleshooting.