Orifice Flanges
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Orifice Flanges
Orifice flanges are specialized flanges designed to facilitate the measurement of fluid flow in pipelines through the use of orifice plates. Often used in various industries such as oil and gas, water treatment, and chemical processing, these flanges serve as critical components in flow measurement systems. Their primary function is to create a reliable junction where an orifice plate can be installed, allowing for the precise calculation of flow rates based on differential pressure readings across the opening.
The design of orifice flanges typically conforms to industry standards, such as ANSI/ASME B16.36, which specifies the dimensions, materials, and pressure ratings for compatible systems. Orifice flanges are usually manufactured from materials such as carbon steel, stainless steel, or alloy materials, depending on the application requirements. These flanges come in various sizes and pressure classes, ensuring compatibility with diverse pipeline systems while maintaining the required structural integrity and resistance to pressure and temperature extremes.
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Understanding the Design and Functionality of Orifice Flanges
An essential feature of orifice flanges is their built-in alignment, which ensures that the orifice plate is correctly positioned and securely held in place. This alignment minimizes the risk of leakage and enhances the accuracy of flow measurements. Many orifice flanges also include tapping points for pressure measurement, allowing operators to obtain critical data for flow calculations. These flanges are designed to simplify the installation and maintenance processes, making them an efficient solution for flow measurement applications.
In addition to their flow measurement capabilities, orifice flanges contribute to the overall safety and efficiency of piping systems. By allowing for accurate flow monitoring, these flanges help operators make informed decisions regarding system operations, detect potential issues, and optimize performance. Regular maintenance and periodic inspections of orifice flanges and associated components are essential to ensure continued accuracy and reliability in flow measurement, ultimately enhancing operational efficiency and safety in diverse industrial environments.
Features Of Orifice Flanges
- Standardized Design
- Material Options
- Integrated Tapping Points
- Alignment and Flexibility
- Versatile Size Range
Application Of Orifice Flanges
- Flow Measurement in Oil and Gas
- Chemical Processing
- Water and Wastewater Treatment
- Power Generation
- HVAC Systems
Specification Of Orifice Flanges
| Specification | Details |
| Standard | ANSI/ASME B16.36, ASME B16.5, or as specified |
| Material Options | Carbon Steel, Stainless Steel (304, 316), Alloy Steel (e.g., 410) |
| Sizes | NPS 1/2" to 24" (or custom sizes) |
| Pressure Rating | Standard classes: 150#, 300#, 600#, 900#, 1500# (varies by size) |
| Thickness | Varies by size and pressure class (typically 0.25" to 1.25") |
| Bolt Hole Pattern | Standardized per ANSI standards (e.g., number of holes, diameter) |
| Bolt Hole Diameter | Typically 0.5" to 2" depending on size and pressure class |
| Face Type | Flat Face (FF), Raised Face (RF), or Ring Type Joint (RTJ) |
| Gasket Compatibility | Designed for standard gasket types (specify as needed) |
| Overall Length | Varies depending on nominal size and pressure rating |
| Finish | Typically machined or polished as per customer requirements |
| Testing | Hydrostatic testing, non-destructive testing available |
| Certifications | ISO, PED, or other relevant industry standards |
| Custom Fabrication | Options for custom sizes, materials, and designs available |
Dimensional Tolerances of Orifice Flanges
| Dimension | Nominal Size (inches) | Tolerance |
| Outer Diameter | 1/2" - 24" | ±1/16" or ±1.5% (whichever is greater) |
| Thickness | Up to 1" | ±1/16" |
| Bolt Hole Diameter | 1/2" - 1.5" | ±1/32" |
| 2" - 24" | ±1/16" | |
| Center-to-Center Distance of Bolt Holes | Up to 12" | ±1/16" |
| 12" - 24" | ±1/8" | |
| Face Flatness | - | 0.005 inches per 12 inches |
| Overall Length | Standard Sizes | ±1/8" or as specified by the customer |
| Weight | Varies by size and material | Weight calculations per ASME/ANSI standards |
| Seal and Gasket Surface Finish | - | Generally ±0.005 inches |
