Orifice flanges are specialized pipe flanges designed for use with orifice meters to measure fluid flow in pipelines accurately. These flanges are critical components in the oil, gas, petrochemical, water treatment, and chemical industries, where precise flow measurement is essential for process control and billing. Orifice flanges are manufactured to strict industry standards, ensuring durability, leak-proof performance, and compatibility with a wide range of piping systems. They are available in a variety of materials, including carbon steel, stainless steel, alloy steel, duplex stainless steel, and nickel alloys, each offering unique properties to withstand different operating conditions such as high pressure, extreme temperatures, and corrosive environments.
Orifice flanges are typically available in standard pressure classes ranging from 150# to 2500#, and in sizes from 1/2 inch to 48 inches. They are designed to accommodate orifice plates and ensure proper sealing and alignment for accurate differential pressure measurement. Depending on the application, these flanges can be supplied in various types, including weld neck, slip-on, threaded, and blind configurations. Each type serves a specific purpose, from providing easy installation and maintenance to ensuring high-pressure performance and structural integrity.
The precision manufacturing of orifice flanges involves strict quality control measures, including dimensional checks, material testing, and surface finish inspections, to meet the requirements of international standards such as ANSI, ASME, DIN, EN, and API. Additionally, orifice flanges may be supplied with additional coatings or treatments to enhance corrosion resistance, wear resistance, or suitability for specific industrial environments. The correct selection of flange material and type is crucial to achieving reliable and long-lasting performance, reducing maintenance costs, and preventing downtime in critical industrial operations.
Orifice flanges also play an essential role in ensuring safety in pipeline operations by preventing leaks and maintaining structural integrity under varying pressures and temperatures. They are widely used in flow metering applications for oil, gas, steam, and water systems, as well as in chemical processing, refinery operations, and power generation. By selecting high-quality orifice flanges from reputable manufacturers, industries can achieve accurate flow measurement, regulatory compliance, and overall operational efficiency.
| Property | Carbon Steel | Stainless Steel | Alloy Steel | Duplex Stainless Steel | Nickel Alloys |
|---|---|---|---|---|---|
| Type | Weld Neck, Slip-On, Threaded, Blind | Weld Neck, Slip-On, Threaded, Blind | Weld Neck, Slip-On, Threaded, Blind | Weld Neck, Slip-On, Threaded, Blind | Weld Neck, Slip-On, Threaded, Blind |
| Pressure Rating | 150#–2500# | 150#–2500# | 150#–2500# | 150#–2500# | 150#–2500# |
| Size Range | 1/2"–48" | 1/2"–48" | 1/2"–48" | 1/2"–48" | 1/2"–48" |
| Temperature Range | -29°C to 427°C | -196°C to 870°C | -29°C to 600°C | -29°C to 570°C | -50°C to 982°C |
| Standards | ANSI/ASME B16.5, B16.36, API 6A | ANSI/ASME B16.5, B16.36, API 6A | ANSI/ASME B16.5, B16.36, API 6A | ANSI/ASME B16.5, B16.36, API 6A | ANSI/ASME B16.5, B16.36, API 6A |
| Corrosion Resistance | Good for general applications | Excellent in oxidizing environments | Good under high temperatures | Excellent for chloride and chemical resistance | Exceptional in highly corrosive environments |
| Applications | Oil, Gas, Water Pipelines | Chemical, Petrochemical, Water | Refinery, Petrochemical | Marine, Chemical, Oil & Gas | Specialized chemical, High-temperature industries |
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