Orifice Flanges

①  What are orifice flanges and how do they work?

Orifice flanges are specialized marine pipeline measuring connectors, featuring an integrated orifice plate, precision sealing face and standardized dimensions. Their marine adapted design suits offshore pipelines, shipboard flow points and other marine measuring connections, withstanding navigation vibration, seawater corrosion, temperature fluctuations, limited space and deck load impact. As marine pressure resistant, leak proof measuring connectors, they have precise dimensions matching marine equipment, calibrated for marine use to ensure accurate fitting, reliable sealing and precise flow measurement. Their integrated, high rigidity structure distributes vibration, loads and thermal stress evenly,paired with marine anti-corrosion gaskets, they enhance stability and sealing in harsh marine conditions. Widely used in offshore flow measurement, marine fuel transfer and other marine scenarios, they provide reliable, vibration-resistant measuring protection.

②  What is the important advantage of using orifice flanges?

Orifice flanges combine high quality forged materials’ marine adaptability with integrated, high-rigidity stability. They are a safe, durable choice for offshore pipeline flow measurement, shipboard flow points, marine fuel transfer measuring, ballast water system detection, bulkhead penetration measuring and marine hydraulic valve flow connections. Their design enables precise fitting with complex interfaces and narrow shipboard spaces for efficient assembly; paired with marine anti-corrosion components, they offer excellent sealing and corrosion resistance. Their integrated, high-rigidity structure disperses stress, reducing fatigue failure risks, and balances assembly convenience with long-term reliability. More adaptable than standard measuring flanges to complex marine conditions, they are indispensable for ensuring marine pipeline flow measurement accuracy and connection integrity.

③  In which applications are orifice flanges suitable?

Orifice flanges are suitable for offshore pipeline flow measurement, shipboard flow points, marine fuel transfer, ballast water detection, bulkhead penetration measuring and marine hydraulic valve flow connections. They require seawater chloride pitting resistance, adaptability to complex interfaces and narrow spaces, and the ability to withstand marine pressure fluctuations, corrosion, temperature changes and navigation vibration. Widely used in offshore oil and gas, marine engineering and petrochemical industries, they suit harsh marine environments and corrosive media, offering reliable assembly, operational stability and corrosion resistance. Compared with standard measuring flanges, they better adapt to complex marine conditions, ensuring flow measurement accuracy and connection integrity.

④  When are orifice flanges not the right choice for my project?

For low pressure normal temperature onshore conventional systems without harsh conditions or precise flow measurement, orifice flanges are not cost effective. Their integrated orifice plate structure, precision measuring design and marine anti-corrosion features are unnecessary for simple, non-corrosive, low pressure onshore pipelines that don’t require precise flow detection. They are unsuitable for general onshore environments, light load non-cyclic scenarios, and only fit harsh offshore marine petrochemical conditions. Choose more cost effective alternatives: standard measuring flanges or ordinary onshore measuring connecting flanges.

⑤  What are the steps to install orifice flanges?

To install orifice flanges, first clean flange surfaces, pipeline interfaces and installation areas of oil, rust, welding slag, impurities and seawater residues with dedicated on site tools, verifying no impurities affect sealing and measurement reliability. Then perform professional surface pretreatment to enhance flatness and roughness especially for complex flanges, narrow shipboard and offshore confined areas to ensure tight fit, leak-proof sealing and accurate flow measurement. Adjust pretreatment parameters based on marine conditions, pressure and base materials to avoid poor sealing or inaccurate measurement. Install marine grade gaskets per specifications, align flanges and bolt holes, then fasten bolts evenly to prevent uneven stress or gasket damage. Verify alignment, bolt torque, gasket fit and flatness as needed, and conduct pressure or leak tests on critical marine connections to confirm full assembly, tight sealing and no medium leakage affecting measurement accuracy.